diff options
| author | Chen Zheng <shchenz@cn.ibm.com> | 2018-07-16 02:23:00 +0000 |
|---|---|---|
| committer | Chen Zheng <shchenz@cn.ibm.com> | 2018-07-16 02:23:00 +0000 |
| commit | ccc84224644e267fce8b70e32833b887f4e12a61 (patch) | |
| tree | b0de6e3467e292939aa385041e10c8c2b751e1f7 /llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | |
| parent | 734e3928b355aef644b6646741f87bc55fd2a27d (diff) | |
| download | bcm5719-llvm-ccc84224644e267fce8b70e32833b887f4e12a61.tar.gz bcm5719-llvm-ccc84224644e267fce8b70e32833b887f4e12a61.zip | |
[InstCombine] add more SPFofSPF folding
Differential Revision: https://reviews.llvm.org/D49238
llvm-svn: 337143
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp index c88270fa0ea..108d29ab0d6 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -810,6 +810,11 @@ static Instruction *canonicalizeAbsNabs(SelectInst &Sel, ICmpInst &Cmp, if (SPF != SelectPatternFlavor::SPF_ABS && SPF != SelectPatternFlavor::SPF_NABS) return nullptr; + + // TODO: later canonicalization change will move this condition check. + // Without this check, following assert will be hit. + if (match(Cmp.getOperand(0), m_Sub(m_Value(), m_Value()))) + return nullptr; // Is this already canonical? if (match(Cmp.getOperand(1), m_ZeroInt()) && |
