llvm/llvm/test/Transforms/GVN/lifetime-simple.ll

; RUN: opt < %s -passes=gvn -S | FileCheck %s

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin7"

define i8 @test(ptr %P) nounwind {
; CHECK: lifetime.start
; CHECK-NOT: load
; CHECK: lifetime.end
entry:
  call void @llvm.lifetime.start.p0(i64 32, ptr %P)
  %0 = load i8, ptr %P
  store i8 1, ptr %P
  call void @llvm.lifetime.end.p0(i64 32, ptr %P)
  %1 = load i8, ptr %P
  ret i8 %1
}

declare void @llvm.lifetime.start.p0(i64 %S, ptr nocapture %P) readonly
declare void @llvm.lifetime.end.p0(i64 %S, ptr nocapture %P)