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view test/Transforms/NewGVN/lifetime-simple.ll @ 146:3fc4d5c3e21e

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set tail call flag for code segment in CGCAll
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sun, 23 Dec 2018 19:23:36 +0900
parents 803732b1fca8
children
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; RUN: opt < %s -basicaa -newgvn -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(i8* %P) nounwind {
; CHECK: lifetime.start
; CHECK-NOT: load
; CHECK: lifetime.end
entry:
  call void @llvm.lifetime.start.p0i8(i64 32, i8* %P)
  %0 = load i8, i8* %P
  store i8 1, i8* %P
  call void @llvm.lifetime.end.p0i8(i64 32, i8* %P)
  %1 = load i8, i8* %P
  ret i8 %1
}

declare void @llvm.lifetime.start.p0i8(i64 %S, i8* nocapture %P) readonly
declare void @llvm.lifetime.end.p0i8(i64 %S, i8* nocapture %P)