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[ConstantRange] Add assertion for KnownBits validity; NFC

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Following the suggestion in D59475.

llvm-svn: 356346
This commit is contained in:
Nikita Popov 2019-03-17 21:25:32 +00:00
parent d423c075d2
commit 1135cfa6a7
1 changed files with 2 additions and 0 deletions
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2
lib/IR/ConstantRange.cpp
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@ -56,6 +56,8 @@ ConstantRange::ConstantRange(APInt L, APInt U)
ConstantRange ConstantRange::fromKnownBits(const KnownBits &Known, ConstantRange ConstantRange::fromKnownBits(const KnownBits &Known,
bool IsSigned) { bool IsSigned) {
assert(!Known.hasConflict() && "Expected valid KnownBits");
if (Known.isUnknown()) if (Known.isUnknown())
return ConstantRange(Known.getBitWidth(), /* full */ true); return ConstantRange(Known.getBitWidth(), /* full */ true);