Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/FunctionAttrs/int_sideeffect.ll

@@ -0,0 +1,21 @@
+; RUN: opt -S < %s -functionattrs | FileCheck %s
+
+declare void @llvm.sideeffect()
+
+; Don't add readnone or similar attributes when an @llvm.sideeffect() intrinsic
+; is present.
+
+; CHECK: define void @test() {
+define void @test() {
+    call void @llvm.sideeffect()
+    ret void
+}
+
+; CHECK: define void @loop() {
+define void @loop() {
+    br label %loop
+
+loop:
+    call void @llvm.sideeffect()
+    br label %loop
+}