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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Large chunks of this file are derived from the glsl crate which is:
+ * Copyright (c) 2018, Dimitri Sabadie <dimitri.sabadie@gmail.com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * * Neither the name of Dimitri Sabadie <dimitri.sabadie@gmail.com> nor the names of other
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+use glsl::syntax;
+use glsl::syntax::{ArrayedIdentifier, ArraySpecifier, ArraySpecifierDimension, AssignmentOp, BinaryOp, Identifier};
+use glsl::syntax::{NonEmpty, PrecisionQualifier, StructFieldSpecifier, StructSpecifier};
+use glsl::syntax::{TypeSpecifier, TypeSpecifierNonArray, UnaryOp};
+use std::cell::{Cell, Ref, RefCell};
+use std::collections::HashMap;
+use std::iter::FromIterator;
+use std::mem;
+use std::ops::{Deref, DerefMut};
+use std::rc::Rc;
+
+trait LiftFrom<S> {
+ fn lift(state: &mut State, s: S) -> Self;
+}
+
+fn lift<S, T: LiftFrom<S>>(state: &mut State, s: S) -> T {
+ LiftFrom::lift(state, s)
+}
+
+#[derive(Debug)]
+pub struct Symbol {
+ pub name: String,
+ pub decl: SymDecl,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct FunctionSignature {
+ ret: Type,
+ params: Vec<Type>,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct FunctionType {
+ signatures: NonEmpty<FunctionSignature>,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum SamplerFormat {
+ Unknown,
+ RGBA8,
+ RGBA32F,
+ RGBA32I,
+ R8,
+ RG8,
+}
+
+impl SamplerFormat {
+ pub fn type_suffix(self) -> Option<&'static str> {
+ match self {
+ SamplerFormat::Unknown => None,
+ SamplerFormat::RGBA8 => Some("RGBA8"),
+ SamplerFormat::RGBA32F => Some("RGBA32F"),
+ SamplerFormat::RGBA32I => Some("RGBA32I"),
+ SamplerFormat::R8 => Some("R8"),
+ SamplerFormat::RG8 => Some("RG8"),
+ }
+ }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum StorageClass {
+ None,
+ Const,
+ In,
+ Out,
+ Uniform,
+ Sampler(SamplerFormat),
+ FragColor(i32),
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct ArraySizes {
+ pub sizes: Vec<Expr>,
+}
+
+impl LiftFrom<&ArraySpecifier> for ArraySizes {
+ fn lift(state: &mut State, a: &ArraySpecifier) -> Self {
+ ArraySizes {
+ sizes: a.dimensions.0.iter().map(|a| match a {
+ ArraySpecifierDimension::Unsized => panic!(),
+ ArraySpecifierDimension::ExplicitlySized(expr) => translate_expression(state, expr),
+ }).collect(),
+ }
+ }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub enum TypeKind {
+ Void,
+ Bool,
+ Int,
+ UInt,
+ Float,
+ Double,
+ Vec2,
+ Vec3,
+ Vec4,
+ DVec2,
+ DVec3,
+ DVec4,
+ BVec2,
+ BVec3,
+ BVec4,
+ IVec2,
+ IVec3,
+ IVec4,
+ UVec2,
+ UVec3,
+ UVec4,
+ Mat2,
+ Mat3,
+ Mat4,
+ Mat23,
+ Mat24,
+ Mat32,
+ Mat34,
+ Mat42,
+ Mat43,
+ DMat2,
+ DMat3,
+ DMat4,
+ DMat23,
+ DMat24,
+ DMat32,
+ DMat34,
+ DMat42,
+ DMat43,
+ // floating point opaque types
+ Sampler1D,
+ Image1D,
+ Sampler2D,
+ Image2D,
+ Sampler3D,
+ Image3D,
+ SamplerCube,
+ ImageCube,
+ Sampler2DRect,
+ Image2DRect,
+ Sampler1DArray,
+ Image1DArray,
+ Sampler2DArray,
+ Image2DArray,
+ SamplerBuffer,
+ ImageBuffer,
+ Sampler2DMS,
+ Image2DMS,
+ Sampler2DMSArray,
+ Image2DMSArray,
+ SamplerCubeArray,
+ ImageCubeArray,
+ Sampler1DShadow,
+ Sampler2DShadow,
+ Sampler2DRectShadow,
+ Sampler1DArrayShadow,
+ Sampler2DArrayShadow,
+ SamplerCubeShadow,
+ SamplerCubeArrayShadow,
+ // signed integer opaque types
+ ISampler1D,
+ IImage1D,
+ ISampler2D,
+ IImage2D,
+ ISampler3D,
+ IImage3D,
+ ISamplerCube,
+ IImageCube,
+ ISampler2DRect,
+ IImage2DRect,
+ ISampler1DArray,
+ IImage1DArray,
+ ISampler2DArray,
+ IImage2DArray,
+ ISamplerBuffer,
+ IImageBuffer,
+ ISampler2DMS,
+ IImage2DMS,
+ ISampler2DMSArray,
+ IImage2DMSArray,
+ ISamplerCubeArray,
+ IImageCubeArray,
+ // unsigned integer opaque types
+ AtomicUInt,
+ USampler1D,
+ UImage1D,
+ USampler2D,
+ UImage2D,
+ USampler3D,
+ UImage3D,
+ USamplerCube,
+ UImageCube,
+ USampler2DRect,
+ UImage2DRect,
+ USampler1DArray,
+ UImage1DArray,
+ USampler2DArray,
+ UImage2DArray,
+ USamplerBuffer,
+ UImageBuffer,
+ USampler2DMS,
+ UImage2DMS,
+ USampler2DMSArray,
+ UImage2DMSArray,
+ USamplerCubeArray,
+ UImageCubeArray,
+ Struct(SymRef),
+}
+
+impl TypeKind {
+ pub fn is_sampler(&self) -> bool {
+ use TypeKind::*;
+ match self {
+ Sampler1D
+ | Image1D
+ | Sampler2D
+ | Image2D
+ | Sampler3D
+ | Image3D
+ | SamplerCube
+ | ImageCube
+ | Sampler2DRect
+ | Image2DRect
+ | Sampler1DArray
+ | Image1DArray
+ | Sampler2DArray
+ | Image2DArray
+ | SamplerBuffer
+ | ImageBuffer
+ | Sampler2DMS
+ | Image2DMS
+ | Sampler2DMSArray
+ | Image2DMSArray
+ | SamplerCubeArray
+ | ImageCubeArray
+ | Sampler1DShadow
+ | Sampler2DShadow
+ | Sampler2DRectShadow
+ | Sampler1DArrayShadow
+ | Sampler2DArrayShadow
+ | SamplerCubeShadow
+ | SamplerCubeArrayShadow
+ | ISampler1D
+ | IImage1D
+ | ISampler2D
+ | IImage2D
+ | ISampler3D
+ | IImage3D
+ | ISamplerCube
+ | IImageCube
+ | ISampler2DRect
+ | IImage2DRect
+ | ISampler1DArray
+ | IImage1DArray
+ | ISampler2DArray
+ | IImage2DArray
+ | ISamplerBuffer
+ | IImageBuffer
+ | ISampler2DMS
+ | IImage2DMS
+ | ISampler2DMSArray
+ | IImage2DMSArray
+ | ISamplerCubeArray
+ | IImageCubeArray
+ | USampler1D
+ | UImage1D
+ | USampler2D
+ | UImage2D
+ | USampler3D
+ | UImage3D
+ | USamplerCube
+ | UImageCube
+ | USampler2DRect
+ | UImage2DRect
+ | USampler1DArray
+ | UImage1DArray
+ | USampler2DArray
+ | UImage2DArray
+ | USamplerBuffer
+ | UImageBuffer
+ | USampler2DMS
+ | UImage2DMS
+ | USampler2DMSArray
+ | UImage2DMSArray
+ | USamplerCubeArray
+ | UImageCubeArray => true,
+ _ => false,
+ }
+ }
+
+ pub fn is_bool(&self) -> bool {
+ use TypeKind::*;
+ match self {
+ Bool | BVec2 | BVec3 | BVec4 => true,
+ _ => false,
+ }
+ }
+
+ pub fn to_bool(&self) -> Self {
+ use TypeKind::*;
+ match self {
+ Int | UInt | Float | Double => Bool,
+ IVec2 | UVec2 | Vec2 | DVec2 => BVec2,
+ IVec3 | UVec3 | Vec3 | DVec3 => BVec3,
+ IVec4 | UVec4 | Vec4 | DVec4 => BVec4,
+ _ => *self,
+ }
+ }
+
+ pub fn to_int(&self) -> Self {
+ use TypeKind::*;
+ match self {
+ Bool | UInt | Float | Double => Int,
+ BVec2 | UVec2 | Vec2 | DVec2 => IVec2,
+ BVec3 | UVec3 | Vec3 | DVec3 => IVec3,
+ BVec4 | UVec4 | Vec4 | DVec4 => IVec4,
+ _ => *self,
+ }
+ }
+
+ pub fn to_scalar(&self) -> Self {
+ use TypeKind::*;
+ match self {
+ IVec2 | IVec3 | IVec4 => Int,
+ UVec2 | UVec3 | UVec4 => UInt,
+ Vec2 | Vec3 | Vec4 => Float,
+ DVec2 | DVec3 | DVec4 => Double,
+ BVec2 | BVec3 | BVec4 => Bool,
+ _ => *self,
+ }
+ }
+
+ pub fn glsl_primitive_type_name(&self) -> Option<&'static str> {
+ use TypeKind::*;
+ Some(match self {
+ Void => "void",
+ Bool => "bool",
+ Int => "int",
+ UInt => "uint",
+ Float => "float",
+ Double => "double",
+ Vec2 => "vec2",
+ Vec3 => "vec3",
+ Vec4 => "vec4",
+ DVec2 => "dvec2",
+ DVec3 => "dvec3",
+ DVec4 => "dvec4",
+ BVec2 => "bvec2",
+ BVec3 => "bvec3",
+ BVec4 => "bvec4",
+ IVec2 => "ivec2",
+ IVec3 => "ivec3",
+ IVec4 => "ivec4",
+ UVec2 => "uvec2",
+ UVec3 => "uvec3",
+ UVec4 => "uvec4",
+ Mat2 => "mat2",
+ Mat3 => "mat3",
+ Mat4 => "mat4",
+ Mat23 => "mat23",
+ Mat24 => "mat24",
+ Mat32 => "mat32",
+ Mat34 => "mat34",
+ Mat42 => "mat42",
+ Mat43 => "mat43",
+ DMat2 => "dmat2",
+ DMat3 => "dmat3",
+ DMat4 => "dmat4",
+ DMat23 => "dmat23",
+ DMat24 => "dmat24",
+ DMat32 => "dmat32",
+ DMat34 => "dmat34",
+ DMat42 => "dmat42",
+ DMat43 => "dmat43",
+ Sampler1D => "sampler1D",
+ Image1D => "image1D",
+ Sampler2D => "sampler2D",
+ Image2D => "image2D",
+ Sampler3D => "sampler3D",
+ Image3D => "image3D",
+ SamplerCube => "samplerCube",
+ ImageCube => "imageCube",
+ Sampler2DRect => "sampler2DRect",
+ Image2DRect => "image2DRect",
+ Sampler1DArray => "sampler1DArray",
+ Image1DArray => "image1DArray",
+ Sampler2DArray => "sampler2DArray",
+ Image2DArray => "image2DArray",
+ SamplerBuffer => "samplerBuffer",
+ ImageBuffer => "imageBuffer",
+ Sampler2DMS => "sampler2DMS",
+ Image2DMS => "image2DMS",
+ Sampler2DMSArray => "sampler2DMSArray",
+ Image2DMSArray => "image2DMSArray",
+ SamplerCubeArray => "samplerCubeArray",
+ ImageCubeArray => "imageCubeArray",
+ Sampler1DShadow => "sampler1DShadow",
+ Sampler2DShadow => "sampler2DShadow",
+ Sampler2DRectShadow => "sampler2DRectShadow",
+ Sampler1DArrayShadow => "sampler1DArrayShadow",
+ Sampler2DArrayShadow => "sampler2DArrayShadow",
+ SamplerCubeShadow => "samplerCubeShadow",
+ SamplerCubeArrayShadow => "samplerCubeArrayShadow",
+ ISampler1D => "isampler1D",
+ IImage1D => "iimage1D",
+ ISampler2D => "isampler2D",
+ IImage2D => "iimage2D",
+ ISampler3D => "isampler3D",
+ IImage3D => "iimage3D",
+ ISamplerCube => "isamplerCube",
+ IImageCube => "iimageCube",
+ ISampler2DRect => "isampler2DRect",
+ IImage2DRect => "iimage2DRect",
+ ISampler1DArray => "isampler1DArray",
+ IImage1DArray => "iimage1DArray",
+ ISampler2DArray => "isampler2DArray",
+ IImage2DArray => "iimage2DArray",
+ ISamplerBuffer => "isamplerBuffer",
+ IImageBuffer => "iimageBuffer",
+ ISampler2DMS => "isampler2MS",
+ IImage2DMS => "iimage2DMS",
+ ISampler2DMSArray => "isampler2DMSArray",
+ IImage2DMSArray => "iimage2DMSArray",
+ ISamplerCubeArray => "isamplerCubeArray",
+ IImageCubeArray => "iimageCubeArray",
+ AtomicUInt => "atomic_uint",
+ USampler1D => "usampler1D",
+ UImage1D => "uimage1D",
+ USampler2D => "usampler2D",
+ UImage2D => "uimage2D",
+ USampler3D => "usampler3D",
+ UImage3D => "uimage3D",
+ USamplerCube => "usamplerCube",
+ UImageCube => "uimageCube",
+ USampler2DRect => "usampler2DRect",
+ UImage2DRect => "uimage2DRect",
+ USampler1DArray => "usampler1DArray",
+ UImage1DArray => "uimage1DArray",
+ USampler2DArray => "usampler2DArray",
+ UImage2DArray => "uimage2DArray",
+ USamplerBuffer => "usamplerBuffer",
+ UImageBuffer => "uimageBuffer",
+ USampler2DMS => "usampler2DMS",
+ UImage2DMS => "uimage2DMS",
+ USampler2DMSArray => "usamplerDMSArray",
+ UImage2DMSArray => "uimage2DMSArray",
+ USamplerCubeArray => "usamplerCubeArray",
+ UImageCubeArray => "uimageCubeArray",
+ Struct(..) => return None,
+ })
+ }
+
+ pub fn cxx_primitive_type_name(&self) -> Option<&'static str> {
+ use TypeKind::*;
+ match self {
+ Bool => Some("Bool"),
+ Int => Some("I32"),
+ UInt => Some("U32"),
+ Float => Some("Float"),
+ Double => Some("Double"),
+ _ => self.glsl_primitive_type_name(),
+ }
+ }
+
+ pub fn cxx_primitive_scalar_type_name(&self) -> Option<&'static str> {
+ use TypeKind::*;
+ match self {
+ Void => Some("void"),
+ Bool => Some("bool"),
+ Int => Some("int32_t"),
+ UInt => Some("uint32_t"),
+ Float => Some("float"),
+ Double => Some("double"),
+ _ => {
+ if self.is_sampler() {
+ self.cxx_primitive_type_name()
+ } else {
+ None
+ }
+ }
+ }
+ }
+
+ pub fn from_glsl_primitive_type_name(name: &str) -> Option<TypeKind> {
+ use TypeKind::*;
+ Some(match name {
+ "void" => Void,
+ "bool" => Bool,
+ "int" => Int,
+ "uint" => UInt,
+ "float" => Float,
+ "double" => Double,
+ "vec2" => Vec2,
+ "vec3" => Vec3,
+ "vec4" => Vec4,
+ "dvec2" => DVec2,
+ "dvec3" => DVec3,
+ "dvec4" => DVec4,
+ "bvec2" => BVec2,
+ "bvec3" => BVec3,
+ "bvec4" => BVec4,
+ "ivec2" => IVec2,
+ "ivec3" => IVec3,
+ "ivec4" => IVec4,
+ "uvec2" => UVec2,
+ "uvec3" => UVec3,
+ "uvec4" => UVec4,
+ "mat2" => Mat2,
+ "mat3" => Mat3,
+ "mat4" => Mat4,
+ "mat23" => Mat23,
+ "mat24" => Mat24,
+ "mat32" => Mat32,
+ "mat34" => Mat34,
+ "mat42" => Mat42,
+ "mat43" => Mat43,
+ "dmat2" => DMat2,
+ "dmat3" => DMat3,
+ "dmat4" => DMat4,
+ "dmat23" => DMat23,
+ "dmat24" => DMat24,
+ "dmat32" => DMat32,
+ "dmat34" => DMat34,
+ "dmat42" => DMat42,
+ "dmat43" => DMat43,
+ "sampler1D" => Sampler1D,
+ "image1D" => Image1D,
+ "sampler2D" => Sampler2D,
+ "image2D" => Image2D,
+ "sampler3D" => Sampler3D,
+ "image3D" => Image3D,
+ "samplerCube" => SamplerCube,
+ "imageCube" => ImageCube,
+ "sampler2DRect" => Sampler2DRect,
+ "image2DRect" => Image2DRect,
+ "sampler1DArray" => Sampler1DArray,
+ "image1DArray" => Image1DArray,
+ "sampler2DArray" => Sampler2DArray,
+ "image2DArray" => Image2DArray,
+ "samplerBuffer" => SamplerBuffer,
+ "imageBuffer" => ImageBuffer,
