aa2009fe78
First step after e113317958,
in these tests, DomTree is valid afterwards, so mark them as such,
so that they don't regress.
In further steps, SimplifyCFG transforms shall taught to preserve DomTree,
in as small steps as possible.
30 lines
668 B
LLVM
30 lines
668 B
LLVM
; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -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
|