1 files changed, 319 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/type_.rs b/compiler/rustc_codegen_llvm/src/type_.rs
new file mode 100644
index 000000000..eeb38d4ec
--- /dev/null
+++ b/compiler/rustc_codegen_llvm/src/type_.rs
@@ -0,0 +1,319 @@
+pub use crate::llvm::Type;
+
+use crate::abi::{FnAbiLlvmExt, LlvmType};
+use crate::common;
+use crate::context::CodegenCx;
+use crate::llvm;
+use crate::llvm::{Bool, False, True};
+use crate::type_of::LayoutLlvmExt;
+use crate::value::Value;
+use rustc_codegen_ssa::common::TypeKind;
+use rustc_codegen_ssa::traits::*;
+use rustc_data_structures::small_c_str::SmallCStr;
+use rustc_middle::bug;
+use rustc_middle::ty::layout::TyAndLayout;
+use rustc_middle::ty::{self, Ty};
+use rustc_target::abi::call::{CastTarget, FnAbi, Reg};
+use rustc_target::abi::{AddressSpace, Align, Integer, Size};
+
+use std::fmt;
+use std::ptr;
+
+use libc::{c_char, c_uint};
+
+impl PartialEq for Type {
+    fn eq(&self, other: &Self) -> bool {
+        ptr::eq(self, other)
+    }
+}
+
+impl fmt::Debug for Type {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(
+            &llvm::build_string(|s| unsafe {
+                llvm::LLVMRustWriteTypeToString(self, s);
+            })
+            .expect("non-UTF8 type description from LLVM"),
+        )
+    }
+}
+
+impl<'ll> CodegenCx<'ll, '_> {
+    pub(crate) fn type_named_struct(&self, name: &str) -> &'ll Type {
+        let name = SmallCStr::new(name);
+        unsafe { llvm::LLVMStructCreateNamed(self.llcx, name.as_ptr()) }
+    }
+
+    pub(crate) fn set_struct_body(&self, ty: &'ll Type, els: &[&'ll Type], packed: bool) {
+        unsafe { llvm::LLVMStructSetBody(ty, els.as_ptr(), els.len() as c_uint, packed as Bool) }
+    }
+
+    pub(crate) fn type_void(&self) -> &'ll Type {
+        unsafe { llvm::LLVMVoidTypeInContext(self.llcx) }
+    }
+
+    pub(crate) fn type_metadata(&self) -> &'ll Type {
+        unsafe { llvm::LLVMRustMetadataTypeInContext(self.llcx) }
+    }
+
+    ///x Creates an integer type with the given number of bits, e.g., i24
+    pub(crate) fn type_ix(&self, num_bits: u64) -> &'ll Type {
+        unsafe { llvm::LLVMIntTypeInContext(self.llcx, num_bits as c_uint) }
+    }
+
+    pub(crate) fn type_vector(&self, ty: &'ll Type, len: u64) -> &'ll Type {
+        unsafe { llvm::LLVMVectorType(ty, len as c_uint) }
+    }
+
+    pub(crate) fn func_params_types(&self, ty: &'ll Type) -> Vec<&'ll Type> {
+        unsafe {
+            let n_args = llvm::LLVMCountParamTypes(ty) as usize;
+            let mut args = Vec::with_capacity(n_args);
+            llvm::LLVMGetParamTypes(ty, args.as_mut_ptr());
+            args.set_len(n_args);
+            args
+        }
+    }
+
+    pub(crate) fn type_bool(&self) -> &'ll Type {
+        self.type_i8()
+    }
+
+    pub(crate) fn type_int_from_ty(&self, t: ty::IntTy) -> &'ll Type {
+        match t {
+            ty::IntTy::Isize => self.type_isize(),
+            ty::IntTy::I8 => self.type_i8(),
+            ty::IntTy::I16 => self.type_i16(),
+            ty::IntTy::I32 => self.type_i32(),
+            ty::IntTy::I64 => self.type_i64(),
+            ty::IntTy::I128 => self.type_i128(),
+        }
+    }
+
+    pub(crate) fn type_uint_from_ty(&self, t: ty::UintTy) -> &'ll Type {
+        match t {
+            ty::UintTy::Usize => self.type_isize(),
+            ty::UintTy::U8 => self.type_i8(),
+            ty::UintTy::U16 => self.type_i16(),
+            ty::UintTy::U32 => self.type_i32(),
+            ty::UintTy::U64 => self.type_i64(),
+            ty::UintTy::U128 => self.type_i128(),
+        }
+    }
+
+    pub(crate) fn type_float_from_ty(&self, t: ty::FloatTy) -> &'ll Type {
+        match t {
+            ty::FloatTy::F32 => self.type_f32(),
+            ty::FloatTy::F64 => self.type_f64(),
+        }
+    }
+
+    pub(crate) fn type_pointee_for_align(&self, align: Align) -> &'ll Type {
+        // FIXME(eddyb) We could find a better approximation if ity.align < align.
