Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.731 -> 1.732 --- Log message: implement Transforms/InstCombine/malloc2.ll and PR1313: http://llvm.org/PR1313 --- Diffs of the changes: (+11 -1) InstructionCombining.cpp | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletion(-) Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.731 llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.732 --- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.731 Wed Apr 4 14:16:42 2007 +++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Fri Apr 6 13:57:34 2007 @@ -4744,7 +4744,7 @@ if (Instruction *NV = FoldOpIntoPhi(I)) return NV; break; - case Instruction::Select: + case Instruction::Select: { // If either operand of the select is a constant, we can fold the // comparison into the select arms, which will cause one to be // constant folded and the select turned into a bitwise or. @@ -4771,6 +4771,16 @@ return new SelectInst(LHSI->getOperand(0), Op1, Op2); break; } + case Instruction::Malloc: + // If we have (malloc != null), and if the malloc has a single use, we + // can assume it is successful and remove the malloc. + if (LHSI->hasOneUse() && isa<ConstantPointerNull>(RHSC)) { + AddToWorkList(LHSI); + return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty, + !isTrueWhenEqual(I))); + } + break; + } } // If we can optimize a 'icmp GEP, P' or 'icmp P, GEP', do so now. _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
