forked from OSchip/llvm-project
30 lines
604 B
LLVM
30 lines
604 B
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
|
|
|
|
; Test that a lifetime intrinsic doesn't prevent us from simplifying this.
|
|
|
|
; CHECK: foo
|
|
; CHECK: entry:
|
|
; CHECK-NOT: bb0:
|
|
; CHECK-NOT: bb1:
|
|
; CHECK: ret
|
|
define void @foo(i1 %x) {
|
|
entry:
|
|
%a = alloca i8
|
|
call void @llvm.lifetime.start(i64 -1, i8* %a) nounwind
|
|
br i1 %x, label %bb0, label %bb1
|
|
|
|
bb0:
|
|
call void @llvm.lifetime.end(i64 -1, i8* %a) nounwind
|
|
br label %bb1
|
|
|
|
bb1:
|
|
call void @f()
|
|
ret void
|
|
}
|
|
|
|
declare void @f()
|
|
|
|
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
|
|
|
|
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
|