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Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 0585a63..0e07017 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -396,6 +396,14 @@ unsigned llvm::ComputeNumSignBits(const Value *V, const DataLayout &DL, V, Depth, Query(DL, AC, safeCxtI(V, CxtI), DT, UseInstrInfo)); } +unsigned llvm::ComputeMinSignedBits(const Value *V, const DataLayout &DL, + unsigned Depth, AssumptionCache *AC, + const Instruction *CxtI, + const DominatorTree *DT) { + unsigned SignBits = ComputeNumSignBits(V, DL, Depth, AC, CxtI, DT); + return V->getType()->getScalarSizeInBits() - SignBits + 1; +} + static void computeKnownBitsAddSub(bool Add, const Value *Op0, const Value *Op1, bool NSW, const APInt &DemandedElts, KnownBits &KnownOut, KnownBits &Known2, |