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These should be rewritten to fold without using the 'Rules' mechanism, but

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until this happens at least make sext from bool and sitofp from bool do the
right thing.

llvm-svn: 32087
This commit is contained in:
Chris Lattner 2006-12-01 19:50:54 +00:00
parent f6a48f7ea5
commit 64b24381a8
1 changed files with 3 additions and 0 deletions
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3
lib/VMCore/ConstantFolding.cpp
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@ -890,6 +890,9 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V,
if (isa<ConstantInt>(V))
V = ConstantInt::get(SrcTy->getSignedVersion(),
cast<ConstantIntegral>(V)->getSExtValue());
else if (const ConstantBool *CB = dyn_cast<ConstantBool>(V))
V = ConstantInt::get(Type::SByteTy, CB->getValue() ? -1 : 0);
break;
case Instruction::Trunc:
// We just handle trunc directly here. The code below doesn't work for