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Fix undefined behavior (left shift by 64 bits) in ScaledNumber::toString().
This bug is reported by UBSan. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216116 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -220,6 +220,9 @@ std::string ScaledNumberBase::toString(uint64_t D, int16_t E, int Width,
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} else if (E > -64) {
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Above0 = D >> -E;
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Below0 = D << (64 + E);
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} else if (E == -64) {
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// Special case: shift by 64 bits is undefined behavior.
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Below0 = D;
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} else if (E > -120) {
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Below0 = D >> (-E - 64);
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Extra = D << (128 + E);
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