+ "sampler2DMS" => Sampler2DMS,
+ "image2DMS" => Image2DMS,
+ "sampler2DMSArray" => Sampler2DMSArray,
+ "image2DMSArray" => Image2DMSArray,
+ "samplerCubeArray" => SamplerCubeArray,
+ "imageCubeArray" => ImageCubeArray,
+ "sampler1DShadow" => Sampler1DShadow,
+ "sampler2DShadow" => Sampler2DShadow,
+ "sampler2DRectShadow" => Sampler2DRectShadow,
+ "sampler1DArrayShadow" => Sampler1DArrayShadow,
+ "sampler2DArrayShadow" => Sampler2DArrayShadow,
+ "samplerCubeShadow" => SamplerCubeShadow,
+ "samplerCubeArrayShadow" => SamplerCubeArrayShadow,
+ "isampler1D" => ISampler1D,
+ "iimage1D" => IImage1D,
+ "isampler2D" => ISampler2D,
+ "iimage2D" => IImage2D,
+ "isampler3D" => ISampler3D,
+ "iimage3D" => IImage3D,
+ "isamplerCube" => ISamplerCube,
+ "iimageCube" => IImageCube,
+ "isampler2DRect" => ISampler2DRect,
+ "iimage2DRect" => IImage2DRect,
+ "isampler1DArray" => ISampler1DArray,
+ "iimage1DArray" => IImage1DArray,
+ "isampler2DArray" => ISampler2DArray,
+ "iimage2DArray" => IImage2DArray,
+ "isamplerBuffer" => ISamplerBuffer,
+ "iimageBuffer" => IImageBuffer,
+ "isampler2MS" => ISampler2DMS,
+ "iimage2DMS" => IImage2DMS,
+ "isampler2DMSArray" => ISampler2DMSArray,
+ "iimage2DMSArray" => IImage2DMSArray,
+ "isamplerCubeArray" => ISamplerCubeArray,
+ "iimageCubeArray" => IImageCubeArray,
+ "atomic_uint" => AtomicUInt,
+ "usampler1D" => USampler1D,
+ "uimage1D" => UImage1D,
+ "usampler2D" => USampler2D,
+ "uimage2D" => UImage2D,
+ "usampler3D" => USampler3D,
+ "uimage3D" => UImage3D,
+ "usamplerCube" => USamplerCube,
+ "uimageCube" => UImageCube,
+ "usampler2DRect" => USampler2DRect,
+ "uimage2DRect" => UImage2DRect,
+ "usampler1DArray" => USampler1DArray,
+ "uimage1DArray" => UImage1DArray,
+ "usampler2DArray" => USampler2DArray,
+ "uimage2DArray" => UImage2DArray,
+ "usamplerBuffer" => USamplerBuffer,
+ "uimageBuffer" => UImageBuffer,
+ "usampler2DMS" => USampler2DMS,
+ "uimage2DMS" => UImage2DMS,
+ "usamplerDMSArray" => USampler2DMSArray,
+ "uimage2DMSArray" => UImage2DMSArray,
+ "usamplerCubeArray" => USamplerCubeArray,
+ "uimageCubeArray" => UImageCubeArray,
+ _ => return None,
+ })
+ }
+
+ pub fn from_primitive_type_specifier(spec: &syntax::TypeSpecifierNonArray) -> Option<TypeKind> {
+ use TypeKind::*;
+ Some(match spec {
+ TypeSpecifierNonArray::Void => Void,
+ TypeSpecifierNonArray::Bool => Bool,
+ TypeSpecifierNonArray::Int => Int,
+ TypeSpecifierNonArray::UInt => UInt,
+ TypeSpecifierNonArray::Float => Float,
+ TypeSpecifierNonArray::Double => Double,
+ TypeSpecifierNonArray::Vec2 => Vec2,
+ TypeSpecifierNonArray::Vec3 => Vec3,
+ TypeSpecifierNonArray::Vec4 => Vec4,
+ TypeSpecifierNonArray::DVec2 => DVec2,
+ TypeSpecifierNonArray::DVec3 => DVec3,
+ TypeSpecifierNonArray::DVec4 => DVec4,
+ TypeSpecifierNonArray::BVec2 => BVec2,
+ TypeSpecifierNonArray::BVec3 => BVec3,
+ TypeSpecifierNonArray::BVec4 => BVec4,
+ TypeSpecifierNonArray::IVec2 => IVec2,
+ TypeSpecifierNonArray::IVec3 => IVec3,
+ TypeSpecifierNonArray::IVec4 => IVec4,
+ TypeSpecifierNonArray::UVec2 => UVec2,
+ TypeSpecifierNonArray::UVec3 => UVec3,
+ TypeSpecifierNonArray::UVec4 => UVec4,
+ TypeSpecifierNonArray::Mat2 => Mat2,
+ TypeSpecifierNonArray::Mat3 => Mat3,
+ TypeSpecifierNonArray::Mat4 => Mat4,
+ TypeSpecifierNonArray::Mat23 => Mat23,
+ TypeSpecifierNonArray::Mat24 => Mat24,
+ TypeSpecifierNonArray::Mat32 => Mat32,
+ TypeSpecifierNonArray::Mat34 => Mat34,
+ TypeSpecifierNonArray::Mat42 => Mat42,
+ TypeSpecifierNonArray::Mat43 => Mat43,
+ TypeSpecifierNonArray::DMat2 => DMat2,
+ TypeSpecifierNonArray::DMat3 => DMat3,
+ TypeSpecifierNonArray::DMat4 => DMat4,
+ TypeSpecifierNonArray::DMat23 => DMat23,
+ TypeSpecifierNonArray::DMat24 => DMat24,
+ TypeSpecifierNonArray::DMat32 => DMat32,
+ TypeSpecifierNonArray::DMat34 => DMat34,
+ TypeSpecifierNonArray::DMat42 => DMat42,
+ TypeSpecifierNonArray::DMat43 => DMat43,
+ TypeSpecifierNonArray::Sampler1D => Sampler1D,
+ TypeSpecifierNonArray::Image1D => Image1D,
+ TypeSpecifierNonArray::Sampler2D => Sampler2D,
+ TypeSpecifierNonArray::Image2D => Image2D,
+ TypeSpecifierNonArray::Sampler3D => Sampler3D,
+ TypeSpecifierNonArray::Image3D => Image3D,
+ TypeSpecifierNonArray::SamplerCube => SamplerCube,
+ TypeSpecifierNonArray::ImageCube => ImageCube,
+ TypeSpecifierNonArray::Sampler2DRect => Sampler2DRect,
+ TypeSpecifierNonArray::Image2DRect => Image2DRect,
+ TypeSpecifierNonArray::Sampler1DArray => Sampler1DArray,
+ TypeSpecifierNonArray::Image1DArray => Image1DArray,
+ TypeSpecifierNonArray::Sampler2DArray => Sampler2DArray,
+ TypeSpecifierNonArray::Image2DArray => Image2DArray,
+ TypeSpecifierNonArray::SamplerBuffer => SamplerBuffer,
+ TypeSpecifierNonArray::ImageBuffer => ImageBuffer,
+ TypeSpecifierNonArray::Sampler2DMS => Sampler2DMS,
+ TypeSpecifierNonArray::Image2DMS => Image2DMS,
+ TypeSpecifierNonArray::Sampler2DMSArray => Sampler2DMSArray,
+ TypeSpecifierNonArray::Image2DMSArray => Image2DMSArray,
+ TypeSpecifierNonArray::SamplerCubeArray => SamplerCubeArray,
+ TypeSpecifierNonArray::ImageCubeArray => ImageCubeArray,
+ TypeSpecifierNonArray::Sampler1DShadow => Sampler1DShadow,
+ TypeSpecifierNonArray::Sampler2DShadow => Sampler2DShadow,
+ TypeSpecifierNonArray::Sampler2DRectShadow => Sampler2DRectShadow,
+ TypeSpecifierNonArray::Sampler1DArrayShadow => Sampler1DArrayShadow,
+ TypeSpecifierNonArray::Sampler2DArrayShadow => Sampler2DArrayShadow,
+ TypeSpecifierNonArray::SamplerCubeShadow => SamplerCubeShadow,
+ TypeSpecifierNonArray::SamplerCubeArrayShadow => SamplerCubeArrayShadow,
+ TypeSpecifierNonArray::ISampler1D => ISampler1D,
+ TypeSpecifierNonArray::IImage1D => IImage1D,
+ TypeSpecifierNonArray::ISampler2D => ISampler2D,
+ TypeSpecifierNonArray::IImage2D => IImage2D,
+ TypeSpecifierNonArray::ISampler3D => ISampler3D,
+ TypeSpecifierNonArray::IImage3D => IImage3D,
+ TypeSpecifierNonArray::ISamplerCube => ISamplerCube,
+ TypeSpecifierNonArray::IImageCube => IImageCube,
+ TypeSpecifierNonArray::ISampler2DRect => ISampler2DRect,
+ TypeSpecifierNonArray::IImage2DRect => IImage2DRect,
+ TypeSpecifierNonArray::ISampler1DArray => ISampler1DArray,
+ TypeSpecifierNonArray::IImage1DArray => IImage1DArray,
+ TypeSpecifierNonArray::ISampler2DArray => ISampler2DArray,
+ TypeSpecifierNonArray::IImage2DArray => IImage2DArray,
+ TypeSpecifierNonArray::ISamplerBuffer => ISamplerBuffer,
+ TypeSpecifierNonArray::IImageBuffer => IImageBuffer,
+ TypeSpecifierNonArray::ISampler2DMS => ISampler2DMS,
+ TypeSpecifierNonArray::IImage2DMS => IImage2DMS,
+ TypeSpecifierNonArray::ISampler2DMSArray => ISampler2DMSArray,
+ TypeSpecifierNonArray::IImage2DMSArray => IImage2DMSArray,
+ TypeSpecifierNonArray::ISamplerCubeArray => ISamplerCubeArray,
+ TypeSpecifierNonArray::IImageCubeArray => IImageCubeArray,
+ TypeSpecifierNonArray::AtomicUInt => AtomicUInt,
+ TypeSpecifierNonArray::USampler1D => USampler1D,
+ TypeSpecifierNonArray::UImage1D => UImage1D,
+ TypeSpecifierNonArray::USampler2D => USampler2D,
+ TypeSpecifierNonArray::UImage2D => UImage2D,
+ TypeSpecifierNonArray::USampler3D => USampler3D,
+ TypeSpecifierNonArray::UImage3D => UImage3D,
+ TypeSpecifierNonArray::USamplerCube => USamplerCube,
+ TypeSpecifierNonArray::UImageCube => UImageCube,
+ TypeSpecifierNonArray::USampler2DRect => USampler2DRect,
+ TypeSpecifierNonArray::UImage2DRect => UImage2DRect,
+ TypeSpecifierNonArray::USampler1DArray => USampler1DArray,
+ TypeSpecifierNonArray::UImage1DArray => UImage1DArray,
+ TypeSpecifierNonArray::USampler2DArray => USampler2DArray,
+ TypeSpecifierNonArray::UImage2DArray => UImage2DArray,
+ TypeSpecifierNonArray::USamplerBuffer => USamplerBuffer,
+ TypeSpecifierNonArray::UImageBuffer => UImageBuffer,
+ TypeSpecifierNonArray::USampler2DMS => USampler2DMS,
+ TypeSpecifierNonArray::UImage2DMS => UImage2DMS,
+ TypeSpecifierNonArray::USampler2DMSArray => USampler2DMSArray,
+ TypeSpecifierNonArray::UImage2DMSArray => UImage2DMSArray,
+ TypeSpecifierNonArray::USamplerCubeArray => USamplerCubeArray,
+ TypeSpecifierNonArray::UImageCubeArray => UImageCubeArray,
+ TypeSpecifierNonArray::Struct(..) | TypeSpecifierNonArray::TypeName(..) => return None,
+ })
+ }
+}
+
+impl LiftFrom<&syntax::TypeSpecifierNonArray> for TypeKind {
+ fn lift(state: &mut State, spec: &syntax::TypeSpecifierNonArray) -> Self {
+ use TypeKind::*;
+ if let Some(kind) = TypeKind::from_primitive_type_specifier(spec) {
+ kind
+ } else {
+ match spec {
+ TypeSpecifierNonArray::Struct(s) => {
+ Struct(state.lookup(s.name.as_ref().unwrap().as_str()).unwrap())
+ }
+ TypeSpecifierNonArray::TypeName(s) => Struct(state.lookup(&s.0).unwrap()),
+ _ => unreachable!(),
+ }
+ }
+ }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Type {
+ pub kind: TypeKind,
+ pub precision: Option<PrecisionQualifier>,
+ pub array_sizes: Option<Box<ArraySizes>>,
+}
+
+impl Type {
+ pub fn new(kind: TypeKind) -> Self {
+ Type {
+ kind,
+ precision: None,
+ array_sizes: None,
+ }
+ }
+
+ pub fn new_array(kind: TypeKind, size: i32) -> Self {
+ Type {
+ kind,
+ precision: None,
+ array_sizes: Some(Box::new(ArraySizes { sizes: vec![make_const(TypeKind::Int, size)] })),
+ }
+ }
+}
+
+impl LiftFrom<&syntax::FullySpecifiedType> for Type {
+ fn lift(state: &mut State, ty: &syntax::FullySpecifiedType) -> Self {
+ let kind = lift(state, &ty.ty.ty);
+ let array_sizes = match ty.ty.array_specifier.as_ref() {
+ Some(x) => Some(Box::new(lift(state, x))),
+ None => None,
+ };
+ let precision = get_precision(&ty.qualifier);
+ Type {
+ kind,
+ precision,
+ array_sizes,
+ }
+ }
+}
+
+impl LiftFrom<&syntax::TypeSpecifier> for Type {
+ fn lift(state: &mut State, ty: &syntax::TypeSpecifier) -> Self {
+ let kind = lift(state, &ty.ty);
+ let array_sizes = ty
+ .array_specifier
+ .as_ref()
+ .map(|x| Box::new(lift(state, x)));
+ Type {
+ kind,
+ precision: None,
+ array_sizes,
+ }
+ }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct StructField {
+ pub ty: Type,
+ pub name: syntax::Identifier,
+}
+
+fn get_precision(qualifiers: &Option<syntax::TypeQualifier>) -> Option<PrecisionQualifier> {
+ let mut precision = None;
+ for qual in qualifiers.iter().flat_map(|x| x.qualifiers.0.iter()) {
+ match qual {
+ syntax::TypeQualifierSpec::Precision(p) => {
+ if precision.is_some() {
+ panic!("Multiple precisions");
+ }
+ precision = Some(p.clone());
+ }
+ _ => {}
+ }
+ }
+ precision
+}
+
+impl LiftFrom<&StructFieldSpecifier> for StructField {
+ fn lift(state: &mut State, f: &StructFieldSpecifier) -> Self {
+ let mut ty: Type = lift(state, &f.ty);
+ match &f.identifiers.0[..] {
+ [ident] => {
+ if let Some(a) = &ident.array_spec {
+ ty.array_sizes = Some(Box::new(lift(state, a)));
+ }
+ StructField {
+ ty,
+ name: ident.ident.clone(),
+ }
+ }
+ _ => panic!("bad number of identifiers"),
+ }
+ }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct StructFields {
+ pub fields: Vec<StructField>,
+}
+
+impl LiftFrom<&StructSpecifier> for StructFields {
+ fn lift(state: &mut State, s: &StructSpecifier) -> Self {
+ let fields = s.fields.0.iter().map(|field| lift(state, field)).collect();
+ Self { fields }
+ }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum RunClass {
+ Unknown,
+ Scalar,
+ Vector,
+ Dependent(u32),
+}
+
+impl RunClass {
+ pub fn merge(self, run_class: RunClass) -> RunClass {
+ match (self, run_class) {
+ (RunClass::Vector, _) | (_, RunClass::Vector) => RunClass::Vector,
+ (RunClass::Dependent(x), RunClass::Dependent(y)) => RunClass::Dependent(x | y),
+ (RunClass::Unknown, _) | (_, RunClass::Dependent(..)) => run_class,
+ _ => self,
+ }
+ }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum SymDecl {
+ NativeFunction(FunctionType, Option<&'static str>, RunClass),
+ UserFunction(Rc<FunctionDefinition>, RunClass),
+ Local(StorageClass, Type, RunClass),
+ Global(
+ StorageClass,
+ Option<syntax::InterpolationQualifier>,
+ Type,
+ RunClass,
+ ),
+ Struct(StructFields),
+}
+
+#[derive(Clone, Debug, PartialEq, Copy, Eq, Hash)]
+pub struct SymRef(u32);
+
+#[derive(Debug)]
+struct Scope {
+ // The field is not actively used but useful for `Debug`.
