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Use correct offset when codegening mir::Const::Indirect.

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This commit is contained in:
Camille GILLOT 2023-09-23 09:35:44 +00:00
parent 6992405674
commit ac0683b783
1 changed files with 11 additions and 12 deletions
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23
compiler/rustc_codegen_ssa/src/mir/operand.rs
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@ -135,15 +135,14 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
assert_eq!(alloc_align, layout.align.abi);
let read_scalar = |start, size, s: abi::Scalar, ty| {
let val = alloc
.0
.read_scalar(
bx,
alloc_range(start, size),
/*read_provenance*/ matches!(s.primitive(), abi::Pointer(_)),
)
.unwrap();
bx.scalar_to_backend(val, s, ty)
match alloc.0.read_scalar(
bx,
alloc_range(start, size),
/*read_provenance*/ matches!(s.primitive(), abi::Pointer(_)),
) {
Ok(val) => bx.scalar_to_backend(val, s, ty),
Err(_) => bx.const_poison(ty),
}
};
// It may seem like all types with `Scalar` or `ScalarPair` ABI are fair game at this point.
@ -156,7 +155,7 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
Abi::Scalar(s @ abi::Scalar::Initialized { .. }) => {
let size = s.size(bx);
assert_eq!(size, layout.size, "abi::Scalar size does not match layout size");
let val = read_scalar(Size::ZERO, size, s, bx.backend_type(layout));
let val = read_scalar(offset, size, s, bx.backend_type(layout));
OperandRef { val: OperandValue::Immediate(val), layout }
}
Abi::ScalarPair(
@ -164,10 +163,10 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
b @ abi::Scalar::Initialized { .. },
) => {
let (a_size, b_size) = (a.size(bx), b.size(bx));
let b_offset = a_size.align_to(b.align(bx).abi);
let b_offset = (offset + a_size).align_to(b.align(bx).abi);
assert!(b_offset.bytes() > 0);
let a_val = read_scalar(
Size::ZERO,
offset,
a_size,
a,
bx.scalar_pair_element_backend_type(layout, 0, true),