malloc-promote-1.ll 797 B

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  1. ; RUN: opt < %s -globalopt -S | FileCheck %s
  2. target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
  3. @G = internal global i32* null ; <i32**> [#uses=3]
  4. ; CHECK-NOT: global
  5. define void @init() {
  6. %malloccall = tail call i8* @malloc(i64 4) ; <i8*> [#uses=1]
  7. %P = bitcast i8* %malloccall to i32* ; <i32*> [#uses=1]
  8. store i32* %P, i32** @G
  9. %GV = load i32*, i32** @G ; <i32*> [#uses=1]
  10. store i32 0, i32* %GV
  11. ret void
  12. }
  13. declare noalias i8* @malloc(i64)
  14. define i32 @get() {
  15. %GV = load i32*, i32** @G ; <i32*> [#uses=1]
  16. %V = load i32, i32* %GV ; <i32> [#uses=1]
  17. ret i32 %V
  18. ; CHECK: ret i32 0
  19. }