+ #[allow(dead_code)]
+ name: String,
+ names: HashMap<String, SymRef>,
+}
+impl Scope {
+ fn new(name: String) -> Self {
+ Scope {
+ name,
+ names: HashMap::new(),
+ }
+ }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct TexelFetchOffsets {
+ pub min_x: i32,
+ pub max_x: i32,
+ pub min_y: i32,
+ pub max_y: i32,
+}
+
+impl TexelFetchOffsets {
+ fn new(x: i32, y: i32) -> Self {
+ TexelFetchOffsets {
+ min_x: x,
+ max_x: x,
+ min_y: y,
+ max_y: y,
+ }
+ }
+
+ fn add_offset(&mut self, x: i32, y: i32) {
+ self.min_x = self.min_x.min(x);
+ self.max_x = self.max_x.max(x);
+ self.min_y = self.min_y.min(y);
+ self.max_y = self.max_y.max(y);
+ }
+}
+
+#[derive(Debug)]
+pub struct State {
+ scopes: Vec<Scope>,
+ syms: Vec<RefCell<Symbol>>,
+ in_function: Option<SymRef>,
+ run_class_changed: Cell<bool>,
+ last_declaration: SymRef,
+ branch_run_class: RunClass,
+ branch_declaration: SymRef,
+ modified_globals: RefCell<Vec<SymRef>>,
+ pub used_globals: RefCell<Vec<SymRef>>,
+ pub texel_fetches: HashMap<(SymRef, SymRef), TexelFetchOffsets>,
+ clip_dist_sym: SymRef,
+ pub used_clip_dist: u32,
+}
+
+impl State {
+ pub fn new() -> Self {
+ State {
+ scopes: Vec::new(),
+ syms: Vec::new(),
+ in_function: None,
+ run_class_changed: Cell::new(false),
+ last_declaration: SymRef(0),
+ branch_run_class: RunClass::Unknown,
+ branch_declaration: SymRef(0),
+ modified_globals: RefCell::new(Vec::new()),
+ used_globals: RefCell::new(Vec::new()),
+ texel_fetches: HashMap::new(),
+ clip_dist_sym: SymRef(0),
+ used_clip_dist: 0,
+ }
+ }
+
+ pub fn lookup(&self, name: &str) -> Option<SymRef> {
+ for s in self.scopes.iter().rev() {
+ if let Some(sym) = s.names.get(name) {
+ return Some(*sym);
+ }
+ }
+ return None;
+ }
+
+ fn declare(&mut self, name: &str, decl: SymDecl) -> SymRef {
+ let s = SymRef(self.syms.len() as u32);
+ self.syms.push(RefCell::new(Symbol {
+ name: name.into(),
+ decl,
+ }));
+ self.scopes.last_mut().unwrap().names.insert(name.into(), s);
+ s
+ }
+
+ pub fn sym(&self, sym: SymRef) -> Ref<Symbol> {
+ self.syms[sym.0 as usize].borrow()
+ }
+
+ pub fn sym_mut(&mut self, sym: SymRef) -> &mut Symbol {
+ self.syms[sym.0 as usize].get_mut()
+ }
+
+ pub fn lookup_sym_mut(&mut self, name: &str) -> Option<&mut Symbol> {
+ self.lookup(name)
+ .map(move |x| self.syms[x.0 as usize].get_mut())
+ }
+
+ fn push_scope(&mut self, name: String) {
+ self.scopes.push(Scope::new(name));
+ }
+ fn pop_scope(&mut self) {
+ self.scopes.pop();
+ }
+
+ fn return_run_class(&self, mut new_run_class: RunClass) {
+ new_run_class = self.branch_run_class.merge(new_run_class);
+ if let Some(sym) = self.in_function {
+ let mut b = self.syms[sym.0 as usize].borrow_mut();
+ if let SymDecl::UserFunction(_, ref mut run_class) = b.decl {
+ *run_class = run_class.merge(new_run_class);
+ }
+ }
+ }
+
+ pub fn function_definition(&self, name: SymRef) -> Option<(Rc<FunctionDefinition>, RunClass)> {
+ if let SymDecl::UserFunction(ref fd, ref run_class) = &self.sym(name).decl {
+ Some((fd.clone(), *run_class))
+ } else {
+ None
+ }
+ }
+
+ fn merge_run_class(&self, sym: SymRef, mut new_run_class: RunClass) -> RunClass {
+ if sym.0 <= self.branch_declaration.0 {
+ new_run_class = self.branch_run_class.merge(new_run_class);
+ }
+ let mut b = self.syms[sym.0 as usize].borrow_mut();
+ let mut old_run_class = new_run_class;
+ if let SymDecl::Local(_, _, ref mut run_class) = b.decl {
+ old_run_class = *run_class;
+ new_run_class = old_run_class.merge(new_run_class);
+ *run_class = new_run_class;
+ }
+ if old_run_class != RunClass::Unknown && old_run_class != new_run_class {
+ self.run_class_changed.set(true);
+ }
+ new_run_class
+ }
+}
+
+/// A declaration.
+#[derive(Clone, Debug, PartialEq)]
+pub enum Declaration {
+ FunctionPrototype(FunctionPrototype),
+ StructDefinition(SymRef),
+ InitDeclaratorList(InitDeclaratorList),
+ Precision(PrecisionQualifier, TypeSpecifier),
+ Block(Block),
+ Global(TypeQualifier, Vec<Identifier>),
+}
+
+/// A general purpose block, containing fields and possibly a list of declared identifiers. Semantic
+/// is given with the storage qualifier.
+#[derive(Clone, Debug, PartialEq)]
+pub struct Block {
+ pub qualifier: TypeQualifier,
+ pub name: Identifier,
+ pub fields: Vec<StructFieldSpecifier>,
+ pub identifier: Option<ArrayedIdentifier>,
+}
+
+/// Function identifier.
+#[derive(Clone, Debug, PartialEq)]
+pub enum FunIdentifier {
+ Identifier(SymRef),
+ Constructor(Type),
+}
+
+/// Function prototype.
+#[derive(Clone, Debug, PartialEq)]
+pub struct FunctionPrototype {
+ pub ty: Type,
+ pub name: Identifier,
+ pub parameters: Vec<FunctionParameterDeclaration>,
+}
+
+impl FunctionPrototype {
+ pub fn has_parameter(&self, sym: SymRef) -> bool {
+ for param in &self.parameters {
+ match param {
+ FunctionParameterDeclaration::Named(_, ref d) => {
+ if d.sym == sym {
+ return true;
+ }
+ }
+ _ => {}
+ }
+ }
+ false
+ }
+}
+
+/// Function parameter declaration.
+#[derive(Clone, Debug, PartialEq)]
+pub enum FunctionParameterDeclaration {
+ Named(Option<ParameterQualifier>, FunctionParameterDeclarator),
+ Unnamed(Option<ParameterQualifier>, TypeSpecifier),
+}
+
+/// Function parameter declarator.
+#[derive(Clone, Debug, PartialEq)]
+pub struct FunctionParameterDeclarator {
+ pub ty: Type,
+ pub name: Identifier,
+ pub sym: SymRef,
+}
+
+/// Init declarator list.
+#[derive(Clone, Debug, PartialEq)]
+pub struct InitDeclaratorList {
+ // XXX it feels like separating out the type and the names is better than
+ // head and tail
+ // Also, it might be nice to separate out type definitions from name definitions
+ pub head: SingleDeclaration,
+ pub tail: Vec<SingleDeclarationNoType>,
+}
+
+/// Type qualifier.
+#[derive(Clone, Debug, PartialEq)]
+pub struct TypeQualifier {
+ pub qualifiers: NonEmpty<TypeQualifierSpec>,
+}
+
+fn lift_type_qualifier_for_declaration(
+ _state: &mut State,
+ q: &Option<syntax::TypeQualifier>,
+) -> Option<TypeQualifier> {
+ q.as_ref().and_then(|x| {
+ NonEmpty::from_non_empty_iter(x.qualifiers.0.iter().flat_map(|x| match x {
+ syntax::TypeQualifierSpec::Precision(_) => None,
+ syntax::TypeQualifierSpec::Interpolation(_) => None,
+ syntax::TypeQualifierSpec::Invariant => Some(TypeQualifierSpec::Invariant),
+ syntax::TypeQualifierSpec::Layout(l) => Some(TypeQualifierSpec::Layout(l.clone())),
+ syntax::TypeQualifierSpec::Precise => Some(TypeQualifierSpec::Precise),
+ syntax::TypeQualifierSpec::Storage(_) => None,
+ }))
+ .map(|x| TypeQualifier { qualifiers: x })
+ })
+}
+
+fn lift_type_qualifier_for_parameter(
+ _state: &mut State,
+ q: &Option<syntax::TypeQualifier>,
+) -> Option<ParameterQualifier> {
+ let mut qp: Option<ParameterQualifier> = None;
+ if let Some(q) = q {
+ for x in &q.qualifiers.0 {
+ match (&qp, x) {
+ (None, syntax::TypeQualifierSpec::Storage(s)) => match s {
+ syntax::StorageQualifier::Const => qp = Some(ParameterQualifier::Const),
+ syntax::StorageQualifier::In => qp = Some(ParameterQualifier::In),
+ syntax::StorageQualifier::Out => qp = Some(ParameterQualifier::Out),
+ syntax::StorageQualifier::InOut => qp = Some(ParameterQualifier::InOut),
+ _ => panic!("Bad storage qualifier for parameter"),
+ },
+ (_, syntax::TypeQualifierSpec::Precision(_)) => {}
+ _ => panic!("Bad parameter qualifier {:?}", x),
+ }
+ }
+ }
+ qp
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum ParameterQualifier {
+ Const,
+ In,
+ InOut,
+ Out,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum MemoryQualifier {
+ Coherent,
+ Volatile,
+ Restrict,
+ ReadOnly,
+ WriteOnly,
+}
+
+/// Type qualifier spec.
+#[derive(Clone, Debug, PartialEq)]
+pub enum TypeQualifierSpec {
+ Layout(syntax::LayoutQualifier),
+ Invariant,
+ Parameter(ParameterQualifier),
+ Memory(MemoryQualifier),
+ Precise,
+}
+
+/// Single declaration.
+#[derive(Clone, Debug, PartialEq)]
+pub struct SingleDeclaration {
+ pub ty: Type,
+ pub ty_def: Option<SymRef>,
+ pub qualifier: Option<TypeQualifier>,
+ pub name: SymRef,
+ pub initializer: Option<Initializer>,
+}
+
+/// A single declaration with implicit, already-defined type.
+#[derive(Clone, Debug, PartialEq)]
+pub struct SingleDeclarationNoType {
+ pub ident: ArrayedIdentifier,
+ pub initializer: Option<Initializer>,
+}
+
+/// Initializer.
+#[derive(Clone, Debug, PartialEq)]
+pub enum Initializer {
+ Simple(Box<Expr>),
+ List(NonEmpty<Initializer>),
+}
+
+impl From<Expr> for Initializer {
+ fn from(e: Expr) -> Self {
+ Initializer::Simple(Box::new(e))
+ }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Expr {
+ pub kind: ExprKind,
+ pub ty: Type,
+}
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub enum FieldSet {
+ Rgba,
+ Xyzw,
+ Stpq,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct SwizzleSelector {
+ pub field_set: FieldSet,
+ pub components: Vec<i8>,
+}
+
+impl SwizzleSelector {
+ fn parse(s: &str) -> Self {
+ let mut components = Vec::new();
+ let mut field_set = Vec::new();
+
+ for c in s.chars() {
+ match c {
+ 'r' => {
+ components.push(0);
+ field_set.push(FieldSet::Rgba);
+ }
+ 'x' => {
+ components.push(0);
+ field_set.push(FieldSet::Xyzw);
+ }
+ 's' => {
+ components.push(0);
+ field_set.push(FieldSet::Stpq);
+ }
+
+ 'g' => {
+ components.push(1);
+ field_set.push(FieldSet::Rgba);
+ }
+ 'y' => {
+ components.push(1);
+ field_set.push(FieldSet::Xyzw);
+ }
+ 't' => {
+ components.push(1);
+ field_set.push(FieldSet::Stpq);
+ }
+
+ 'b' => {
+ components.push(2);
+ field_set.push(FieldSet::Rgba);
+ }
+ 'z' => {
+ components.push(2);
+ field_set.push(FieldSet::Xyzw);
+ }
+ 'p' => {
+ components.push(2);
+ field_set.push(FieldSet::Stpq);
+ }
+
+ 'a' => {
+ components.push(3);
+ field_set.push(FieldSet::Rgba);
+ }
+ 'w' => {
+ components.push(3);
+ field_set.push(FieldSet::Xyzw);
+ }
+ 'q' => {
+ components.push(3);
+ field_set.push(FieldSet::Stpq);
+ }
+ _ => panic!("bad selector"),
+ }
+ }
+
+ let first = &field_set[0];
+ assert!(field_set.iter().all(|item| item == first));
+ assert!(components.len() <= 4);
+ SwizzleSelector {
+ field_set: first.clone(),
+ components,
+ }
+ }
+
+ pub fn to_field_set(&self, field_set: FieldSet) -> String {
+ let mut s = String::new();
+ let fs = match field_set {
+ FieldSet::Rgba => ['r', 'g', 'b', 'a'],
+ FieldSet::Xyzw => ['x', 'y', 'z', 'w'],
+ FieldSet::Stpq => ['s', 't', 'p', 'q'],
+ };
+ for i in &self.components {
+ s.push(fs[*i as usize])
+ }
+ s
+ }
+
+ pub fn to_string(&self) -> String {
+ self.to_field_set(self.field_set)
+ }
+}
+
+/// The most general form of an expression. As you can see if you read the variant list, in GLSL, an
+/// assignment is an expression. This is a bit silly but think of an assignment as a statement first
+/// then an expression which evaluates to what the statement “returns”.
+///
+/// An expression is either an assignment or a list (comma) of assignments.
+#[derive(Clone, Debug, PartialEq)]
+pub enum ExprKind {
+ /// A variable expression, using an identifier.
+ Variable(SymRef),
+ /// Integral constant expression.
+ IntConst(i32),
+ /// Unsigned integral constant expression.
+ UIntConst(u32),
+ /// Boolean constant expression.
+ BoolConst(bool),
+ /// Single precision floating expression.
+ FloatConst(f32),
+ /// Double precision floating expression.
+ DoubleConst(f64),
+ /// A unary expression, gathering a single expression and a unary operator.
+ Unary(UnaryOp, Box<Expr>),
+ /// A binary expression, gathering two expressions and a binary operator.
+ Binary(BinaryOp, Box<Expr>, Box<Expr>),
+ /// A ternary conditional expression, gathering three expressions.
+ Ternary(Box<Expr>, Box<Expr>, Box<Expr>),
+ /// An assignment is also an expression. Gathers an expression that defines what to assign to, an
+ /// assignment operator and the value to associate with.
