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Revert last patch. ConstantInt isn't quite ready for signlessness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32650 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -875,14 +875,16 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V,
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// A ZExt always produces an unsigned value so we need to cast the value
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// now before we try to cast it to the destination type
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if (isa<ConstantInt>(V))
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V = ConstantInt::get(SrcTy, cast<ConstantIntegral>(V)->getZExtValue());
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V = ConstantInt::get(SrcTy->getUnsignedVersion(),
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cast<ConstantIntegral>(V)->getZExtValue());
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break;
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case Instruction::SIToFP:
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case Instruction::SExt:
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// A SExt always produces a signed value so we need to cast the value
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// now before we try to cast it to the destiniation type.
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if (isa<ConstantInt>(V))
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V = ConstantInt::get(SrcTy, cast<ConstantIntegral>(V)->getSExtValue());
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V = ConstantInt::get(SrcTy->getSignedVersion(),
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cast<ConstantIntegral>(V)->getSExtValue());
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else if (const ConstantBool *CB = dyn_cast<ConstantBool>(V))
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V = ConstantInt::get(Type::SByteTy, CB->getValue() ? -1 : 0);
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