diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index f2fe8d5..9b91705 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -808,6 +808,8 @@ Instruction *InstCombiner::visitRem(BinaryOperator &I) { if (ConstantInt *RHS = dyn_cast<ConstantInt>(I.getOperand(1))) { if (RHS->equalsInt(1)) // X % 1 == 0 return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType())); + if (RHS->isAllOnesValue()) // X % -1 == 0 + return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType())); // Check to see if this is an unsigned remainder with an exact power of 2, // if so, convert to a bitwise and. |