+ Assignment(Box<Expr>, AssignmentOp, Box<Expr>),
+ /// Add an array specifier to an expression.
+ Bracket(Box<Expr>, Vec<Expr>),
+ /// A functional call. It has a function identifier and a list of expressions (arguments).
+ FunCall(FunIdentifier, Vec<Expr>),
+ /// An expression associated with a field selection (struct).
+ Dot(Box<Expr>, Identifier),
+ /// An expression associated with a component selection
+ SwizzleSelector(Box<Expr>, SwizzleSelector),
+ /// Post-incrementation of an expression.
+ PostInc(Box<Expr>),
+ /// Post-decrementation of an expression.
+ PostDec(Box<Expr>),
+ /// An expression that contains several, separated with comma.
+ Comma(Box<Expr>, Box<Expr>),
+ /// A temporary condition variable
+ Cond(usize, Box<Expr>),
+ CondMask,
+}
+
+/*
+impl From<i32> for Expr {
+ fn from(x: i32) -> Expr {
+ ExprKind::IntConst(x)
+ }
+}
+
+impl From<u32> for Expr {
+ fn from(x: u32) -> Expr {
+ Expr::UIntConst(x)
+ }
+}
+
+impl From<bool> for Expr {
+ fn from(x: bool) -> Expr {
+ Expr::BoolConst(x)
+ }
+}
+
+impl From<f32> for Expr {
+ fn from(x: f32) -> Expr {
+ Expr::FloatConst(x)
+ }
+}
+
+impl From<f64> for Expr {
+ fn from(x: f64) -> Expr {
+ Expr::DoubleConst(x)
+ }
+}
+*/
+/// Starting rule.
+#[derive(Clone, Debug, PartialEq)]
+pub struct TranslationUnit(pub NonEmpty<ExternalDeclaration>);
+
+impl TranslationUnit {
+ /// Construct a translation unit from an iterator.
+ ///
+ /// # Errors
+ ///
+ /// `None` if the iterator yields no value.
+ pub fn from_iter<I>(iter: I) -> Option<Self>
+ where
+ I: IntoIterator<Item = ExternalDeclaration>,
+ {
+ NonEmpty::from_non_empty_iter(iter).map(TranslationUnit)
+ }
+}
+
+impl Deref for TranslationUnit {
+ type Target = NonEmpty<ExternalDeclaration>;
+
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl DerefMut for TranslationUnit {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut self.0
+ }
+}
+
+impl IntoIterator for TranslationUnit {
+ type IntoIter = <NonEmpty<ExternalDeclaration> as IntoIterator>::IntoIter;
+ type Item = ExternalDeclaration;
+
+ fn into_iter(self) -> Self::IntoIter {
+ self.0.into_iter()
+ }
+}
+
+impl<'a> IntoIterator for &'a TranslationUnit {
+ type IntoIter = <&'a NonEmpty<ExternalDeclaration> as IntoIterator>::IntoIter;
+ type Item = &'a ExternalDeclaration;
+
+ fn into_iter(self) -> Self::IntoIter {
+ (&self.0).into_iter()
+ }
+}
+
+impl<'a> IntoIterator for &'a mut TranslationUnit {
+ type IntoIter = <&'a mut NonEmpty<ExternalDeclaration> as IntoIterator>::IntoIter;
+ type Item = &'a mut ExternalDeclaration;
+
+ fn into_iter(self) -> Self::IntoIter {
+ (&mut self.0).into_iter()
+ }
+}
+
+/// External declaration.
+#[derive(Clone, Debug, PartialEq)]
+pub enum ExternalDeclaration {
+ Preprocessor(syntax::Preprocessor),
+ FunctionDefinition(Rc<FunctionDefinition>),
+ Declaration(Declaration),
+}
+
+/// Function definition.
+#[derive(Clone, Debug, PartialEq)]
+pub struct FunctionDefinition {
+ pub prototype: FunctionPrototype,
+ pub body: CompoundStatement,
+ pub globals: Vec<SymRef>,
+ pub texel_fetches: HashMap<(SymRef, SymRef), TexelFetchOffsets>,
+}
+
+/// Compound statement (with no new scope).
+#[derive(Clone, Debug, PartialEq)]
+pub struct CompoundStatement {
+ pub statement_list: Vec<Statement>,
+}
+
+impl CompoundStatement {
+ pub fn new() -> Self {
+ CompoundStatement {
+ statement_list: Vec::new(),
+ }
+ }
+}
+
+impl FromIterator<Statement> for CompoundStatement {
+ fn from_iter<T>(iter: T) -> Self
+ where
+ T: IntoIterator<Item = Statement>,
+ {
+ CompoundStatement {
+ statement_list: iter.into_iter().collect(),
+ }
+ }
+}
+
+/// Statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum Statement {
+ Compound(Box<CompoundStatement>),
+ Simple(Box<SimpleStatement>),
+}
+
+/// Simple statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum SimpleStatement {
+ Declaration(Declaration),
+ Expression(ExprStatement),
+ Selection(SelectionStatement),
+ Switch(SwitchStatement),
+ Iteration(IterationStatement),
+ Jump(JumpStatement),
+}
+
+impl SimpleStatement {
+ /// Create a new expression statement.
+ pub fn new_expr<E>(expr: E) -> Self
+ where
+ E: Into<Expr>,
+ {
+ SimpleStatement::Expression(Some(expr.into()))
+ }
+
+ /// Create a new selection statement (if / else).
+ pub fn new_if_else<If, True, False>(ife: If, truee: True, falsee: False) -> Self
+ where
+ If: Into<Expr>,
+ True: Into<Statement>,
+ False: Into<Statement>,
+ {
+ SimpleStatement::Selection(SelectionStatement {
+ cond: Box::new(ife.into()),
+ body: Box::new(truee.into()),
+ else_stmt: Some(Box::new(falsee.into())),
+ })
+ }
+
+ /// Create a new while statement.
+ pub fn new_while<C, S>(cond: C, body: S) -> Self
+ where
+ C: Into<Condition>,
+ S: Into<Statement>,
+ {
+ SimpleStatement::Iteration(IterationStatement::While(
+ cond.into(),
+ Box::new(body.into()),
+ ))
+ }
+
+ /// Create a new do-while statement.
+ pub fn new_do_while<C, S>(body: S, cond: C) -> Self
+ where
+ S: Into<Statement>,
+ C: Into<Expr>,
+ {
+ SimpleStatement::Iteration(IterationStatement::DoWhile(
+ Box::new(body.into()),
+ Box::new(cond.into()),
+ ))
+ }
+}
+
+/// Expression statement.
+pub type ExprStatement = Option<Expr>;
+
+/// Selection statement.
+#[derive(Clone, Debug, PartialEq)]
+pub struct SelectionStatement {
+ pub cond: Box<Expr>,
+ pub body: Box<Statement>,
+ // the else branch
+ pub else_stmt: Option<Box<Statement>>,
+}
+
+/// Condition.
+#[derive(Clone, Debug, PartialEq)]
+pub enum Condition {
+ Expr(Box<Expr>),
+}
+
+impl From<Expr> for Condition {
+ fn from(expr: Expr) -> Self {
+ Condition::Expr(Box::new(expr))
+ }
+}
+
+/// Switch statement.
+#[derive(Clone, Debug, PartialEq)]
+pub struct SwitchStatement {
+ pub head: Box<Expr>,
+ pub cases: Vec<Case>,
+}
+
+/// Case label statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum CaseLabel {
+ Case(Box<Expr>),
+ Def,
+}
+
+/// An individual case
+#[derive(Clone, Debug, PartialEq)]
+pub struct Case {
+ pub label: CaseLabel,
+ pub stmts: Vec<Statement>,
+}
+
+/// Iteration statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum IterationStatement {
+ While(Condition, Box<Statement>),
+ DoWhile(Box<Statement>, Box<Expr>),
+ For(ForInitStatement, ForRestStatement, Box<Statement>),
+}
+
+/// For init statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum ForInitStatement {
+ Expression(Option<Expr>),
+ Declaration(Box<Declaration>),
+}
+
+/// For init statement.
+#[derive(Clone, Debug, PartialEq)]
+pub struct ForRestStatement {
+ pub condition: Option<Condition>,
+ pub post_expr: Option<Box<Expr>>,
+}
+
+/// Jump statement.
+#[derive(Clone, Debug, PartialEq)]
+pub enum JumpStatement {
+ Continue,
+ Break,
+ Return(Option<Box<Expr>>),
+ Discard,
+}
+
+trait NonEmptyExt<T> {
+ fn map<U, F: FnMut(&mut State, &T) -> U>(&self, s: &mut State, f: F) -> NonEmpty<U>;
+ fn new(x: T) -> NonEmpty<T>;
+}
+
+impl<T> NonEmptyExt<T> for NonEmpty<T> {
+ fn map<U, F: FnMut(&mut State, &T) -> U>(&self, s: &mut State, mut f: F) -> NonEmpty<U> {
+ NonEmpty::from_non_empty_iter(self.into_iter().map(|x| f(s, &x))).unwrap()
+ }
+ fn new(x: T) -> NonEmpty<T> {
+ NonEmpty::from_non_empty_iter(vec![x].into_iter()).unwrap()
+ }
+}
+
+fn translate_initializater(state: &mut State, i: &syntax::Initializer) -> Initializer {
+ match i {
+ syntax::Initializer::Simple(i) => {
+ Initializer::Simple(Box::new(translate_expression(state, i)))
+ }
+ _ => panic!(),
+ }
+}
+
+fn translate_struct_declaration(state: &mut State, d: &syntax::SingleDeclaration) -> Declaration {
+ let ty = d.ty.clone();
+ let ty_def = match &ty.ty.ty {
+ TypeSpecifierNonArray::Struct(s) => {
+ let decl = SymDecl::Struct(lift(state, s));
+ Some(state.declare(s.name.as_ref().unwrap().as_str(), decl))
+ }
+ _ => None,
+ };
+
+ let ty_def = ty_def.expect("Must be type definition");
+
+ Declaration::StructDefinition(ty_def)
+}
+
+fn get_expr_index(e: &syntax::Expr) -> i32 {
+ match e {
+ syntax::Expr::IntConst(i) => *i,
+ syntax::Expr::UIntConst(u) => *u as i32,
+ syntax::Expr::FloatConst(f) => *f as i32,
+ syntax::Expr::DoubleConst(f) => *f as i32,
+ _ => panic!(),
+ }
+}
+
+fn translate_variable_declaration(
+ state: &mut State,
+ d: &syntax::InitDeclaratorList,
+ default_run_class: RunClass,
+) -> Declaration {
+ let mut ty = d.head.ty.clone();
+ ty.ty.array_specifier = d.head.array_specifier.clone();
+ let ty_def = match &ty.ty.ty {
+ TypeSpecifierNonArray::Struct(s) => {
+ let decl = SymDecl::Struct(lift(state, s));
+ Some(state.declare(s.name.as_ref().unwrap().as_str(), decl))
+ }
+ _ => None,
+ };
+
+ let mut ty: Type = lift(state, &d.head.ty);
+ if let Some(array) = &d.head.array_specifier {
+ ty.array_sizes = Some(Box::new(lift(state, array)))
+ }
+
+ let (sym, decl) = match d.head.name.as_ref() {
+ Some(name) => {
+ let mut storage = StorageClass::None;
+ let mut interpolation = None;
+ for qual in d
+ .head
+ .ty
+ .qualifier
+ .iter()
+ .flat_map(|x| x.qualifiers.0.iter())
+ {
+ match qual {
+ syntax::TypeQualifierSpec::Storage(s) => match (&storage, s) {
+ (StorageClass::FragColor(..), syntax::StorageQualifier::Out) => {}
+ (StorageClass::Sampler(..), syntax::StorageQualifier::Uniform) => {}
+ (StorageClass::None, syntax::StorageQualifier::Out) => {
+ storage = StorageClass::Out;
+ }
+ (StorageClass::None, syntax::StorageQualifier::In) => {
+ storage = StorageClass::In;
+ }
+ (StorageClass::None, syntax::StorageQualifier::Uniform) => {
+ if ty.kind.is_sampler() {
+ storage = StorageClass::Sampler(SamplerFormat::Unknown);
+ } else {
+ storage = StorageClass::Uniform;
+ }
+ }
+ (StorageClass::None, syntax::StorageQualifier::Const) => {
+ storage = StorageClass::Const;
+ }
+ _ => panic!("bad storage {:?}", (storage, s)),
+ },
+ syntax::TypeQualifierSpec::Interpolation(i) => match (&interpolation, i) {
+ (None, i) => interpolation = Some(i.clone()),
+ _ => panic!("multiple interpolation"),
+ },
+ syntax::TypeQualifierSpec::Layout(l) => {
+ let mut loc = -1;
+ let mut index = -1;
+ for id in &l.ids {
+ match id {
+ syntax::LayoutQualifierSpec::Identifier(ref key, None) => {
+ match key.as_str() {
+ "rgba8" => {
+ storage = StorageClass::Sampler(SamplerFormat::RGBA8);
+ }
+ "rgba32f" => {
+ storage = StorageClass::Sampler(SamplerFormat::RGBA32F);
+ }
+ "rgba32i" => {
+ storage = StorageClass::Sampler(SamplerFormat::RGBA32I);
+ }
+ "r8" => {
+ storage = StorageClass::Sampler(SamplerFormat::R8);
+ }
+ "rg8" => {
+ storage = StorageClass::Sampler(SamplerFormat::RG8);
+ }
+ _ => {}
+ }
+ }
+ syntax::LayoutQualifierSpec::Identifier(ref key, Some(ref e)) => {
+ match key.as_str() {
+ "location" => {
+ loc = get_expr_index(e);
+ }
+ "index" => {
+ index = get_expr_index(e);
+ }
+ _ => {}
+ }
+ }
+ _ => {}
+ }
+ }
+ if index >= 0 {
+ assert!(loc == 0);
+ assert!(index <= 1);
+ assert!(storage == StorageClass::None);
+ storage = StorageClass::FragColor(index);
+ }
+ }
+ _ => {}
+ }
+ }
+ let decl = if state.in_function.is_some() {
+ let run_class = match storage {
+ StorageClass::Const => RunClass::Scalar,
+ StorageClass::None => default_run_class,
+ _ => panic!("bad local storage {:?}", storage),
+ };
+ SymDecl::Local(storage, ty.clone(), run_class)
+ } else {
+ let run_class = match storage {
+ StorageClass::Const | StorageClass::Uniform | StorageClass::Sampler(..) => {
+ RunClass::Scalar
+ }
+ StorageClass::In | StorageClass::Out | StorageClass::FragColor(..)
+ if interpolation == Some(syntax::InterpolationQualifier::Flat) =>
+ {
+ RunClass::Scalar
+ }
+ _ => RunClass::Vector,
+ };
+ SymDecl::Global(storage, interpolation, ty.clone(), run_class)
+ };
+ (state.declare(name.as_str(), decl.clone()), decl)
+ }
+ None => panic!(),
+ };
+
+ let head = SingleDeclaration {
+ qualifier: lift_type_qualifier_for_declaration(state, &d.head.ty.qualifier),
+ name: sym,
+ ty,
+ ty_def,
+ initializer: d
+ .head
+ .initializer
+ .as_ref()
+ .map(|x| translate_initializater(state, x)),
+ };
+
+ let tail = d
+ .tail
+ .iter()
+ .map(|d| {
+ if let Some(_array) = &d.ident.array_spec {
+ panic!("unhandled array")
+ }
+ state.declare(d.ident.ident.as_str(), decl.clone());
+ SingleDeclarationNoType {
+ ident: d.ident.clone(),
+ initializer: d
+ .initializer
+ .as_ref()
+ .map(|x| translate_initializater(state, x)),
+ }
+ })
+ .collect();
+ Declaration::InitDeclaratorList(InitDeclaratorList { head, tail })
+}
+
+fn translate_init_declarator_list(
+ state: &mut State,
+ l: &syntax::InitDeclaratorList,
+ default_run_class: RunClass,
+) -> Declaration {
+ match &l.head.name {
+ Some(_name) => translate_variable_declaration(state, l, default_run_class),
+ None => translate_struct_declaration(state, &l.head),
+ }
+}
+
+fn translate_declaration(
+ state: &mut State,
+ d: &syntax::Declaration,
+ default_run_class: RunClass,
+) -> Declaration {
+ match d {
+ syntax::Declaration::Block(_) => panic!(), //Declaration::Block(..),
+ syntax::Declaration::FunctionPrototype(p) => {
+ Declaration::FunctionPrototype(translate_function_prototype(state, p))
+ }
+ syntax::Declaration::Global(ty, ids) => {
+ // glsl non-es supports requalifying variables, but we don't yet.
