add carryless_mul to replaced_intrinsics

folkertdev · folkertdev · commit ced05abcc995 · 2026-02-06T01:38:34.000+01:00
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -345,7 +345,14 @@ impl CodegenBackend for LlvmCodegenBackend {
     }
 
     fn replaced_intrinsics(&self) -> Vec<Symbol> {
-        vec![sym::unchecked_funnel_shl, sym::unchecked_funnel_shr, sym::carrying_mul_add]
+        let mut will_not_use_fallback =
+            vec![sym::unchecked_funnel_shl, sym::unchecked_funnel_shr, sym::carrying_mul_add];
+
+        if llvm_util::get_version() >= (22, 0, 0) {
+            will_not_use_fallback.push(sym::carryless_mul);
+        }
+
+        will_not_use_fallback
     }
 
     fn codegen_crate<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Box<dyn Any> {

Original file line number	Diff line number	Diff line change
`@@ -345,7 +345,14 @@ impl CodegenBackend for LlvmCodegenBackend {`
`345`	`345`	`}`
`346`	`346`
`347`	`347`	`fn replaced_intrinsics(&self) -> Vec<Symbol> {`
`348`		`- vec![sym::unchecked_funnel_shl, sym::unchecked_funnel_shr, sym::carrying_mul_add]`
	`348`	`+ let mut will_not_use_fallback =`
	`349`	`+ vec![sym::unchecked_funnel_shl, sym::unchecked_funnel_shr, sym::carrying_mul_add];`
	`350`	`+`
	`351`	`+ if llvm_util::get_version() >= (22, 0, 0) {`
	`352`	`+ will_not_use_fallback.push(sym::carryless_mul);`
	`353`	`+ }`
	`354`	`+`
	`355`	`+ will_not_use_fallback`
`349`	`356`	`}`
`350`	`357`
`351`	`358`	`fn codegen_crate<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Box<dyn Any> {`