diff options
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 0343635270..ab6262b47e 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -1949,7 +1949,8 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) { if (RHSC->isNullValue()) return ReplaceInstUsesWith(I, LHS); } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(RHSC)) { - if (CFP->isExactlyValue(-0.0)) + if (CFP->isExactlyValue(ConstantFP::getNegativeZero + (I.getType())->getValueAPF())) return ReplaceInstUsesWith(I, LHS); } @@ -2349,8 +2350,10 @@ Instruction *InstCombiner::visitMul(BinaryOperator &I) { // "In IEEE floating point, x*1 is not equivalent to x for nans. However, // ANSI says we can drop signals, so we can do this anyway." (from GCC) - if (Op1F->isExactlyValue(1.0)) - return ReplaceInstUsesWith(I, Op0); // Eliminate 'mul double %X, 1.0' + // We need a better interface for long double here. + if (Op1->getType() == Type::FloatTy || Op1->getType() == Type::DoubleTy) + if (Op1F->isExactlyValue(1.0)) + return ReplaceInstUsesWith(I, Op0); // Eliminate 'mul double %X, 1.0' } if (BinaryOperator *Op0I = dyn_cast<BinaryOperator>(Op0)) |