+ // However, we still want to allow global layout qualifiers for
+ // KHR_advanced_blend_equation.
+ if !ids.is_empty() {
+ panic!();
+ }
+ let _ = for qual in &ty.qualifiers {
+ match qual {
+ syntax::TypeQualifierSpec::Layout(l) => {
+ for id in &l.ids {
+ match id {
+ syntax::LayoutQualifierSpec::Identifier(key, _) => {
+ match key.as_str() {
+ "blend_support_all_equations" => (),
+ _ => panic!(),
+ }
+ }
+ _ => panic!(),
+ }
+ }
+ }
+ syntax::TypeQualifierSpec::Storage(syntax::StorageQualifier::Out) => (),
+ _ => panic!(),
+ }
+ };
+ Declaration::Global(lift_type_qualifier_for_declaration(state, &Some(ty.clone())).unwrap(), ids.clone())
+ }
+ syntax::Declaration::InitDeclaratorList(dl) => {
+ translate_init_declarator_list(state, dl, default_run_class)
+ }
+ syntax::Declaration::Precision(p, ts) => Declaration::Precision(p.clone(), ts.clone()),
+ }
+}
+
+fn is_vector(ty: &Type) -> bool {
+ match ty.kind {
+ TypeKind::Vec2
+ | TypeKind::Vec3
+ | TypeKind::Vec4
+ | TypeKind::BVec2
+ | TypeKind::BVec3
+ | TypeKind::BVec4
+ | TypeKind::IVec2
+ | TypeKind::IVec3
+ | TypeKind::IVec4 => ty.array_sizes == None,
+ _ => false,
+ }
+}
+
+fn index_vector(ty: &Type) -> Option<TypeKind> {
+ use TypeKind::*;
+ if ty.array_sizes != None {
+ return None;
+ }
+ Some(match ty.kind {
+ Vec2 => Float,
+ Vec3 => Float,
+ Vec4 => Float,
+ DVec2 => Double,
+ DVec3 => Double,
+ DVec4 => Double,
+ BVec2 => Bool,
+ BVec3 => Bool,
+ BVec4 => Bool,
+ IVec2 => Int,
+ IVec3 => Int,
+ IVec4 => Int,
+ UVec2 => UInt,
+ UVec3 => UInt,
+ UVec4 => UInt,
+ _ => return None,
+ })
+
+}
+
+fn index_matrix(ty: &Type) -> Option<TypeKind> {
+ use TypeKind::*;
+ if ty.array_sizes != None {
+ return None;
+ }
+ Some(match ty.kind {
+ Mat2 => Vec2,
+ Mat3 => Vec3,
+ Mat4 => Vec4,
+ Mat23 => Vec3,
+ Mat24 => Vec4,
+ Mat32 => Vec2,
+ Mat34 => Vec4,
+ Mat42 => Vec2,
+ Mat43 => Vec3,
+ DMat2 => DVec2,
+ DMat3 => DVec3,
+ DMat4 => DVec4,
+ DMat23 => DVec3,
+ DMat24 => DVec4,
+ DMat32 => DVec2,
+ DMat34 => DVec4,
+ DMat42 => DVec2,
+ DMat43 => DVec3,
+ _ => return None,
+ })
+}
+
+fn is_ivec(ty: &Type) -> bool {
+ match ty.kind {
+ TypeKind::IVec2 | TypeKind::IVec3 | TypeKind::IVec4 => ty.array_sizes == None,
+ _ => false,
+ }
+}
+
+fn can_implicitly_convert_to(src: &Type, dst: &Type) -> bool {
+ // XXX: use an underlying type helper
+ if src == &Type::new(TypeKind::Double) && dst == &Type::new(TypeKind::Float) {
+ // We're not supposed to implicitly convert from double to float but glsl 4 has a bug
+ // where it parses unannotated float constants as double.
+ true
+ } else if dst == &Type::new(TypeKind::Double) && src == &Type::new(TypeKind::Float) {
+ true
+ } else if (dst == &Type::new(TypeKind::Float) || dst == &Type::new(TypeKind::Double)) &&
+ src == &Type::new(TypeKind::Int)
+ {
+ true
+ } else if (dst == &Type::new(TypeKind::Vec2) || dst == &Type::new(TypeKind::DVec2)) &&
+ src == &Type::new(TypeKind::IVec2)
+ {
+ true
+ } else if dst == &Type::new(TypeKind::IVec2) &&
+ (src == &Type::new(TypeKind::Vec2) || src == &Type::new(TypeKind::DVec2))
+ {
+ true
+ } else {
+ src.kind == dst.kind && src.array_sizes == dst.array_sizes
+ }
+}
+
+fn promoted_type(lhs: &Type, rhs: &Type) -> Type {
+ if lhs == &Type::new(TypeKind::Double) && rhs == &Type::new(TypeKind::Float) {
+ Type::new(TypeKind::Double)
+ } else if lhs == &Type::new(TypeKind::Float) && rhs == &Type::new(TypeKind::Double) {
+ Type::new(TypeKind::Double)
+ } else if lhs == &Type::new(TypeKind::Int) && rhs == &Type::new(TypeKind::Double) {
+ Type::new(TypeKind::Double)
+ } else if is_vector(&lhs) &&
+ (rhs == &Type::new(TypeKind::Float) ||
+ rhs == &Type::new(TypeKind::Double) ||
+ rhs == &Type::new(TypeKind::Int))
+ {
+ // scalars promote to vectors
+ lhs.clone()
+ } else if is_vector(&rhs) &&
+ (lhs == &Type::new(TypeKind::Float) ||
+ lhs == &Type::new(TypeKind::Double) ||
+ lhs == &Type::new(TypeKind::Int))
+ {
+ // scalars promote to vectors
+ rhs.clone()
+ } else if lhs == rhs {
+ lhs.clone()
+ } else if lhs.kind == rhs.kind {
+ if lhs.array_sizes == rhs.array_sizes {
+ // XXX: we need to be able to query the default precision here
+ match (&lhs.precision, &rhs.precision) {
+ (Some(PrecisionQualifier::High), _) => lhs.clone(),
+ (_, Some(PrecisionQualifier::High)) => rhs.clone(),
+ (None, _) => lhs.clone(),
+ (_, None) => rhs.clone(),
+ _ => panic!("precision mismatch {:?} {:?}", lhs.precision, rhs.precision),
+ }
+ } else {
+ panic!("array size mismatch")
+ }
+ } else {
+ assert_eq!(lhs, rhs);
+ lhs.clone()
+ }
+}
+
+pub fn is_output(expr: &Expr, state: &State) -> Option<SymRef> {
+ match &expr.kind {
+ ExprKind::Variable(i) => match state.sym(*i).decl {
+ SymDecl::Global(storage, ..) => match storage {
+ StorageClass::In | StorageClass::Out => return Some(*i),
+ _ => {}
+ },
+ SymDecl::Local(..) => {}
+ _ => panic!("should be variable"),
+ },
+ ExprKind::SwizzleSelector(e, ..) => {
+ return is_output(e, state);
+ }
+ ExprKind::Bracket(e, ..) => {
+ return is_output(e, state);
+ }
+ ExprKind::Dot(e, ..) => {
+ return is_output(e, state);
+ }
+ _ => {}
+ };
+ None
+}
+
+pub fn get_texel_fetch_offset(
+ state: &State,
+ sampler_expr: &Expr,
+ uv_expr: &Expr,
+ offset_expr: &Expr,
+) -> Option<(SymRef, SymRef, i32, i32)> {
+ if let ExprKind::Variable(ref sampler) = &sampler_expr.kind {
+ //if let ExprKind::Binary(BinaryOp::Add, ref lhs, ref rhs) = &uv_expr.kind {
+ if let ExprKind::Variable(ref base) = &uv_expr.kind {
+ if let ExprKind::FunCall(ref fun, ref args) = &offset_expr.kind {
+ if let FunIdentifier::Identifier(ref offset) = fun {
+ if state.sym(*offset).name == "ivec2" {
+ if let ExprKind::IntConst(ref x) = &args[0].kind {
+ if let ExprKind::IntConst(ref y) = &args[1].kind {
+ return Some((*sampler, *base, *x, *y));
+ }
+ }
+ }
+ }
+ }
+ }
+ //}
+ }
+ None
+}
+
+fn make_const(t: TypeKind, v: i32) -> Expr {
+ Expr {
+ kind: match t {
+ TypeKind::Int => ExprKind::IntConst(v as _),
+ TypeKind::UInt => ExprKind::UIntConst(v as _),
+ TypeKind::Bool => ExprKind::BoolConst(v != 0),
+ TypeKind::Float => ExprKind::FloatConst(v as _),
+ TypeKind::Double => ExprKind::DoubleConst(v as _),
+ _ => panic!("bad constant type"),
+ },
+ ty: Type::new(t),
+ }
+}
+
+// Any parameters needing to convert to bool should just compare via != 0.
+// This ensures they get the proper all-1s pattern for C++ OpenCL vectors.
+fn force_params_to_bool(_state: &mut State, params: &mut Vec<Expr>) {
+ for e in params {
+ if !e.ty.kind.is_bool() {
+ let k = e.ty.kind;
+ *e = Expr {
+ kind: ExprKind::Binary(
+ BinaryOp::NonEqual,
+ Box::new(e.clone()),
+ Box::new(make_const(k.to_scalar(), 0)),
+ ),
+ ty: Type::new(k.to_bool()),
+ };
+ }
+ }
+}
+
+// Transform bool params to int, then mask off the low bit so they become 0 or 1.
+// C++ OpenCL vectors represent bool as all-1s patterns, which will erroneously
+// convert to -1 otherwise.
+fn force_params_from_bool(state: &mut State, params: &mut Vec<Expr>) {
+ for e in params {
+ if e.ty.kind.is_bool() {
+ let k = e.ty.kind.to_int();
+ let sym = state.lookup(k.glsl_primitive_type_name().unwrap()).unwrap();
+ *e = Expr {
+ kind: ExprKind::Binary(
+ BinaryOp::BitAnd,
+ Box::new(Expr {
+ kind: ExprKind::FunCall(
+ FunIdentifier::Identifier(sym),
+ vec![e.clone()],
+ ),
+ ty: Type::new(k),
+ }),
+ Box::new(make_const(TypeKind::Int, 1)),
+ ),
+ ty: Type::new(k),
+ };
+ }
+ }
+}
+
+fn translate_expression(state: &mut State, e: &syntax::Expr) -> Expr {
+ match e {
+ syntax::Expr::Variable(i) => {
+ let sym = match state.lookup(i.as_str()) {
+ Some(sym) => sym,
+ None => panic!("missing declaration {}", i.as_str()),
+ };
+ let ty = match &state.sym(sym).decl {
+ SymDecl::Global(_, _, ty, _) => {
+ let mut globals = state.used_globals.borrow_mut();
+ if !globals.contains(&sym) {
+ globals.push(sym);
+ }
+ ty.clone()
+ }
+ SymDecl::Local(_, ty, _) => ty.clone(),
+ _ => panic!("bad variable type"),
+ };
+ Expr {
+ kind: ExprKind::Variable(sym),
+ ty,
+ }
+ }
+ syntax::Expr::Assignment(lhs, op, rhs) => {
+ let lhs = Box::new(translate_expression(state, lhs));
+ let rhs = Box::new(translate_expression(state, rhs));
+ let ty = if op == &AssignmentOp::Mult {
+ if lhs.ty.kind == TypeKind::Vec4 && rhs.ty.kind == TypeKind::Float {
+ lhs.ty.clone()
+ } else {
+ promoted_type(&lhs.ty, &rhs.ty)
+ }
+ } else {
+ promoted_type(&lhs.ty, &rhs.ty)
+ };
+ if let Some(global) = is_output(&lhs, state) {
+ let mut globals = state.modified_globals.borrow_mut();
+ if !globals.contains(&global) {
+ globals.push(global);
+ }
+ if global == state.clip_dist_sym {
+ if let ExprKind::Bracket(_, idx) = &lhs.kind {
+ // Get the constant array index used for gl_ClipDistance and add it to the used mask.
+ for dimension in idx {
+ let idx = match dimension.kind {
+ ExprKind::IntConst(idx) => idx,
+ ExprKind::UIntConst(idx) => idx as i32,
+ _ => panic!("bad index for gl_ClipDistance"),
+ };
+ assert!(idx >= 0 && idx < 4);
+ state.used_clip_dist |= 1 << idx;
+ }
+ }
+ }
+ }
+ Expr {
+ kind: ExprKind::Assignment(lhs, op.clone(), rhs),
+ ty,
+ }
+ }
+ syntax::Expr::Binary(op, lhs, rhs) => {
+ let lhs = Box::new(translate_expression(state, lhs));
+ let rhs = Box::new(translate_expression(state, rhs));
+ let ty = match op {
+ BinaryOp::Equal | BinaryOp::NonEqual | BinaryOp::GT | BinaryOp::GTE | BinaryOp::LT | BinaryOp::LTE => {
+ // comparison operators have a bool result
+ Type::new(TypeKind::Bool)
+ }
+ BinaryOp::Mult => {
+ match (lhs.ty.kind, rhs.ty.kind) {
+ (TypeKind::Mat2, TypeKind::Vec2) |
+ (TypeKind::Mat3, TypeKind::Vec3) |
+ (TypeKind::Mat3, TypeKind::Mat3) |
+ (TypeKind::Mat3, TypeKind::Mat43) |
+ (TypeKind::Mat4, TypeKind::Vec4) => rhs.ty.clone(),
+ (TypeKind::Mat43, TypeKind::Vec4) => Type::new(TypeKind::Vec3),
+ (TypeKind::Mat2, TypeKind::Float) |
+ (TypeKind::Mat3, TypeKind::Float) |
+ (TypeKind::Mat4, TypeKind::Float) => lhs.ty.clone(),
+ _ => promoted_type(&lhs.ty, &rhs.ty),
+ }
+ }
+ _ => promoted_type(&lhs.ty, &rhs.ty),
+ };
+
+ Expr {
+ kind: ExprKind::Binary(op.clone(), lhs, rhs),
+ ty,
+ }
+ }
+ syntax::Expr::Unary(op, e) => {
+ let e = Box::new(translate_expression(state, e));
+ let ty = e.ty.clone();
+ Expr {
+ kind: ExprKind::Unary(op.clone(), e),
+ ty,
+ }
+ }
+ syntax::Expr::BoolConst(b) => Expr {
+ kind: ExprKind::BoolConst(*b),
+ ty: Type::new(TypeKind::Bool),
+ },
+ syntax::Expr::Comma(lhs, rhs) => {
+ let lhs = Box::new(translate_expression(state, lhs));
+ let rhs = Box::new(translate_expression(state, rhs));
+ assert_eq!(lhs.ty, rhs.ty);
+ let ty = lhs.ty.clone();
+ Expr {
+ kind: ExprKind::Comma(lhs, rhs),
+ ty,
+ }
+ }
+ syntax::Expr::DoubleConst(d) => Expr {
+ kind: ExprKind::DoubleConst(*d),
+ ty: Type::new(TypeKind::Double),
+ },
+ syntax::Expr::FloatConst(f) => Expr {
+ kind: ExprKind::FloatConst(*f),
+ ty: Type::new(TypeKind::Float),
+ },
+ syntax::Expr::FunCall(fun, params) => {
+ let ret_ty: Type;
+ let mut params: Vec<Expr> = params
+ .iter()
+ .map(|x| translate_expression(state, x))
+ .collect();
+ Expr {
+ kind: ExprKind::FunCall(
+ match fun {
+ syntax::FunIdentifier::Identifier(i) => {
+ let name = i.as_str();
+ if name == "texelFetchOffset" && params.len() >= 4 {
+ if let Some((sampler, base, x, y)) = get_texel_fetch_offset(
+ state, &params[0], &params[1], &params[3],
+ ) {
+ if let Some(offsets) =
+ state.texel_fetches.get_mut(&(sampler, base))
+ {
+ offsets.add_offset(x, y);
+ } else {
+ state
+ .texel_fetches
+ .insert((sampler, base), TexelFetchOffsets::new(x, y));
+ }
+ }
+ } else if name == "swgl_stepInterp" {
+ let mut globals = state.modified_globals.borrow_mut();
+ for (i, sym) in state.syms.iter().enumerate() {
+ match &sym.borrow().decl {
+ SymDecl::Global(StorageClass::In, _, _, RunClass::Vector) => {
+ let symref = SymRef(i as u32);
+ if !globals.contains(&symref) {
+ globals.push(symref);
+ }
+ }
+ _ => {}
+ }
+ }
+ }
+ let sym = match state.lookup(name) {
+ Some(s) => s,
+ None => panic!("missing symbol {}", name),
+ };
+ // Force any boolean basic type constructors to generate correct
+ // bit patterns.
