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llvm-mirror/test/Transforms/SimplifyCFG/lifetime.ll
Rafael Espindola 03cd7c7b76 Add r134057 back, but splice the predecessor after the successors phi
nodes.

Original message:
Let simplify cfg simplify bb with only debug and lifetime intrinsics.

llvm-svn: 134182
2011-06-30 20:14:24 +00:00

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