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Avoid computing function type for intrinsic instances

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This commit is contained in:
bjorn3
2025-05-30 09:39:43 +00:00
parent 38a6daeb23
commit 0fcea3db28
3 changed files with 13 additions and 22 deletions
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16
compiler/rustc_codegen_ssa/src/mir/intrinsic.rs
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@@ -1,7 +1,7 @@
use rustc_abi::WrappingRange;
use rustc_middle::bug;
use rustc_middle::mir::SourceInfo;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::{bug, span_bug};
use rustc_session::config::OptLevel;
use rustc_span::sym;
@@ -60,14 +60,10 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
source_info: SourceInfo,
) -> Result<(), ty::Instance<'tcx>> {
let span = source_info.span;
let callee_ty = instance.ty(bx.tcx(), bx.typing_env());
let ty::FnDef(def_id, fn_args) = *callee_ty.kind() else {
span_bug!(span, "expected fn item type, found {}", callee_ty);
};
let name = bx.tcx().item_name(def_id);
let name = bx.tcx().item_name(instance.def_id());
let name_str = name.as_str();
let fn_args = instance.args;
// If we're swapping something that's *not* an `OperandValue::Ref`,
// then we can do it directly and avoid the alloca.
@@ -137,7 +133,11 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
sym::vtable_align => ty::COMMON_VTABLE_ENTRIES_ALIGN,
_ => bug!(),
};
let value = meth::VirtualIndex::from_index(idx).get_usize(bx, vtable, callee_ty);
let value = meth::VirtualIndex::from_index(idx).get_usize(
bx,
vtable,
instance.ty(bx.tcx(), bx.typing_env()),
);
match name {
// Size is always <= isize::MAX.
sym::vtable_size => {