diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 4cbe715..fe6ec88 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -5710,6 +5710,11 @@ static bool eliminateDeadSwitchCases(SwitchInst *SI, DomTreeUpdater *DTU, // optimization, such as lookup tables. if (SI->getNumCases() == AllNumCases - 1) { assert(NumUnknownBits > 1 && "Should be canonicalized to a branch"); + IntegerType *CondTy = cast<IntegerType>(Cond->getType()); + if (CondTy->getIntegerBitWidth() > 64 || + !DL.fitsInLegalInteger(CondTy->getIntegerBitWidth())) + return false; + uint64_t MissingCaseVal = 0; for (const auto &Case : SI->cases()) MissingCaseVal ^= Case.getCaseValue()->getValue().getLimitedValue(); |