+ if let Some(t) = TypeKind::from_glsl_primitive_type_name(name) {
+ if t.is_bool() {
+ force_params_to_bool(state, &mut params);
+ } else {
+ force_params_from_bool(state, &mut params);
+ }
+ }
+ match &state.sym(sym).decl {
+ SymDecl::NativeFunction(fn_ty, _, _) => {
+ // Search for a signature where all parameter types are
+ // compatible. If there are many compatible signatures,
+ // then choose the one with the most exact matches.
+ // This is an approximation of the algorith described in
+ // the "Function Definitions" section of the spec.
+ let mut ret = None;
+ let mut best_score = 0;
+ 'next_sig: for sig in &fn_ty.signatures {
+ let mut score = 0;
+ for (e, p) in params.iter().zip(sig.params.iter()) {
+ if e.ty == *p {
+ score += 1;
+ } else if !can_implicitly_convert_to(&e.ty, p) {
+ continue 'next_sig;
+ }
+ }
+ if score >= best_score {
+ ret = Some(sig.ret.clone());
+ best_score = score;
+ // If all parameters match exactly, then there
+ // is no need to search for other matches.
+ if best_score >= params.len() {
+ break;
+ }
+ }
+ }
+ ret_ty = match ret {
+ Some(t) => t,
+ None => {
+ dbg!(&fn_ty.signatures);
+ dbg!(params.iter().map(|p| p).collect::<Vec<_>>());
+ panic!("no matching func {}", i.as_str())
+ }
+ };
+ }
+ SymDecl::UserFunction(fd, _) => {
+ let mut globals = state.modified_globals.borrow_mut();
+ for global in &fd.globals {
+ if !globals.contains(global) {
+ globals.push(*global);
+ }
+ }
+ let mut matching = true;
+ for (e, p) in params.iter().zip(fd.prototype.parameters.iter())
+ {
+ matching &= match p {
+ FunctionParameterDeclaration::Named(q, d) => {
+ match q {
+ Some(ParameterQualifier::InOut)
+ | Some(ParameterQualifier::Out) => {
+ if let Some(global) = is_output(e, state) {
+ if !globals.contains(&global) {
+ globals.push(global);
+ }
+ }
+ }
+ _ => {}
+ }
+ can_implicitly_convert_to(&e.ty, &d.ty)
+ }
+ FunctionParameterDeclaration::Unnamed(..) => panic!(),
+ };
+ }
+ assert!(matching);
+ ret_ty = fd.prototype.ty.clone();
+ }
+ SymDecl::Struct(_) => ret_ty = Type::new(TypeKind::Struct(sym)),
+ _ => panic!("can only call functions"),
+ };
+ FunIdentifier::Identifier(sym)
+ }
+ // array constructor
+ syntax::FunIdentifier::Expr(e) => {
+ let ty = match &**e {
+ syntax::Expr::Bracket(i, array) => {
+ let kind = match &**i {
+ syntax::Expr::Variable(i) => match i.as_str() {
+ "vec4" => TypeKind::Vec4,
+ "vec2" => TypeKind::Vec2,
+ "int" => TypeKind::Int,
+ _ => panic!("unexpected type constructor {:?}", i),
+ },
+ _ => panic!(),
+ };
+
+ Type {
+ kind,
+ precision: None,
+ array_sizes: Some(Box::new(lift(state, array))),
+ }
+ }
+ _ => panic!(),
+ };
+ ret_ty = ty.clone();
+
+ FunIdentifier::Constructor(ty)
+ }
+ },
+ params,
+ ),
+ ty: ret_ty,
+ }
+ }
+ syntax::Expr::IntConst(i) => Expr {
+ kind: ExprKind::IntConst(*i),
+ ty: Type::new(TypeKind::Int),
+ },
+ syntax::Expr::UIntConst(u) => Expr {
+ kind: ExprKind::UIntConst(*u),
+ ty: Type::new(TypeKind::UInt),
+ },
+ syntax::Expr::PostDec(e) => {
+ let e = Box::new(translate_expression(state, e));
+ let ty = e.ty.clone();
+ Expr {
+ kind: ExprKind::PostDec(e),
+ ty,
+ }
+ }
+ syntax::Expr::PostInc(e) => {
+ let e = Box::new(translate_expression(state, e));
+ let ty = e.ty.clone();
+ Expr {
+ kind: ExprKind::PostInc(e),
+ ty,
+ }
+ }
+ syntax::Expr::Ternary(cond, lhs, rhs) => {
+ let cond = Box::new(translate_expression(state, cond));
+ let lhs = Box::new(translate_expression(state, lhs));
+ let rhs = Box::new(translate_expression(state, rhs));
+ let ty = promoted_type(&lhs.ty, &rhs.ty);
+ Expr {
+ kind: ExprKind::Ternary(cond, lhs, rhs),
+ ty,
+ }
+ }
+ syntax::Expr::Dot(e, i) => {
+ let e = Box::new(translate_expression(state, e));
+ let ty = e.ty.clone();
+ let ivec = is_ivec(&ty);
+ if is_vector(&ty) {
+ let ty = Type::new(match i.as_str().len() {
+ 1 => {
+ if ivec {
+ TypeKind::Int
+ } else {
+ TypeKind::Float
+ }
+ }
+ 2 => {
+ if ivec {
+ TypeKind::IVec2
+ } else {
+ TypeKind::Vec2
+ }
+ }
+ 3 => {
+ if ivec {
+ TypeKind::IVec3
+ } else {
+ TypeKind::Vec3
+ }
+ }
+ 4 => {
+ if ivec {
+ TypeKind::IVec4
+ } else {
+ TypeKind::Vec4
+ }
+ }
+ _ => panic!(),
+ });
+
+ let sel = SwizzleSelector::parse(i.as_str());
+
+ Expr {
+ kind: ExprKind::SwizzleSelector(e, sel),
+ ty,
+ }
+ } else {
+ match ty.kind {
+ TypeKind::Struct(s) => {
+ let sym = state.sym(s);
+ let fields = match &sym.decl {
+ SymDecl::Struct(fields) => fields,
+ _ => panic!("expected struct"),
+ };
+ let field = fields
+ .fields
+ .iter()
+ .find(|x| &x.name == i)
+ .expect(&format!("missing field `{}` in `{}`", i, sym.name));
+ Expr {
+ kind: ExprKind::Dot(e, i.clone()),
+ ty: field.ty.clone(),
+ }
+ }
+ _ => panic!("expected struct found {:#?} {:#?}", e, ty),
+ }
+ }
+ }
+ syntax::Expr::Bracket(e, specifier) => {
+ let e = Box::new(translate_expression(state, e));
+ let ty = if let Some(ty) = index_vector(&e.ty) {
+ Type::new(ty)
+ } else if let Some(ty) = index_matrix(&e.ty) {
+ Type::new(ty)
+ } else {
+ let a = match &e.ty.array_sizes {
+ Some(a) => {
+ let mut a = *a.clone();
+ a.sizes.pop();
+ if a.sizes.len() == 0 {
+ None
+ } else {
+ Some(Box::new(a))
+ }
+ }
+ _ => panic!("{:#?}", e),
+ };
+ Type {
+ kind: e.ty.kind.clone(),
+ precision: e.ty.precision.clone(),
+ array_sizes: a,
+ }
+ };
+ let indx = specifier.dimensions.0.iter().map(|a| match a {
+ ArraySpecifierDimension::Unsized => panic!("need expression"),
+ ArraySpecifierDimension::ExplicitlySized(e) => translate_expression(state, e),
+ }).collect();
+ Expr {
+ kind: ExprKind::Bracket(e, indx),
+ ty,
+ }
+ }
+ }
+}
+
+fn translate_switch(state: &mut State, s: &syntax::SwitchStatement) -> SwitchStatement {
+ let mut cases = Vec::new();
+
+ let mut case = None;
+ for stmt in &s.body {
+ match stmt {
+ syntax::Statement::Simple(s) => match &**s {
+ syntax::SimpleStatement::CaseLabel(label) => {
+ match case.take() {
+ Some(case) => cases.push(case),
+ _ => {}
+ }
+ case = Some(Case {
+ label: translate_case(state, &label),
+ stmts: Vec::new(),
+ })
+ }
+ _ => match case {
+ Some(ref mut case) => case.stmts.push(translate_statement(state, stmt)),
+ _ => panic!("switch must start with case"),
+ },
+ },
+ _ => match case {
+ Some(ref mut case) => case.stmts.push(translate_statement(state, stmt)),
+ _ => panic!("switch must start with case"),
+ },
+ }
+ }
+ match case.take() {
+ Some(case) => cases.push(case),
+ _ => {}
+ }
+ SwitchStatement {
+ head: Box::new(translate_expression(state, &s.head)),
+ cases,
+ }
+}
+
+fn translate_jump(state: &mut State, s: &syntax::JumpStatement) -> JumpStatement {
+ match s {
+ syntax::JumpStatement::Break => JumpStatement::Break,
+ syntax::JumpStatement::Continue => JumpStatement::Continue,
+ syntax::JumpStatement::Discard => JumpStatement::Discard,
+ syntax::JumpStatement::Return(e) => {
+ JumpStatement::Return(e.as_ref().map(|e| Box::new(translate_expression(state, e))))
+ }
+ }
+}
+
+fn translate_condition(state: &mut State, c: &syntax::Condition) -> Condition {
+ match c {
+ syntax::Condition::Expr(e) => Condition::Expr(Box::new(translate_expression(state, e))),
+ _ => panic!(),
+ }
+}
+
+fn translate_for_init(state: &mut State, s: &syntax::ForInitStatement) -> ForInitStatement {
+ match s {
+ syntax::ForInitStatement::Expression(e) => {
+ ForInitStatement::Expression(e.as_ref().map(|e| translate_expression(state, e)))
+ }
+ syntax::ForInitStatement::Declaration(d) => ForInitStatement::Declaration(Box::new(
+ translate_declaration(state, d, RunClass::Scalar),
+ )),
+ }
+}
+
+fn translate_for_rest(state: &mut State, s: &syntax::ForRestStatement) -> ForRestStatement {
+ ForRestStatement {
+ condition: s.condition.as_ref().map(|c| translate_condition(state, c)),
+ post_expr: s
+ .post_expr
+ .as_ref()
+ .map(|e| Box::new(translate_expression(state, e))),
+ }
+}
+
+fn translate_iteration(state: &mut State, s: &syntax::IterationStatement) -> IterationStatement {
+ match s {
+ syntax::IterationStatement::While(cond, s) => IterationStatement::While(
+ translate_condition(state, cond),
+ Box::new(translate_statement(state, s)),
+ ),
+ syntax::IterationStatement::For(init, rest, s) => IterationStatement::For(
+ translate_for_init(state, init),
+ translate_for_rest(state, rest),
+ Box::new(translate_statement(state, s)),
+ ),
+ syntax::IterationStatement::DoWhile(s, e) => IterationStatement::DoWhile(
+ Box::new(translate_statement(state, s)),
+ Box::new(translate_expression(state, e)),
+ ),
+ }
+}
+
+fn translate_case(state: &mut State, c: &syntax::CaseLabel) -> CaseLabel {
+ match c {
+ syntax::CaseLabel::Def => CaseLabel::Def,
+ syntax::CaseLabel::Case(e) => CaseLabel::Case(Box::new(translate_expression(state, e))),
+ }
+}
+
+fn translate_selection_rest(
+ state: &mut State,
+ s: &syntax::SelectionRestStatement,
+) -> (Box<Statement>, Option<Box<Statement>>) {
+ match s {
+ syntax::SelectionRestStatement::Statement(s) => {
+ (Box::new(translate_statement(state, s)), None)
+ }
+ syntax::SelectionRestStatement::Else(if_body, rest) => (
+ Box::new(translate_statement(state, if_body)),
+ Some(Box::new(translate_statement(state, rest))),
+ ),
+ }
+}
+
+fn translate_selection(state: &mut State, s: &syntax::SelectionStatement) -> SelectionStatement {
+ let cond = Box::new(translate_expression(state, &s.cond));
+ let (body, else_stmt) = translate_selection_rest(state, &s.rest);
+ SelectionStatement {
+ cond,
+ body,
+ else_stmt,
+ }
+}
+
+fn translate_simple_statement(state: &mut State, s: &syntax::SimpleStatement) -> SimpleStatement {
+ match s {
+ syntax::SimpleStatement::Declaration(d) => {
+ SimpleStatement::Declaration(translate_declaration(state, d, RunClass::Unknown))
+ }
+ syntax::SimpleStatement::Expression(e) => {
+ SimpleStatement::Expression(e.as_ref().map(|e| translate_expression(state, e)))
+ }
+ syntax::SimpleStatement::Iteration(i) => {
+ SimpleStatement::Iteration(translate_iteration(state, i))
+ }
+ syntax::SimpleStatement::Selection(s) => {
+ SimpleStatement::Selection(translate_selection(state, s))
+ }
+ syntax::SimpleStatement::Jump(j) => SimpleStatement::Jump(translate_jump(state, j)),
+ syntax::SimpleStatement::Switch(s) => SimpleStatement::Switch(translate_switch(state, s)),
+ syntax::SimpleStatement::CaseLabel(_) => panic!("should be handled by translate_switch"),
+ }
+}
+
+fn translate_statement(state: &mut State, s: &syntax::Statement) -> Statement {
+ match s {
+ syntax::Statement::Compound(s) => {
+ Statement::Compound(Box::new(translate_compound_statement(state, s)))
+ }
+ syntax::Statement::Simple(s) => {
+ Statement::Simple(Box::new(translate_simple_statement(state, s)))
+ }
+ }
+}
+
+fn translate_compound_statement(
+ state: &mut State,
+ cs: &syntax::CompoundStatement,
+) -> CompoundStatement {
+ CompoundStatement {
+ statement_list: cs
+ .statement_list
+ .iter()
+ .map(|x| translate_statement(state, x))
+ .collect(),
+ }
+}
+
+fn translate_function_parameter_declaration(
+ state: &mut State,
+ p: &syntax::FunctionParameterDeclaration,
+ index: usize,
+) -> FunctionParameterDeclaration {
+ match p {
+ syntax::FunctionParameterDeclaration::Named(qual, p) => {
+ let mut ty: Type = lift(state, &p.ty);
+ if let Some(a) = &p.ident.array_spec {
+ ty.array_sizes = Some(Box::new(lift(state, a)));
+ }
+
+ ty.precision = get_precision(qual);
+
+ let decl = SymDecl::Local(
+ StorageClass::None,
+ ty.clone(),
+ RunClass::Dependent(1 << index),
+ );
+ let d = FunctionParameterDeclarator {
+ ty,
+ name: p.ident.ident.clone(),
+ sym: state.declare(p.ident.ident.as_str(), decl),
+ };
+ FunctionParameterDeclaration::Named(lift_type_qualifier_for_parameter(state, qual), d)
+ }
+ syntax::FunctionParameterDeclaration::Unnamed(qual, p) => {
+ FunctionParameterDeclaration::Unnamed(
+ lift_type_qualifier_for_parameter(state, qual),
+ p.clone(),
+ )
+ }
+ }
+}
+
+fn translate_prototype(
+ state: &mut State,
+ cs: &syntax::FunctionPrototype,
+) -> (FunctionPrototype, SymRef) {
+ let prototype = FunctionPrototype {
+ ty: lift(state, &cs.ty),
+ name: cs.name.clone(),
+ parameters: cs
+ .parameters
+ .iter()
+ .enumerate()
+ .map(|(i, x)| translate_function_parameter_declaration(state, x, i))
+ .collect(),
+ };
+ let sym = if let Some(sym) = state.lookup(prototype.name.as_str()) {
+ match &state.sym(sym).decl {
+ SymDecl::UserFunction(..) => {}
+ _ => panic!(
+ "prototype conflicts with existing symbol: {}",
+ prototype.name.as_str()
+ ),
+ }
+ sym
+ } else {
+ let pfd = Rc::new(FunctionDefinition {
+ prototype: prototype.clone(),
+ body: CompoundStatement::new(),
+ globals: Vec::new(),
+ texel_fetches: HashMap::new(),
+ });
+ state.declare(
+ prototype.name.as_str(),
+ SymDecl::UserFunction(pfd, RunClass::Unknown),
+ )
+ };
+ (prototype, sym)
+}
+
+fn translate_function_prototype(
+ state: &mut State,
+ prototype: &syntax::FunctionPrototype,
+) -> FunctionPrototype {
+ let (prototype, _) = translate_prototype(state, prototype);
+ prototype
+}
+
+fn translate_function_definition(
+ state: &mut State,
+ sfd: &syntax::FunctionDefinition,
+) -> Rc<FunctionDefinition> {
+ let (prototype, sym) = translate_prototype(state, &sfd.prototype);
+
+ state.push_scope(prototype.name.as_str().into());
+ state.in_function = Some(sym);
+ state.modified_globals.get_mut().clear();
+ state.texel_fetches.clear();
+ let body = translate_compound_statement(state, &sfd.statement);
+ let mut globals = Vec::new();
+ mem::swap(&mut globals, state.modified_globals.get_mut());
+ let mut texel_fetches = HashMap::new();
+ mem::swap(&mut texel_fetches, &mut state.texel_fetches);
+ state.in_function = None;
+ state.pop_scope();
+
+ let fd = Rc::new(FunctionDefinition {
+ prototype,
+ body,
+ globals,
+ texel_fetches,
+ });
+ state.sym_mut(sym).decl = SymDecl::UserFunction(fd.clone(), RunClass::Unknown);
+ fd
+}
+
+fn translate_external_declaration(
+ state: &mut State,
+ ed: &syntax::ExternalDeclaration,
+) -> ExternalDeclaration {
+ match ed {
+ syntax::ExternalDeclaration::Declaration(d) => {
+ ExternalDeclaration::Declaration(translate_declaration(state, d, RunClass::Unknown))
+ }
+ syntax::ExternalDeclaration::FunctionDefinition(fd) => {
+ ExternalDeclaration::FunctionDefinition(translate_function_definition(state, fd))
+ }
+ syntax::ExternalDeclaration::Preprocessor(p) => {
+ ExternalDeclaration::Preprocessor(p.clone())
+ }
+ }
+}
+
+fn declare_function_ext(
+ state: &mut State,
+ name: &str,
+ cxx_name: Option<&'static str>,
+ ret: Type,
+ params: Vec<Type>,
+ run_class: RunClass,
+) {
+ let sig = FunctionSignature { ret, params };
+ match state.lookup_sym_mut(name) {
+ Some(Symbol {
+ decl: SymDecl::NativeFunction(f, ..),
+ ..
