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| author | Sanjay Patel <spatel@rotateright.com> | 2019-12-08 10:13:16 -0500 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2019-12-08 10:16:29 -0500 |
| commit | 1c4dd3ae2f34541e53ad0110f261421083bc0157 (patch) | |
| tree | 10a2e59ebcd0a2c4fba9d8532556282ff720c598 /llvm/lib/Analysis/InstructionSimplify.cpp | |
| parent | a05d7c278ee2a29aec73dbe5316e5cf2a2d190f8 (diff) | |
| download | bcm5719-llvm-1c4dd3ae2f34541e53ad0110f261421083bc0157.tar.gz bcm5719-llvm-1c4dd3ae2f34541e53ad0110f261421083bc0157.zip | |
[InstSimplify] fold copysign with negated operand, part 2
This is another transform suggested in PR44153:
https://bugs.llvm.org/show_bug.cgi?id=44153
Unlike rG12f39e0fede9, it doesn't look like the
backend matches this variant.
Diffstat (limited to 'llvm/lib/Analysis/InstructionSimplify.cpp')
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index d151b78f04c..22a76a05595 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -5091,7 +5091,9 @@ static Value *simplifyBinaryIntrinsic(Function *F, Value *Op0, Value *Op1, if (Op0 == Op1) return Op0; // copysign -X, X --> X - if (match(Op0, m_FNeg(m_Specific(Op1)))) + // copysign X, -X --> -X + if (match(Op0, m_FNeg(m_Specific(Op1))) || + match(Op1, m_FNeg(m_Specific(Op0)))) return Op1; break; case Intrinsic::maxnum: |
