diff options
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 00123788f2f..b566a70ceaa 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -4932,6 +4932,10 @@ static SelectPatternResult matchSelectPattern(CmpInst::Predicate Pred, if (Pred == ICmpInst::ICMP_SGT && match(CmpRHS, ZeroOrAllOnes)) return {SPF_ABS, SPNB_NA, false}; + // (X >=s 0) ? X : -X or (X >=s 1) ? X : -X --> ABS(X) + if (Pred == ICmpInst::ICMP_SGE && match(CmpRHS, ZeroOrOne)) + return {SPF_ABS, SPNB_NA, false}; + // (X <s 0) ? X : -X or (X <s 1) ? X : -X --> NABS(X) // (-X <s 0) ? -X : X or (-X <s 1) ? -X : X --> NABS(X) if (Pred == ICmpInst::ICMP_SLT && match(CmpRHS, ZeroOrOne)) |
