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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-09 00:13:41 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-09 00:13:41 +0000 |
| commit | 935e35d2b9f889566207b76a7026b63a1619742c (patch) | |
| tree | cc26ce74146b052bea87a9ca28314767d6cef72b /lib/Transforms/InstCombine/InstructionCombining.cpp | |
| parent | b6714227eda5d499f7667fc865f931126a8dc488 (diff) | |
| download | llvm-935e35d2b9f889566207b76a7026b63a1619742c.tar.gz llvm-935e35d2b9f889566207b76a7026b63a1619742c.tar.bz2 llvm-935e35d2b9f889566207b76a7026b63a1619742c.tar.xz | |
Consider expression "0.0 - X" as the negation of X if
- this expression is explicitly marked no-signed-zero, or
- no-signed-zero of this expression can be derived from some context.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171922 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/InstCombine/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstructionCombining.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp index 6f24cdd738..dc7fe5cf6b 100644 --- a/lib/Transforms/InstCombine/InstructionCombining.cpp +++ b/lib/Transforms/InstCombine/InstructionCombining.cpp @@ -516,8 +516,8 @@ Value *InstCombiner::dyn_castNegVal(Value *V) const { // instruction if the LHS is a constant negative zero (which is the 'negate' // form). // -Value *InstCombiner::dyn_castFNegVal(Value *V) const { - if (BinaryOperator::isFNeg(V)) +Value *InstCombiner::dyn_castFNegVal(Value *V, bool IgnoreZeroSign) const { + if (BinaryOperator::isFNeg(V, IgnoreZeroSign)) return BinaryOperator::getFNegArgument(V); // Constants can be considered to be negated values if they can be folded. |