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Do normalize when computing struct tails in codegen

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This commit is contained in:
Michael Goulet 2024-08-05 15:25:40 -04:00
parent d3a393932e
commit 85b5e42d5e
2 changed files with 4 additions and 3 deletions
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5
compiler/rustc_codegen_llvm/src/builder.rs
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@ -12,7 +12,8 @@
use rustc_hir::def_id::DefId;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
use rustc_middle::ty::layout::{
FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers, TyAndLayout,
FnAbiError, FnAbiOfHelpers, FnAbiRequest, HasParamEnv, LayoutError, LayoutOfHelpers,
TyAndLayout,
};
use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
use rustc_sanitizers::{cfi, kcfi};
@ -531,7 +532,7 @@ fn atomic_load(
#[instrument(level = "trace", skip(self))]
fn load_operand(&mut self, place: PlaceRef<'tcx, &'ll Value>) -> OperandRef<'tcx, &'ll Value> {
if place.layout.is_unsized() {
let tail = self.tcx.struct_tail_with_normalize(place.layout.ty, |ty| ty, || {});
let tail = self.tcx.struct_tail_erasing_lifetimes(place.layout.ty, self.param_env());
if matches!(tail.kind(), ty::Foreign(..)) {
// Unsized locals and, at least conceptually, even unsized arguments must be copied
// around, which requires dynamically determining their size. Therefore, we cannot

2
compiler/rustc_ty_utils/src/abi.rs
View File

@ -549,7 +549,7 @@ fn fn_arg_sanity_check<'tcx>(
// With metadata. Must be unsized and not on the stack.
assert!(arg.layout.is_unsized() && !on_stack);
// Also, must not be `extern` type.
let tail = cx.tcx.struct_tail_with_normalize(arg.layout.ty, |ty| ty, || {});
let tail = cx.tcx.struct_tail_erasing_lifetimes(arg.layout.ty, cx.param_env());
if matches!(tail.kind(), ty::Foreign(..)) {
// These types do not have metadata, so having `meta_attrs` is bogus.
// Conceptually, unsized arguments must be copied around, which requires dynamically