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| author | Roman Lebedev <lebedev.ri@gmail.com> | 2019-09-25 22:59:59 +0000 |
|---|---|---|
| committer | Roman Lebedev <lebedev.ri@gmail.com> | 2019-09-25 22:59:59 +0000 |
| commit | a2fa03af3ab961e718d295c6dbdbde3ac4ae8dd8 (patch) | |
| tree | e097a7fb6887091ed4a1bfa1f379dab3de4f0d0f /llvm/test | |
| parent | ca524621d14cd35c4cc226e53ccf3be403bdfc37 (diff) | |
| download | bcm5719-llvm-a2fa03af3ab961e718d295c6dbdbde3ac4ae8dd8.tar.gz bcm5719-llvm-a2fa03af3ab961e718d295c6dbdbde3ac4ae8dd8.zip | |
[InstCombine] foldUnsignedUnderflowCheck(): one last pattern with 'sub' (PR43251)
https://rise4fun.com/Alive/0j9
llvm-svn: 372930
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/result-of-usub-is-non-zero-and-no-overflow.ll | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/llvm/test/Transforms/InstCombine/result-of-usub-is-non-zero-and-no-overflow.ll b/llvm/test/Transforms/InstCombine/result-of-usub-is-non-zero-and-no-overflow.ll index ad60ad98788..d46da5ec863 100644 --- a/llvm/test/Transforms/InstCombine/result-of-usub-is-non-zero-and-no-overflow.ll +++ b/llvm/test/Transforms/InstCombine/result-of-usub-is-non-zero-and-no-overflow.ll @@ -404,10 +404,8 @@ define i1 @base_ult_offset(i8 %base, i8 %offset) { ; CHECK-LABEL: @base_ult_offset( ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) -; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 -; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]] -; CHECK-NEXT: [[R:%.*]] = and i1 [[NO_UNDERFLOW]], [[NOT_NULL]] -; CHECK-NEXT: ret i1 [[R]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]] +; CHECK-NEXT: ret i1 [[TMP1]] ; %adjusted = sub i8 %base, %offset call void @use8(i8 %adjusted) @@ -420,10 +418,8 @@ define i1 @base_uge_offset(i8 %base, i8 %offset) { ; CHECK-LABEL: @base_uge_offset( ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) -; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0 -; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] -; CHECK-NEXT: [[R:%.*]] = or i1 [[NO_UNDERFLOW]], [[NOT_NULL]] -; CHECK-NEXT: ret i1 [[R]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] +; CHECK-NEXT: ret i1 [[TMP1]] ; %adjusted = sub i8 %base, %offset call void @use8(i8 %adjusted) |
