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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-20 08:43:52 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-20 08:43:52 +0000 |
| commit | 82a1833865ce34c37a1d0d4b1eb45f730c8b9885 (patch) | |
| tree | 4d3c97bc1ab845586c6a9796e46e63f4e19657c2 /test/Transforms | |
| parent | bf8772ed2cc89a495e2692919331d7a03e76d791 (diff) | |
| download | external_llvm-82a1833865ce34c37a1d0d4b1eb45f730c8b9885.zip external_llvm-82a1833865ce34c37a1d0d4b1eb45f730c8b9885.tar.gz external_llvm-82a1833865ce34c37a1d0d4b1eb45f730c8b9885.tar.bz2 | |
InstCombine: Fix an edge case where constant icmps could sneak into ConstantFoldInstOperands and crash.
Have to refactor the ConstantFolder interface one day to define bugs like this away. Fixes PR14131.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166374 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstCombine/select.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/select.ll b/test/Transforms/InstCombine/select.ll index 4baae26..cc3aacd 100644 --- a/test/Transforms/InstCombine/select.ll +++ b/test/Transforms/InstCombine/select.ll @@ -829,3 +829,37 @@ define i1 @test63(i1 %A, i1 %B) { ; CHECK: %C = or i1 %B, %not ; CHECK: ret i1 %C } + +; PR14131 +define void @test64(i32 %p, i16 %b) noreturn nounwind { +entry: + %p.addr.0.insert.mask = and i32 %p, -65536 + %conv2 = and i32 %p, 65535 + br i1 undef, label %lor.rhs, label %lor.end + +lor.rhs: + %p.addr.0.extract.trunc = trunc i32 %p.addr.0.insert.mask to i16 + %phitmp = zext i16 %p.addr.0.extract.trunc to i32 + br label %lor.end + +lor.end: + %t.1 = phi i32 [ 0, %entry ], [ %phitmp, %lor.rhs ] + %conv6 = zext i16 %b to i32 + %div = udiv i32 %conv6, %t.1 + %tobool8 = icmp eq i32 %div, 0 + %cmp = icmp eq i32 %t.1, 0 + %cmp12 = icmp ult i32 %conv2, 2 + %cmp.sink = select i1 %tobool8, i1 %cmp12, i1 %cmp + br i1 %cmp.sink, label %cond.end17, label %cond.false16 + +cond.false16: + br label %cond.end17 + +cond.end17: + br label %while.body + +while.body: + br label %while.body +; CHECK: @test64 +; CHECK-NOT: select +} |