rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Mark scalar layout unions so that backends that do not support partially initialized scalars can special case them.

Browse Source
This commit is contained in:
Oli Scherer
2022-03-03 12:02:12 +00:00
parent 2ed6786404
commit d32ce37a17
37 changed files with 356 additions and 288 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
compiler/rustc_codegen_ssa/src/mir/operand.rs
View File

@@ -207,11 +207,11 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
// Extract a scalar component from a pair.
(OperandValue::Pair(a_llval, b_llval), Abi::ScalarPair(a, b)) => {
if offset.bytes() == 0 {
assert_eq!(field.size, a.value.size(bx.cx()));
assert_eq!(field.size, a.size(bx.cx()));
OperandValue::Immediate(a_llval)
} else {
assert_eq!(offset, a.value.size(bx.cx()).align_to(b.value.align(bx.cx()).abi));
assert_eq!(field.size, b.value.size(bx.cx()));
assert_eq!(offset, a.size(bx.cx()).align_to(b.align(bx.cx()).abi));
assert_eq!(field.size, b.size(bx.cx()));
OperandValue::Immediate(b_llval)
}
}
@@ -316,7 +316,7 @@ impl<'a, 'tcx, V: CodegenObject> OperandValue<V> {
bug!("store_with_flags: invalid ScalarPair layout: {:#?}", dest.layout);
};
let ty = bx.backend_type(dest.layout);
let b_offset = a_scalar.value.size(bx).align_to(b_scalar.value.align(bx).abi);
let b_offset = a_scalar.size(bx).align_to(b_scalar.align(bx).abi);
let llptr = bx.struct_gep(ty, dest.llval, 0);
let val = bx.from_immediate(a);