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Fix crash when struct argument size is not a multiple of the pointer size

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Fixes #1200
This commit is contained in:
bjorn3 2021-12-15 16:53:35 +01:00
parent 057635b9da
commit f74cf39a74
1 changed files with 3 additions and 1 deletions
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4
src/abi/pass_mode.rs
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@ -117,7 +117,9 @@ impl<'tcx> ArgAbiExt<'tcx> for ArgAbi<'tcx, Ty<'tcx>> {
PassMode::Cast(cast) => cast_target_to_abi_params(cast),
PassMode::Indirect { attrs, extra_attrs: None, on_stack } => {
if on_stack {
let size = u32::try_from(self.layout.size.bytes()).unwrap();
// Abi requires aligning struct size to pointer size
let size = self.layout.size.align_to(tcx.data_layout.pointer_align.abi);
let size = u32::try_from(size.bytes()).unwrap();
smallvec![apply_arg_attrs_to_abi_param(
AbiParam::special(pointer_ty(tcx), ArgumentPurpose::StructArgument(size),),
attrs