Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 7 insertions, 16 deletions

diff --git a/compiler/rustc_target/src/abi/call/mod.rs b/compiler/rustc_target/src/abi/call/mod.rs
index 1ae11f567..c4abf6f4b 100644
--- a/compiler/rustc_target/src/abi/call/mod.rs
+++ b/compiler/rustc_target/src/abi/call/mod.rs
@@ -2,7 +2,6 @@ use crate::abi::{self, Abi, Align, FieldsShape, Size};
 use crate::abi::{HasDataLayout, TyAbiInterface, TyAndLayout};
 use crate::spec::{self, HasTargetSpec};
 use rustc_span::Symbol;
-use std::fmt;
 use std::str::FromStr;
 
 mod aarch64;
@@ -633,16 +632,6 @@ pub enum AdjustForForeignAbiError {
     Unsupported { arch: Symbol, abi: spec::abi::Abi },
 }
 
-impl fmt::Display for AdjustForForeignAbiError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Self::Unsupported { arch, abi } => {
-                write!(f, "target architecture {arch:?} does not support `extern {abi}` ABI")
-            }
-        }
-    }
-}
-
 impl<'a, Ty> FnAbi<'a, Ty> {
     pub fn adjust_for_foreign_abi<C>(
         &mut self,
diff --git a/compiler/rustc_target/src/abi/call/x86_64.rs b/compiler/rustc_target/src/abi/call/x86_64.rs
index 9427f27d1..b1aefaf05 100644
--- a/compiler/rustc_target/src/abi/call/x86_64.rs
+++ b/compiler/rustc_target/src/abi/call/x86_64.rs
@@ -1,5 +1,5 @@
 // The classification code for the x86_64 ABI is taken from the clay language
-// https://github.com/jckarter/clay/blob/master/compiler/src/externals.cpp
+// https://github.com/jckarter/clay/blob/db0bd2702ab0b6e48965cd85f8859bbd5f60e48e/compiler/externals.cpp
 
 use crate::abi::call::{ArgAbi, CastTarget, FnAbi, Reg, RegKind};
 use crate::abi::{self, Abi, HasDataLayout, Size, TyAbiInterface, TyAndLayout};
@@ -153,9 +153,9 @@ fn reg_component(cls: &[Option<Class>], i: &mut usize, size: Size) -> Option<Reg
     }
 }
 
-fn cast_target(cls: &[Option<Class>], size: Size) -> CastTarget {
+fn cast_target(cls: &[Option<Class>], size: Size) -> Option<CastTarget> {
     let mut i = 0;
-    let lo = reg_component(cls, &mut i, size).unwrap();
+    let lo = reg_component(cls, &mut i, size)?;
     let offset = Size::from_bytes(8) * (i as u64);
     let mut target = CastTarget::from(lo);
     if size > offset {
@@ -164,7 +164,7 @@ fn cast_target(cls: &[Option<Class>], size: Size) -> CastTarget {
         }
     }
     assert_eq!(reg_component(cls, &mut i, Size::ZERO), None);
-    target
+    Some(target)
 }
 
 const MAX_INT_REGS: usize = 6; // RDI, RSI, RDX, RCX, R8, R9
@@ -227,7 +227,9 @@ where
                 // split into sized chunks passed individually
                 if arg.layout.is_aggregate() {
                     let size = arg.layout.size;
-                    arg.cast_to(cast_target(cls, size))
+                    if let Some(cast_target) = cast_target(cls, size) {
+                        arg.cast_to(cast_target);
+                    }
                 } else {
                     arg.extend_integer_width_to(32);
                 }