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Implement xform: (X != 0) -> (bool)X

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6506 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-06-01 03:35:25 +00:00
parent 4d6404f762
commit 074d84c746
1 changed files with 3 additions and 0 deletions
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3
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -682,6 +682,9 @@ Instruction *InstCombiner::visitSetCondInst(BinaryOperator &I) {
// integers at the end of their ranges...
//
if (ConstantInt *CI = dyn_cast<ConstantInt>(Op1)) {
if (CI->isNullValue() && I.getOpcode() == Instruction::SetNE)
return new CastInst(Op0, Type::BoolTy, I.getName());
// Check to see if we are comparing against the minimum or maximum value...
if (CI->isMinValue()) {
if (I.getOpcode() == Instruction::SetLT) // A < MIN -> FALSE