select_promote.ll 698 B

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  1. ; Test promotion of loads that use the result of a select instruction. This
  2. ; should be simplified by the instcombine pass.
  3. ; RUN: opt < %s -instcombine -mem2reg -S | not grep alloca
  4. define i32 @main() {
  5. %mem_tmp.0 = alloca i32 ; <i32*> [#uses=3]
  6. %mem_tmp.1 = alloca i32 ; <i32*> [#uses=3]
  7. store i32 0, i32* %mem_tmp.0
  8. store i32 1, i32* %mem_tmp.1
  9. %tmp.1.i = load i32, i32* %mem_tmp.1 ; <i32> [#uses=1]
  10. %tmp.3.i = load i32, i32* %mem_tmp.0 ; <i32> [#uses=1]
  11. %tmp.4.i = icmp sle i32 %tmp.1.i, %tmp.3.i ; <i1> [#uses=1]
  12. %mem_tmp.i.0 = select i1 %tmp.4.i, i32* %mem_tmp.1, i32* %mem_tmp.0 ; <i32*> [#uses=1]
  13. %tmp.3 = load i32, i32* %mem_tmp.i.0 ; <i32> [#uses=1]
  14. ret i32 %tmp.3
  15. }