diff options
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/TargetTransformInfo.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp index 25ebcdec3be..79fe6dc7d87 100644 --- a/llvm/lib/Analysis/TargetTransformInfo.cpp +++ b/llvm/lib/Analysis/TargetTransformInfo.cpp @@ -399,6 +399,13 @@ TargetTransformInfo::getOperandInfo(Value *V, OperandValueProperties &OpProps) { return OK_UniformConstantValue; } + // A broadcast shuffle creates a uniform value. + // TODO: Add support for non-zero index broadcasts. + // TODO: Add support for different source vector width. + if (auto *ShuffleInst = dyn_cast<ShuffleVectorInst>(V)) + if (ShuffleInst->isZeroEltSplat()) + OpInfo = OK_UniformValue; + const Value *Splat = getSplatValue(V); // Check for a splat of a constant or for a non uniform vector of constants |
