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| author | Sanjay Patel <spatel@rotateright.com> | 2018-05-14 13:43:32 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-05-14 13:43:32 +0000 |
| commit | bf55e6dee136d081b0858f62fcc362d74a708894 (patch) | |
| tree | f9d4d6d2d7c440cde8fda1711cbc39744cfe3f3e /llvm/test | |
| parent | 8f2b2f4e048522b542b5dd948acfc4eca33fd14b (diff) | |
| download | bcm5719-llvm-bf55e6dee136d081b0858f62fcc362d74a708894.tar.gz bcm5719-llvm-bf55e6dee136d081b0858f62fcc362d74a708894.zip | |
[AggressiveInstCombine] avoid crashing on unsimplified code (PR37446)
This bug:
https://bugs.llvm.org/show_bug.cgi?id=37446
...raises another question: why do we run aggressive-instcombine before
regular instcombine?
llvm-svn: 332243
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/AggressiveInstCombine/masked-cmp.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/test/Transforms/AggressiveInstCombine/masked-cmp.ll b/llvm/test/Transforms/AggressiveInstCombine/masked-cmp.ll index e03fb338bb4..3d82fe53e6e 100644 --- a/llvm/test/Transforms/AggressiveInstCombine/masked-cmp.ll +++ b/llvm/test/Transforms/AggressiveInstCombine/masked-cmp.ll @@ -217,3 +217,19 @@ define i64 @allset_40_bit_mask(i64 %x) { ret i64 %a40 } +; Verify that unsimplified code doesn't crash: +; https://bugs.llvm.org/show_bug.cgi?id=37446 + +define i32 @PR37446(i32 %x) { +; CHECK-LABEL: @PR37446( +; CHECK-NEXT: [[SHR:%.*]] = lshr i32 1, 33 +; CHECK-NEXT: [[AND:%.*]] = and i32 [[SHR]], 15 +; CHECK-NEXT: [[AND1:%.*]] = and i32 [[AND]], [[X:%.*]] +; CHECK-NEXT: ret i32 [[AND1]] +; + %shr = lshr i32 1, 33 + %and = and i32 %shr, 15 + %and1 = and i32 %and, %x + ret i32 %and1 +} + |
