Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98
2018-10-19 08:34:24 +00:00
parent 37fbf886a3
commit e19d552987
28702 changed files with 3868076 additions and 803 deletions
--- a/external/llvm/test/Transforms/SimplifyCFG/lifetime.ll
+++ b/external/llvm/test/Transforms/SimplifyCFG/lifetime.ll
@@ -0,0 +1,29 @@
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
+
+; Test that a lifetime intrinsic isn't removed because that would change semantics
+
+; CHECK: foo
+; CHECK: entry:
+; CHECK: bb0:
+; CHECK: bb1:
+; CHECK: ret
+define void @foo(i1 %x) {
+entry:
+  %a = alloca i8
+  call void @llvm.lifetime.start.p0i8(i64 -1, i8* %a) nounwind
+  br i1 %x, label %bb0, label %bb1
+
+bb0:
+  call void @llvm.lifetime.end.p0i8(i64 -1, i8* %a) nounwind
+  br label %bb1
+
+bb1:
+  call void @f()
+  ret void
+}
+
+declare void @f()
+
+declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind
+
+declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind