use_postinc_value_outside_loop.ll 1.2 KB

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  1. ; RUN: opt < %s -loop-reduce -S | \
  2. ; RUN: grep "add i32 %indvar630.ui, 1"
  3. ;
  4. ; Make sure that the use of the IV outside of the loop (the store) uses the
  5. ; post incremented value of the IV, not the preincremented value. This
  6. ; prevents the loop from having to keep the post and pre-incremented value
  7. ; around for the duration of the loop, adding a copy and an extra register
  8. ; to the loop.
  9. declare i1 @pred(i32)
  10. define void @test([700 x i32]* %nbeaux_.0__558, i32* %i_.16574) {
  11. then.0:
  12. br label %no_exit.2
  13. no_exit.2: ; preds = %no_exit.2, %then.0
  14. %indvar630.ui = phi i32 [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <i32> [#uses=3]
  15. %indvar630 = bitcast i32 %indvar630.ui to i32 ; <i32> [#uses=2]
  16. %gep.upgrd.1 = zext i32 %indvar630.ui to i64 ; <i64> [#uses=1]
  17. %tmp.38 = getelementptr [700 x i32], [700 x i32]* %nbeaux_.0__558, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
  18. store i32 0, i32* %tmp.38
  19. %inc.2 = add i32 %indvar630, 2 ; <i32> [#uses=1]
  20. %tmp.34 = call i1 @pred( i32 %indvar630 ) ; <i1> [#uses=1]
  21. %indvar.next631 = add i32 %indvar630.ui, 1 ; <i32> [#uses=1]
  22. br i1 %tmp.34, label %no_exit.2, label %loopexit.2.loopexit
  23. loopexit.2.loopexit: ; preds = %no_exit.2
  24. store i32 %inc.2, i32* %i_.16574
  25. ret void
  26. }