+        let ity = Integer::approximate_align(self, align);
+        self.type_from_integer(ity)
+    }
+
+    /// Return a LLVM type that has at most the required alignment,
+    /// and exactly the required size, as a best-effort padding array.
+    pub(crate) fn type_padding_filler(&self, size: Size, align: Align) -> &'ll Type {
+        let unit = Integer::approximate_align(self, align);
+        let size = size.bytes();
+        let unit_size = unit.size().bytes();
+        assert_eq!(size % unit_size, 0);
+        self.type_array(self.type_from_integer(unit), size / unit_size)
+    }
+
+    pub(crate) fn type_variadic_func(&self, args: &[&'ll Type], ret: &'ll Type) -> &'ll Type {
+        unsafe { llvm::LLVMFunctionType(ret, args.as_ptr(), args.len() as c_uint, True) }
+    }
+
+    pub(crate) fn type_array(&self, ty: &'ll Type, len: u64) -> &'ll Type {
+        unsafe { llvm::LLVMRustArrayType(ty, len) }
+    }
+}
+
+impl<'ll, 'tcx> BaseTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
+    fn type_i1(&self) -> &'ll Type {
+        unsafe { llvm::LLVMInt1TypeInContext(self.llcx) }
+    }
+
+    fn type_i8(&self) -> &'ll Type {
+        unsafe { llvm::LLVMInt8TypeInContext(self.llcx) }
+    }
+
+    fn type_i16(&self) -> &'ll Type {
+        unsafe { llvm::LLVMInt16TypeInContext(self.llcx) }
+    }
+
+    fn type_i32(&self) -> &'ll Type {
+        unsafe { llvm::LLVMInt32TypeInContext(self.llcx) }
+    }
+
+    fn type_i64(&self) -> &'ll Type {
+        unsafe { llvm::LLVMInt64TypeInContext(self.llcx) }
+    }
+
+    fn type_i128(&self) -> &'ll Type {
+        unsafe { llvm::LLVMIntTypeInContext(self.llcx, 128) }
+    }
+
+    fn type_isize(&self) -> &'ll Type {
+        self.isize_ty
+    }
+
+    fn type_f32(&self) -> &'ll Type {
+        unsafe { llvm::LLVMFloatTypeInContext(self.llcx) }
+    }
+
+    fn type_f64(&self) -> &'ll Type {
+        unsafe { llvm::LLVMDoubleTypeInContext(self.llcx) }
+    }
+
+    fn type_func(&self, args: &[&'ll Type], ret: &'ll Type) -> &'ll Type {
+        unsafe { llvm::LLVMFunctionType(ret, args.as_ptr(), args.len() as c_uint, False) }
+    }
+
+    fn type_struct(&self, els: &[&'ll Type], packed: bool) -> &'ll Type {
+        unsafe {
+            llvm::LLVMStructTypeInContext(
+                self.llcx,
+                els.as_ptr(),
+                els.len() as c_uint,
+                packed as Bool,
+            )
+        }
+    }
+
+    fn type_kind(&self, ty: &'ll Type) -> TypeKind {
+        unsafe { llvm::LLVMRustGetTypeKind(ty).to_generic() }
+    }
+
+    fn type_ptr_to(&self, ty: &'ll Type) -> &'ll Type {
+        assert_ne!(
+            self.type_kind(ty),
+            TypeKind::Function,
+            "don't call ptr_to on function types, use ptr_to_llvm_type on FnAbi instead or explicitly specify an address space if it makes sense"
+        );
+        ty.ptr_to(AddressSpace::DATA)
+    }
+
+    fn type_ptr_to_ext(&self, ty: &'ll Type, address_space: AddressSpace) -> &'ll Type {
+        ty.ptr_to(address_space)
+    }
+
+    fn element_type(&self, ty: &'ll Type) -> &'ll Type {
+        match self.type_kind(ty) {
+            TypeKind::Array | TypeKind::Vector => unsafe { llvm::LLVMGetElementType(ty) },
+            TypeKind::Pointer => bug!("element_type is not supported for opaque pointers"),
+            other => bug!("element_type called on unsupported type {:?}", other),
+        }
+    }
+
+    fn vector_length(&self, ty: &'ll Type) -> usize {
+        unsafe { llvm::LLVMGetVectorSize(ty) as usize }
