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Fix a bug that was found by building clang with -fsanitize.
I introduced it in r166785. PR14291. If TD is unavailable use getScalarSizeInBits, but don't optimize pointers or vectors of pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170586 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -433,7 +433,12 @@ void llvm::ComputeMaskedBits(Value *V, APInt &KnownZero, APInt &KnownOne,
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unsigned SrcBitWidth;
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// Note that we handle pointer operands here because of inttoptr/ptrtoint
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// which fall through here.
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if(TD) {
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SrcBitWidth = TD->getTypeSizeInBits(SrcTy->getScalarType());
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} else {
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SrcBitWidth = SrcTy->getScalarSizeInBits();
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if (!SrcBitWidth) return;
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}
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assert(SrcBitWidth && "SrcBitWidth can't be zero");
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KnownZero = KnownZero.zextOrTrunc(SrcBitWidth);
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