Implement _mm_prefetch as nop

bjorn3 · bjorn3 · commit 0dc13d7acb01 · 2024-01-09T23:38:55.000+01:00
diff --git a/src/intrinsics/llvm.rs b/src/intrinsics/llvm.rs
@@ -35,6 +35,10 @@ pub(crate) fn codegen_llvm_intrinsic_call<'tcx>(
     }
 
     match intrinsic {
+        "llvm.prefetch" => {
+            // Nothing to do. This is merely a perf hint.
+        }
+
         _ if intrinsic.starts_with("llvm.ctlz.v") => {
             intrinsic_args!(fx, args => (a); intrinsic);
 

Original file line number	Diff line number	Diff line change
`@@ -35,6 +35,10 @@ pub(crate) fn codegen_llvm_intrinsic_call<'tcx>(`
`35`	`35`	`}`
`36`	`36`
`37`	`37`	`match intrinsic {`
	`38`	`+ "llvm.prefetch" => {`
	`39`	`+ // Nothing to do. This is merely a perf hint.`
	`40`	`+ }`
	`41`	`+`
`38`	`42`	`_ if intrinsic.starts_with("llvm.ctlz.v") => {`
`39`	`43`	`intrinsic_args!(fx, args => (a); intrinsic);`
`40`	`44`