diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index fce2cf211cd..d5c6ff8cad2 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -2105,7 +2105,6 @@ InnerLoopVectorizer::vectorizeBlockInLoop(LoopVectorizationLegality *Legal, // optimizations will clean it up. unsigned NumIncoming = P->getNumIncomingValues(); - assert(NumIncoming > 1 && "Invalid PHI"); // Generate a sequence of selects of the form: // SELECT(Mask3, In3, @@ -2117,10 +2116,11 @@ InnerLoopVectorizer::vectorizeBlockInLoop(LoopVectorizationLegality *Legal, VectorParts &In0 = getVectorValue(P->getIncomingValue(In)); for (unsigned part = 0; part < UF; ++part) { - // We don't need to 'select' the first PHI operand because it is - // the default value if all of the other masks don't match. + // We might have single edge PHIs (blocks) - use an identity + // 'select' for the first PHI operand. if (In == 0) - Entry[part] = In0[part]; + Entry[part] = Builder.CreateSelect(Cond[part], In0[part], + In0[part]); else // Select between the current value and the previous incoming edge // based on the incoming mask. |
