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DirectXShaderCompiler
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DirectXShaderCo...
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test
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Transforms
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LoopUnroll
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partial-unroll-optsize.ll

partial-unroll-optsize.ll 1.1 KB
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  1. ; RUN: opt < %s -S -loop-unroll -unroll-allow-partial | FileCheck %s
    2. 

  2. ; Loop size = 3, when the function has the optsize attribute, the
    3. 

  3. ; OptSizeUnrollThreshold, i.e. 50, is used, hence the loop should be unrolled
    4. 

  4. ; by 32 times because (1 * 32) + 2 < 50 (whereas (1 * 64 + 2) is not).
    5. 

  5. define void @unroll_opt_for_size() nounwind optsize {
    6. 

  6. entry:
    7. 

  7.   br label %loop
    8. 

  8. 

  9. loop:
    10. 

  10.   %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
    11. 

  11.   %inc = add i32 %iv, 1
    12. 

  12.   %exitcnd = icmp uge i32 %inc, 1024
    13. 

  13.   br i1 %exitcnd, label %exit, label %loop
    14. 

  14. 

  15. exit:
    16. 

  16.   ret void
    17. 

  17. }
    18. 

  18. 

  19. ; CHECK:      add
    20. 

  20. ; CHECK-NEXT: add
    21. 

  21. ; CHECK-NEXT: add
    22. 

  22. ; CHECK-NEXT: add
    23. 

  23. ; CHECK-NEXT: add
    24. 

  24. ; CHECK-NEXT: add
    25. 

  25. ; CHECK-NEXT: add
    26. 

  26. ; CHECK-NEXT: add
    27. 

  27. ; CHECK-NEXT: add
    28. 

  28. ; CHECK-NEXT: add
    29. 

  29. ; CHECK-NEXT: add
    30. 

  30. ; CHECK-NEXT: add
    31. 

  31. ; CHECK-NEXT: add
    32. 

  32. ; CHECK-NEXT: add
    33. 

  33. ; CHECK-NEXT: add
    34. 

  34. ; CHECK-NEXT: add
    35. 

  35. ; CHECK-NEXT: add
    36. 

  36. ; CHECK-NEXT: add
    37. 

  37. ; CHECK-NEXT: add
    38. 

  38. ; CHECK-NEXT: add
    39. 

  39. ; CHECK-NEXT: add
    40. 

  40. ; CHECK-NEXT: add
    41. 

  41. ; CHECK-NEXT: add
    42. 

  42. ; CHECK-NEXT: add
    43. 

  43. ; CHECK-NEXT: add
    44. 

  44. ; CHECK-NEXT: add
    45. 

  45. ; CHECK-NEXT: add
    46. 

  46. ; CHECK-NEXT: add
    47. 

  47. ; CHECK-NEXT: add
    48. 

  48. ; CHECK-NEXT: add
    49. 

  49. ; CHECK-NEXT: add
    50. 

  50. ; CHECK-NEXT: add
    51. 

  51. ; CHECK-NEXT: icmp
    52. 

  52.