+    }
+
+    fn float_width(&self, ty: &'ll Type) -> usize {
+        match self.type_kind(ty) {
+            TypeKind::Float => 32,
+            TypeKind::Double => 64,
+            TypeKind::X86_FP80 => 80,
+            TypeKind::FP128 | TypeKind::PPC_FP128 => 128,
+            _ => bug!("llvm_float_width called on a non-float type"),
+        }
+    }
+
+    fn int_width(&self, ty: &'ll Type) -> u64 {
+        unsafe { llvm::LLVMGetIntTypeWidth(ty) as u64 }
+    }
+
+    fn val_ty(&self, v: &'ll Value) -> &'ll Type {
+        common::val_ty(v)
+    }
+}
+
+impl Type {
+    pub fn i8_llcx(llcx: &llvm::Context) -> &Type {
+        unsafe { llvm::LLVMInt8TypeInContext(llcx) }
+    }
+
+    // Creates an integer type with the given number of bits, e.g., i24
+    pub fn ix_llcx(llcx: &llvm::Context, num_bits: u64) -> &Type {
+        unsafe { llvm::LLVMIntTypeInContext(llcx, num_bits as c_uint) }
+    }
+
+    pub fn i8p_llcx(llcx: &llvm::Context) -> &Type {
+        Type::i8_llcx(llcx).ptr_to(AddressSpace::DATA)
+    }
+
+    fn ptr_to(&self, address_space: AddressSpace) -> &Type {
+        unsafe { llvm::LLVMPointerType(self, address_space.0) }
+    }
+}
+
+impl<'ll, 'tcx> LayoutTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
+    fn backend_type(&self, layout: TyAndLayout<'tcx>) -> &'ll Type {
+        layout.llvm_type(self)
+    }
+    fn immediate_backend_type(&self, layout: TyAndLayout<'tcx>) -> &'ll Type {
+        layout.immediate_llvm_type(self)
+    }
+    fn is_backend_immediate(&self, layout: TyAndLayout<'tcx>) -> bool {
+        layout.is_llvm_immediate()
+    }
+    fn is_backend_scalar_pair(&self, layout: TyAndLayout<'tcx>) -> bool {
+        layout.is_llvm_scalar_pair()
+    }
+    fn backend_field_index(&self, layout: TyAndLayout<'tcx>, index: usize) -> u64 {
+        layout.llvm_field_index(self, index)
+    }
+    fn scalar_pair_element_backend_type(
+        &self,
+        layout: TyAndLayout<'tcx>,
+        index: usize,
+        immediate: bool,
+    ) -> &'ll Type {
+        layout.scalar_pair_element_llvm_type(self, index, immediate)
+    }
+    fn cast_backend_type(&self, ty: &CastTarget) -> &'ll Type {
+        ty.llvm_type(self)
+    }
+    fn fn_decl_backend_type(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> &'ll Type {
+        fn_abi.llvm_type(self)
+    }
+    fn fn_ptr_backend_type(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> &'ll Type {
+        fn_abi.ptr_to_llvm_type(self)
+    }
+    fn reg_backend_type(&self, ty: &Reg) -> &'ll Type {
+        ty.llvm_type(self)
+    }
+}
+
+impl<'ll, 'tcx> TypeMembershipMethods<'tcx> for CodegenCx<'ll, 'tcx> {
+    fn set_type_metadata(&self, function: &'ll Value, typeid: String) {
+        let typeid_metadata = self.typeid_metadata(typeid);
+        let v = [self.const_usize(0), typeid_metadata];
+        unsafe {
+            llvm::LLVMGlobalSetMetadata(
+                function,
+                llvm::MD_type as c_uint,
+                llvm::LLVMValueAsMetadata(llvm::LLVMMDNodeInContext(
+                    self.llcx,
+                    v.as_ptr(),
+                    v.len() as c_uint,
+                )),
+            )
+        }
+    }
+
+    fn typeid_metadata(&self, typeid: String) -> &'ll Value {
+        unsafe {
+            llvm::LLVMMDStringInContext(
+                self.llcx,
+                typeid.as_ptr() as *const c_char,
+                typeid.len() as c_uint,
+            )
+        }
+    }
+}