Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.504 -> 1.505 --- Log message: Fix Transforms/InstCombine/2006-09-15-CastToBool.ll and PR913: http://llvm.org/PR913 --- Diffs of the changes: (+5 -0) InstructionCombining.cpp | 5 +++++ 1 files changed, 5 insertions(+) Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.504 llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.505 --- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.504 Mon Sep 11 16:43:16 2006 +++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Fri Sep 15 22:14:10 2006 @@ -1011,6 +1011,11 @@ // If this is an integer truncate or noop, just look in the input. if (SrcTy->getPrimitiveSizeInBits() >= I->getType()->getPrimitiveSizeInBits()) { + // Cast to bool is a comparison against 0, which demands all bits. We + // can't propagate anything useful up. + if (I->getType() == Type::BoolTy) + break; + if (SimplifyDemandedBits(I->getOperand(0), DemandedMask, KnownZero, KnownOne, Depth+1)) return true; _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
