Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.768 -> 1.769 --- Log message: Fix PR1499: http://llvm.org/PR1499 . --- Diffs of the changes: (+4 -0) InstructionCombining.cpp | 4 ++++ 1 files changed, 4 insertions(+) Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.768 llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.769 --- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.768 Tue May 22 20:17:04 2007 +++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Wed Jun 6 12:08:48 2007 @@ -1346,6 +1346,10 @@ // Signed shift right. APInt DemandedMaskIn(DemandedMask.shl(ShiftAmt)); + // If any of the "high bits" are demanded, we should set the sign bit as + // demanded. + if (DemandedMask.countLeadingZeros() <= ShiftAmt) + DemandedMaskIn.set(BitWidth-1); if (SimplifyDemandedBits(I->getOperand(0), DemandedMaskIn, RHSKnownZero, RHSKnownOne, Depth+1)) _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