+ }) => f.signatures.push(sig),
+ None => {
+ state.declare(
+ name,
+ SymDecl::NativeFunction(
+ FunctionType {
+ signatures: NonEmpty::new(sig),
+ },
+ cxx_name,
+ run_class,
+ ),
+ );
+ }
+ _ => panic!("overloaded function name {}", name),
+ }
+ //state.declare(name, Type::Function(FunctionType{ v}))
+}
+
+fn declare_function(
+ state: &mut State,
+ name: &str,
+ cxx_name: Option<&'static str>,
+ ret: Type,
+ params: Vec<Type>,
+) {
+ declare_function_ext(state, name, cxx_name, ret, params, RunClass::Unknown)
+}
+
+pub fn ast_to_hir(state: &mut State, tu: &syntax::TranslationUnit) -> TranslationUnit {
+ // global scope
+ state.push_scope("global".into());
+ use TypeKind::*;
+ declare_function(
+ state,
+ "vec2",
+ Some("make_vec2"),
+ Type::new(Vec2),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec2",
+ Some("make_vec2"),
+ Type::new(Vec2),
+ vec![Type::new(Float), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec2",
+ Some("make_vec2"),
+ Type::new(Vec2),
+ vec![Type::new(IVec2)],
+ );
+ declare_function(
+ state,
+ "vec2",
+ Some("make_vec2"),
+ Type::new(Vec2),
+ vec![Type::new(IVec3)],
+ );
+ declare_function(
+ state,
+ "vec3",
+ Some("make_vec3"),
+ Type::new(Vec3),
+ vec![Type::new(Float), Type::new(Float), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec3",
+ Some("make_vec3"),
+ Type::new(Vec3),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec3",
+ Some("make_vec3"),
+ Type::new(Vec3),
+ vec![Type::new(Vec2), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Vec3), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ ],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Vec2), Type::new(Float), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Float), Type::new(Float), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "vec4",
+ Some("make_vec4"),
+ Type::new(Vec4),
+ vec![Type::new(IVec4)],
+ );
+
+ declare_function(
+ state,
+ "bvec2",
+ Some("make_bvec2"),
+ Type::new(BVec2),
+ vec![Type::new(Bool)],
+ );
+ declare_function(
+ state,
+ "bvec3",
+ Some("make_bvec3"),
+ Type::new(BVec3),
+ vec![Type::new(Bool)],
+ );
+ declare_function(
+ state,
+ "bvec4",
+ Some("make_bvec4"),
+ Type::new(BVec4),
+ vec![Type::new(Bool)],
+ );
+ declare_function(
+ state,
+ "bvec4",
+ Some("make_bvec4"),
+ Type::new(BVec4),
+ vec![Type::new(BVec2), Type::new(BVec2)],
+ );
+ declare_function(
+ state,
+ "bvec4",
+ Some("make_bvec4"),
+ Type::new(BVec4),
+ vec![Type::new(Bool), Type::new(Bool), Type::new(Bool), Type::new(Bool)],
+ );
+ declare_function(
+ state,
+ "int",
+ Some("make_int"),
+ Type::new(Int),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "float",
+ Some("make_float"),
+ Type::new(Float),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "float",
+ Some("make_float"),
+ Type::new(Float),
+ vec![Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "int",
+ Some("make_int"),
+ Type::new(Int),
+ vec![Type::new(UInt)],
+ );
+ declare_function(
+ state,
+ "uint",
+ Some("make_uint"),
+ Type::new(UInt),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "uint",
+ Some("make_uint"),
+ Type::new(UInt),
+ vec![Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "ivec2",
+ Some("make_ivec2"),
+ Type::new(IVec2),
+ vec![Type::new(UInt), Type::new(UInt)],
+ );
+ declare_function(
+ state,
+ "ivec2",
+ Some("make_ivec2"),
+ Type::new(IVec2),
+ vec![Type::new(Int), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "ivec2",
+ Some("make_ivec2"),
+ Type::new(IVec2),
+ vec![Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "ivec3",
+ Some("make_ivec3"),
+ Type::new(IVec3),
+ vec![Type::new(IVec2), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "ivec4",
+ Some("make_ivec4"),
+ Type::new(IVec4),
+ vec![
+ Type::new(Int),
+ Type::new(Int),
+ Type::new(Int),
+ Type::new(Int),
+ ],
+ );
+ declare_function(
+ state,
+ "ivec4",
+ Some("make_ivec4"),
+ Type::new(IVec4),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "ivec4",
+ Some("make_ivec4"),
+ Type::new(IVec4),
+ vec![Type::new(IVec2), Type::new(Int), Type::new(Int)],
+ );
+
+ declare_function(
+ state,
+ "mat2",
+ Some("make_mat2"),
+ Type::new(Mat2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "mat2",
+ Some("make_mat2"),
+ Type::new(Mat2),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "mat2",
+ Some("make_mat2"),
+ Type::new(Mat2),
+ vec![Type::new(Mat4)],
+ );
+ declare_function(
+ state,
+ "mat3",
+ Some("make_mat3"),
+ Type::new(Mat3),
+ vec![Type::new(Vec3), Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(
+ state,
+ "mat3",
+ Some("make_mat3"),
+ Type::new(Mat3),
+ vec![Type::new(Mat4)],
+ );
+ declare_function(
+ state,
+ "mat3",
+ Some("make_mat3"),
+ Type::new(Mat3),
+ vec![
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ ],
+ );
+ declare_function(
+ state,
+ "mat3x4",
+ Some("make_mat3x4"),
+ Type::new(Mat34),
+ vec![
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ ],
+ );
+ declare_function(
+ state,
+ "transpose",
+ None,
+ Type::new(Mat43),
+ vec![Type::new(Mat34)],
+ );
+ declare_function(
+ state,
+ "mat4",
+ Some("make_mat4"),
+ Type::new(Mat4),
+ vec![
+ Type::new(Vec4),
+ Type::new(Vec4),
+ Type::new(Vec4),
+ Type::new(Vec4),
+ ],
+ );
+ declare_function(
+ state,
+ "mat4",
+ Some("make_mat4"),
+ Type::new(Mat4),
+ vec![
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ Type::new(Float),
+ ],
+ );
+ declare_function(state, "abs", None, Type::new(Vec2), vec![Type::new(Vec2)]);
+ declare_function(state, "abs", None, Type::new(Vec3), vec![Type::new(Vec3)]);
+ declare_function(state, "abs", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "sign", None, Type::new(Vec2), vec![Type::new(Vec2)]);
+ declare_function(state, "sign", None, Type::new(Vec3), vec![Type::new(Vec3)]);
+ declare_function(state, "sign", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(
+ state,
+ "dot",
+ None,
+ Type::new(Float),
+ vec![Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(
+ state,
+ "dot",
+ None,
+ Type::new(Float),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ for t in &[Vec2, Vec3, Vec4] {
+ declare_function(
+ state,
+ "min",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "max",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(Float)],
+ );
+ }
+ for t in &[Int, Float, Vec2, Vec3, Vec4] {
+ declare_function(
+ state,
+ "min",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(*t)],
+ );
+ declare_function(
+ state,
+ "max",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(*t)],
+ );
+ }
+
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2), Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2), Type::new(Vec2), Type::new(BVec2)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2), Type::new(Vec2), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec3),
+ vec![Type::new(Vec3), Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Vec4), Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Vec4), Type::new(Vec4), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec3),
+ vec![Type::new(Vec3), Type::new(Vec3), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec3),
+ vec![Type::new(Vec3), Type::new(Vec3), Type::new(BVec3)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float), Type::new(Float), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "mix",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Vec4), Type::new(Vec4), Type::new(BVec4)],
+ );
+ declare_function(
+ state,
+ "step",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "step",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "step",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Float), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "step",
+ None,
+ Type::new(Vec3),
+ vec![Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(
+ state,
+ "step",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Float), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "notEqual",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(IVec4), Type::new(IVec4)],
+ );
+
+ declare_function_ext(
+ state,
+ "fwidth",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2)],
+ RunClass::Scalar,
+ );
+ declare_function_ext(
+ state,
+ "dFdx",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float)],
+ RunClass::Scalar,
+ );
+ declare_function_ext(
+ state,
+ "dFdx",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2)],
+ RunClass::Scalar,
+ );
+
+ declare_function(state, "cos", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "sin", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "tan", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "atan", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "atan", None, Type::new(Float), vec![Type::new(Float), Type::new(Float)]);
+ for t in &[Vec2, Vec3, Vec4] {
+ declare_function(
+ state,
+ "clamp",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(Float), Type::new(Float)],
+ );
+ }
+ for t in &[Float, Vec2, Vec3, Vec4] {
+ declare_function(
+ state,
+ "clamp",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t), Type::new(*t), Type::new(*t)],
+ );
+ }
+ declare_function(
+ state,
+ "length",
+ None,
+ Type::new(Float),
+ vec![Type::new(Vec2)],
+ );
+ declare_function(state, "pow", None, Type::new(Vec3), vec![Type::new(Vec3)]);
+ declare_function(state, "pow", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "exp", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "exp2", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "log", None, Type::new(Float), vec![Type::new(Float)]);
+ declare_function(state, "log2", None, Type::new(Float), vec![Type::new(Float)]);
+ for t in &[Float, Vec2] {
+ // recip is non-standard
+ declare_function(
+ state,
+ "recip",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t)],
+ );
+ declare_function(
+ state,
+ "inversesqrt",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t)],
+ );
+ declare_function(
+ state,
+ "sqrt",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t)],
+ );
+ }
+ declare_function(
+ state,
+ "distance",
+ None,
+ Type::new(Float),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+
+ declare_function(
+ state,
+ "equal",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "equal",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "notEqual",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "notEqual",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "lessThanEqual",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "lessThanEqual",
+ None,
+ Type::new(BVec3),
+ vec![Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(
+ state,
+ "lessThanEqual",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "lessThan",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "lessThan",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "greaterThan",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "greaterThan",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "greaterThanEqual",
+ None,
+ Type::new(BVec2),
+ vec![Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "greaterThanEqual",
+ None,
+ Type::new(BVec4),
+ vec![Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(state, "any", None, Type::new(Bool), vec![Type::new(BVec2)]);
+ declare_function(state, "all", None, Type::new(Bool), vec![Type::new(BVec2)]);
+ declare_function(state, "all", None, Type::new(Bool), vec![Type::new(BVec4)]);
+
+ declare_function(
+ state,
+ "if_then_else",
+ None,
+ Type::new(Vec3),
+ vec![Type::new(BVec3), Type::new(Vec3), Type::new(Vec3)],
+ );
+ declare_function(state, "floor", None, Type::new(Vec4), vec![Type::new(Vec4)]);
+ declare_function(state, "floor", None, Type::new(Vec2), vec![Type::new(Vec2)]);
+ declare_function(
+ state,
+ "floor",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "ceil",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "round",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "fract",
+ None,
+ Type::new(Float),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "fract",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2)],
+ );
+ declare_function(state, "mod", None, Type::new(Vec2), vec![Type::new(Vec2)]);
+ declare_function(state, "mod", None, Type::new(Float), vec![Type::new(Float)]);
+
+ declare_function(
+ state,
+ "texelFetch",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Sampler2D), Type::new(IVec2), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "texelFetch",
+ None,
+ Type::new(IVec4),
+ vec![Type::new(ISampler2D), Type::new(IVec2), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "texelFetchOffset",
+ None,
+ Type::new(Vec4),
+ vec![
+ Type::new(Sampler2D),
+ Type::new(IVec2),
+ Type::new(Int),
+ Type::new(IVec2),
+ ],
+ );
+ declare_function(
+ state,
+ "texelFetchOffset",
+ None,
+ Type::new(IVec4),
+ vec![
+ Type::new(ISampler2D),
+ Type::new(IVec2),
+ Type::new(Int),
+ Type::new(IVec2),
+ ],
+ );
+ declare_function(
+ state,
+ "texture",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Sampler2D), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "texture",
+ None,
+ Type::new(Vec4),
+ vec![Type::new(Sampler2DRect), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "textureSize",
+ None,
+ Type::new(IVec2),
+ vec![Type::new(Sampler2D), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "textureSize",
+ None,
+ Type::new(IVec2),
+ vec![Type::new(Sampler2DRect), Type::new(Int)],
+ );
+
+ declare_function(
+ state,
+ "inverse",
+ None,
+ Type::new(Mat2),
+ vec![Type::new(Mat2)],
+ );
+ declare_function(
+ state,
+ "transpose",
+ None,
+ Type::new(Mat3),
+ vec![Type::new(Mat3)],
+ );
+ declare_function(
+ state,
+ "normalize",
+ None,
+ Type::new(Vec2),
+ vec![Type::new(Vec2)],
+ );
+ state.declare(
+ "gl_FragCoord",
+ SymDecl::Global(StorageClass::In, None, Type::new(Vec4), RunClass::Vector),
+ );
+ state.declare(
+ "gl_FragColor",
+ SymDecl::Global(StorageClass::Out, None, Type::new(Vec4), RunClass::Vector),
+ );
+ state.declare(
+ "gl_Position",
+ SymDecl::Global(StorageClass::Out, None, Type::new(Vec4), RunClass::Vector),
+ );
+ state.clip_dist_sym = state.declare(
+ "gl_ClipDistance",
+ SymDecl::Global(StorageClass::Out, None, Type::new_array(Float, 4), RunClass::Vector),
+ );
+
+ state.declare(
+ "swgl_SpanLength",
+ SymDecl::Global(StorageClass::In, None, Type::new(Int), RunClass::Scalar),
+ );
+ state.declare(
+ "swgl_StepSize",
+ SymDecl::Global(StorageClass::Const, None, Type::new(Int), RunClass::Scalar),
+ );
+
+ for t in &[Float, Vec2, Vec3, Vec4, Int, IVec2, IVec3, IVec4, Mat3, Mat4] {
