From 0fcea3db28ad738ae2fe8c0cf871450d8492e5b0 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Fri, 30 May 2025 09:39:43 +0000
Subject: Avoid computing function type for intrinsic instances

---
 compiler/rustc_codegen_llvm/src/intrinsic.rs | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

(limited to 'compiler/rustc_codegen_llvm')

diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs
index 2e31f6b3649..30a924ef158 100644
--- a/compiler/rustc_codegen_llvm/src/intrinsic.rs
+++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs
@@ -169,13 +169,9 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
         span: Span,
     ) -> Result<(), ty::Instance<'tcx>> {
         let tcx = self.tcx;
-        let callee_ty = instance.ty(tcx, self.typing_env());
 
-        let ty::FnDef(def_id, fn_args) = *callee_ty.kind() else {
-            bug!("expected fn item type, found {}", callee_ty);
-        };
-
-        let name = tcx.item_name(def_id);
+        let name = tcx.item_name(instance.def_id());
+        let fn_args = instance.args;
 
         let simple = get_simple_intrinsic(self, name);
         let llval = match name {
-- 
cgit 1.4.1-3-g733a5