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view test/Transforms/GVN/basic-undef-test.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 afa8332a0e37
children
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; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
; ModuleID = 'test3.ll'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"

define i32 @main(i32 *%foo)  {
entry:
; CHECK: load i32, i32* %foo, align 4
  %0 = load i32, i32* %foo, align 4
  store i32 5, i32* undef, align 4
; CHECK-NOT: load i32, i32* %foo, align 4
  %1 = load i32, i32* %foo, align 4
; CHECK: add i32 %0, %0
  %2 = add i32 %0, %1
  ret i32 %2
}