+ declare_function_ext(
+ state,
+ "swgl_forceScalar",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t)],
+ RunClass::Scalar,
+ );
+ }
+
+ // GL_ARB_shader_group_vote
+ for (name, cxx_name) in &[("anyInvocations", "test_any"),
+ ("allInvocations", "test_all"),
+ ("allInvocationsEqual", "test_equal")] {
+ declare_function_ext(
+ state,
+ name,
+ Some(cxx_name),
+ Type::new(Bool),
+ vec![Type::new(Bool)],
+ RunClass::Scalar,
+ );
+ }
+
+ declare_function(
+ state,
+ "swgl_stepInterp",
+ None,
+ Type::new(Void),
+ vec![],
+ );
+
+ for t in &[Float, Vec2, Vec3, Vec4] {
+ declare_function_ext(
+ state,
+ "swgl_interpStep",
+ None,
+ Type::new(*t),
+ vec![Type::new(*t)],
+ RunClass::Scalar,
+ );
+ }
+
+ declare_function(
+ state,
+ "swgl_commitPartialSolidRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Int), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitPartialSolidR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Int), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitSolidRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitSolidR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitColorR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_blendDropShadow",
+ None,
+ Type::new(Void),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_blendSubpixelText",
+ None,
+ Type::new(Void),
+ vec![Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_clipMask",
+ None,
+ Type::new(Void),
+ vec![Type::new(Sampler2D), Type::new(Vec2), Type::new(Vec2), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "swgl_antiAlias",
+ None,
+ Type::new(Void),
+ vec![Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "swgl_antiAlias",
+ None,
+ Type::new(Void),
+ vec![Type::new(BVec4)],
+ );
+ declare_function_ext(
+ state,
+ "swgl_validateGradient",
+ None,
+ Type::new(Int),
+ vec![Type::new(Sampler2D), Type::new(IVec2), Type::new(Int)],
+ RunClass::Scalar,
+ );
+ declare_function(
+ state,
+ "swgl_commitLinearGradientRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Sampler2D), Type::new(Int), Type::new(Float), Type::new(Bool), Type::new(Bool),
+ Type::new(Vec2), Type::new(Vec2), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitRadialGradientRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Sampler2D), Type::new(Int), Type::new(Float), Type::new(Bool), Type::new(Vec2),
+ Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitGradientRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Sampler2D), Type::new(Int), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitGradientColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Sampler2D), Type::new(Int), Type::new(Float), Type::new(Float)],
+ );
+ for s in &[Sampler2D, Sampler2DRect] {
+ declare_function_ext(
+ state,
+ "swgl_isTextureLinear",
+ None,
+ Type::new(Bool),
+ vec![Type::new(*s)],
+ RunClass::Scalar,
+ );
+ declare_function_ext(
+ state,
+ "swgl_isTextureRGBA8",
+ None,
+ Type::new(Bool),
+ vec![Type::new(*s)],
+ RunClass::Scalar,
+ );
+ declare_function_ext(
+ state,
+ "swgl_isTextureR8",
+ None,
+ Type::new(Bool),
+ vec![Type::new(*s)],
+ RunClass::Scalar,
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearR8ToRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitPartialTextureLinearR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Int), Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitPartialTextureLinearInvertR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(Int), Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorR8ToRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Vec4)],
+ );
+
+ declare_function(
+ state,
+ "swgl_commitTextureLinearRepeatRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearRepeatColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4), Type::new(Vec4)],
+ );
+
+ declare_function(
+ state,
+ "swgl_commitTextureNearestRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureNearestColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureNearestRepeatRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureNearestRepeatColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4), Type::new(Vec4)],
+ );
+
+ declare_function(
+ state,
+ "swgl_commitTextureRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureRepeatRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureRepeatColorRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec2),
+ Type::new(Vec4), Type::new(Vec4), Type::new(Vec4)],
+ );
+
+ declare_function(
+ state,
+ "swgl_commitGaussianBlurRGBA8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Bool),
+ Type::new(Int), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "swgl_commitGaussianBlurR8",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4), Type::new(Bool),
+ Type::new(Int), Type::new(Vec2)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int),
+ Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int),
+ Type::new(Float)],
+ );
+ declare_function(
+ state,
+ "swgl_commitTextureLinearColorYUV",
+ None,
+ Type::new(Void),
+ vec![Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(*s), Type::new(Vec2), Type::new(Vec4),
+ Type::new(Vec3), Type::new(Mat3), Type::new(Int),
+ Type::new(Float)],
+ );
+ }
+
+ TranslationUnit(tu.0.map(state, translate_external_declaration))
+}
+
+fn infer_expr_inner(state: &mut State, expr: &Expr, assign: &mut SymRef) -> RunClass {
+ match expr.kind {
+ ExprKind::Variable(ref i) => {
+ *assign = *i;
+ match &state.sym(*i).decl {
+ SymDecl::Local(_, _, ref run_class) => *run_class,
+ SymDecl::Global(_, _, _, ref run_class) => *run_class,
+ _ => panic!(),
+ }
+ }
+ ExprKind::IntConst(_)
+ | ExprKind::UIntConst(_)
+ | ExprKind::BoolConst(_)
+ | ExprKind::FloatConst(_)
+ | ExprKind::DoubleConst(_) => RunClass::Scalar,
+ ExprKind::Unary(_, ref e) => infer_expr(state, e),
+ ExprKind::Binary(_, ref l, ref r) => infer_expr(state, l).merge(infer_expr(state, r)),
+ ExprKind::Ternary(ref c, ref s, ref e) => infer_expr(state, c)
+ .merge(infer_expr(state, s))
+ .merge(infer_expr(state, e)),
+ ExprKind::Assignment(ref v, _, ref e) => {
+ let mut sym = SymRef(!0);
+ let run_class = infer_expr_inner(state, v, &mut sym).merge(infer_expr(state, e));
+ assert!(sym != SymRef(!0));
+ state.merge_run_class(sym, run_class)
+ }
+ ExprKind::Bracket(ref e, ref indx) => {
+ indx.iter().fold(
+ infer_expr_inner(state, e, assign),
+ |run_class, indx| run_class.merge(infer_expr(state, indx)),
+ )
+ }
+ ExprKind::FunCall(ref fun, ref args) => {
+ let arg_classes: Vec<(RunClass, SymRef)> = args
+ .iter()
+ .map(|e| {
+ let mut assign = SymRef(!0);
+ let run_class = infer_expr_inner(state, e, &mut assign);
+ (run_class, assign)
+ })
+ .collect();
+ let run_class = if args.is_empty() {
+ RunClass::Scalar
+ } else {
+ arg_classes
+ .iter()
+ .fold(RunClass::Unknown, |x, &(y, _)| x.merge(y))
+ };
+ match fun {
+ FunIdentifier::Identifier(ref sym) => match &state.sym(*sym).decl {
+ SymDecl::NativeFunction(_, _, ref ret_class) => {
+ if *ret_class != RunClass::Unknown {
+ *ret_class
+ } else {
+ run_class
+ }
+ }
+ SymDecl::UserFunction(ref fd, ref run_class) => {
+ for (&(mut arg_class, assign), param) in
+ arg_classes.iter().zip(fd.prototype.parameters.iter())
+ {
+ if let FunctionParameterDeclaration::Named(Some(qual), p) = param {
+ match qual {
+ ParameterQualifier::InOut | ParameterQualifier::Out => {
+ if let SymDecl::Local(_, _, param_class) =
+ &state.sym(p.sym).decl
+ {
+ match param_class {
+ RunClass::Unknown | RunClass::Vector => {
+ arg_class = RunClass::Vector;
+ }
+ RunClass::Dependent(mask) => {
+ for i in 0 .. 31 {
+ if (mask & (1 << i)) != 0 {
+ arg_class =
+ arg_class.merge(arg_classes[i].0);
+ }
+ }
+ }
+ RunClass::Scalar => {}
+ }
+ }
+ assert!(assign != SymRef(!0));
+ state.merge_run_class(assign, arg_class);
+ }
+ _ => {}
+ }
+ }
+ }
+ if fd.prototype.ty.kind == TypeKind::Void {
+ RunClass::Scalar
+ } else {
+ match *run_class {
+ RunClass::Unknown | RunClass::Vector => RunClass::Vector,
+ RunClass::Dependent(mask) => {
+ let mut ret_class = RunClass::Unknown;
+ for i in 0 .. 31 {
+ if (mask & (1 << i)) != 0 {
+ ret_class = ret_class.merge(arg_classes[i].0);
+ }
+ }
+ ret_class
+ }
+ RunClass::Scalar => RunClass::Scalar,
+ }
+ }
+ }
+ SymDecl::Struct(..) => run_class,
+ _ => panic!(),
+ },
+ FunIdentifier::Constructor(..) => run_class,
+ }
+ }
+ ExprKind::Dot(ref e, _) => infer_expr_inner(state, e, assign),
+ ExprKind::SwizzleSelector(ref e, _) => infer_expr_inner(state, e, assign),
+ ExprKind::PostInc(ref e) => infer_expr_inner(state, e, assign),
+ ExprKind::PostDec(ref e) => infer_expr_inner(state, e, assign),
+ ExprKind::Comma(ref a, ref b) => {
+ infer_expr(state, a);
+ infer_expr(state, b)
+ }
+ ExprKind::Cond(_, ref e) => infer_expr(state, e),
+ ExprKind::CondMask => RunClass::Vector,
+ }
+}
+
+fn infer_expr(state: &mut State, expr: &Expr) -> RunClass {
+ infer_expr_inner(state, expr, &mut SymRef(!0))
+}
+
+fn infer_condition(state: &mut State, c: &Condition) {
+ match *c {
+ Condition::Expr(ref e) => {
+ infer_expr(state, e);
+ }
+ }
+}
+
+fn infer_iteration_statement(state: &mut State, ist: &IterationStatement) {
+ let changed = state.run_class_changed.replace(true);
+ match *ist {
+ IterationStatement::While(ref cond, ref body) => {
+ while state.run_class_changed.replace(false) {
+ infer_condition(state, cond);
+ infer_statement(state, body);
+ }
+ }
+ IterationStatement::DoWhile(ref body, ref cond) => {
+ while state.run_class_changed.replace(false) {
+ infer_statement(state, body);
+ infer_expr(state, cond);
+ }
+ }
+ IterationStatement::For(ref init, ref rest, ref body) => {
+ match *init {
+ ForInitStatement::Expression(ref expr) => {
+ if let Some(ref e) = *expr {
+ infer_expr(state, e);
+ }
+ }
+ ForInitStatement::Declaration(ref d) => {
+ infer_declaration(state, d);
+ }
+ }
+ while state.run_class_changed.replace(false) {
+ if let Some(ref cond) = rest.condition {
+ infer_condition(state, cond);
+ }
+ if let Some(ref e) = rest.post_expr {
+ infer_expr(state, e);
+ }
+ infer_statement(state, body);
+ }
+ }
+ }
+ state.run_class_changed.set(changed);
+}
+
+fn infer_selection_statement(state: &mut State, sst: &SelectionStatement) {
+ let mut branch_run_class = state.branch_run_class.merge(infer_expr(state, &sst.cond));
+ mem::swap(&mut state.branch_run_class, &mut branch_run_class);
+ let branch_declaration = state.branch_declaration;
+ state.branch_declaration = state.last_declaration;
+ infer_statement(state, &sst.body);
+ if let Some(ref else_st) = sst.else_stmt {
+ infer_statement(state, else_st);
+ }
+ state.branch_run_class = branch_run_class;
+ state.branch_declaration = branch_declaration;
+}
+
+fn infer_expression_statement(state: &mut State, est: &ExprStatement) {
+ if let Some(ref e) = *est {
+ infer_expr(state, e);
+ }
+}
+
+fn infer_switch_statement(state: &mut State, sst: &SwitchStatement) {
+ let mut branch_run_class = state.branch_run_class.merge(infer_expr(state, &sst.head));
+ mem::swap(&mut state.branch_run_class, &mut branch_run_class);
+ let branch_declaration = state.branch_declaration;
+ state.branch_declaration = state.last_declaration;
+ for case in &sst.cases {
+ for st in &case.stmts {
+ infer_statement(state, st);
+ }
+ }
+ state.branch_run_class = branch_run_class;
+ state.branch_declaration = branch_declaration;
+}
+
+fn infer_jump_statement(state: &mut State, j: &JumpStatement) {
+ match *j {
+ JumpStatement::Continue => {}
+ JumpStatement::Break => {}
+ JumpStatement::Discard => {}
+ JumpStatement::Return(ref e) => {
+ if let Some(e) = e {
+ let run_class = infer_expr(state, e);
+ state.return_run_class(run_class);
+ }
+ }
+ }
+}
+
+fn infer_initializer(state: &mut State, i: &Initializer) -> RunClass {
+ match *i {
+ Initializer::Simple(ref e) => infer_expr(state, e),
+ Initializer::List(ref list) => {
+ let mut run_class = RunClass::Unknown;
+ for ini in list.0.iter() {
+ run_class = run_class.merge(infer_initializer(state, ini));
+ }
+ run_class
+ }
+ }
+}
+
+fn infer_declaration(state: &mut State, d: &Declaration) {
+ match *d {
+ Declaration::FunctionPrototype(..) => {}
+ Declaration::InitDeclaratorList(ref list) => {
+ state.last_declaration = list.head.name;
+
+ let mut run_class = RunClass::Unknown;
+ for decl in &list.tail {
+ if let Some(ref initializer) = decl.initializer {
+ run_class = run_class.merge(infer_initializer(state, initializer));
+ }
+ }
+ if let Some(ref initializer) = list.head.initializer {
+ run_class = run_class.merge(infer_initializer(state, initializer));
+ state.merge_run_class(list.head.name, run_class);
+ }
+ }
+ Declaration::Precision(..) => {}
+ Declaration::Block(..) => {}
+ Declaration::Global(..) => {}
+ Declaration::StructDefinition(..) => {}
+ }
+}
+
+fn infer_simple_statement(state: &mut State, sst: &SimpleStatement) {
+ match *sst {
+ SimpleStatement::Declaration(ref d) => infer_declaration(state, d),
+ SimpleStatement::Expression(ref e) => infer_expression_statement(state, e),
+ SimpleStatement::Selection(ref s) => infer_selection_statement(state, s),
+ SimpleStatement::Switch(ref s) => infer_switch_statement(state, s),
+ SimpleStatement::Iteration(ref i) => infer_iteration_statement(state, i),
+ SimpleStatement::Jump(ref j) => infer_jump_statement(state, j),
+ }
+}
+
+fn infer_compound_statement(state: &mut State, cst: &CompoundStatement) {
+ for st in &cst.statement_list {
+ infer_statement(state, st);
+ }
+}
+
+fn infer_statement(state: &mut State, st: &Statement) {
+ match *st {
+ Statement::Compound(ref cst) => infer_compound_statement(state, cst),
+ Statement::Simple(ref sst) => infer_simple_statement(state, sst),
+ }
+}
+
+fn infer_function_definition(state: &mut State, fd: &FunctionDefinition) {
+ state.in_function = Some(state.lookup(fd.prototype.name.as_str()).unwrap());
+
+ state.run_class_changed.set(true);
+ while state.run_class_changed.replace(false) {
+ for st in &fd.body.statement_list {
+ infer_statement(state, st);
+ }
+ }
+
+ state.in_function = None;
+}
+
+fn infer_external_declaration(state: &mut State, ed: &ExternalDeclaration) {
+ match *ed {
+ ExternalDeclaration::Preprocessor(_) => {}
+ ExternalDeclaration::FunctionDefinition(ref fd) => infer_function_definition(state, fd),
+ ExternalDeclaration::Declaration(_) => {}
+ }
+}
+
+pub fn infer_run_class(state: &mut State, tu: &TranslationUnit) {
+ for ed in &(tu.0).0 {
+ infer_external_declaration(state, ed);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 22:07:28 +0000