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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-07-11 17:51:27 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-07-11 17:51:27 +0000 |
| commit | 667a5b541fac4930898b2a75541781f4201f106d (patch) | |
| tree | 63bc76eb8b550c3943d50ded1b2f969e7be8e540 /llvm/lib/Analysis/TargetTransformInfo.cpp | |
| parent | a2125b12ec22e073f5b300b395a4bcc47d79153d (diff) | |
| download | bcm5719-llvm-667a5b541fac4930898b2a75541781f4201f106d.tar.gz bcm5719-llvm-667a5b541fac4930898b2a75541781f4201f106d.zip | |
[TargetTransformInfo] Add pow2 analysis for scalar constants
Add ConstantInt analysis to getOperandInfo so we get more realistic div/rem expansion costs comparable to the vector costs.
llvm-svn: 336827
Diffstat (limited to 'llvm/lib/Analysis/TargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Analysis/TargetTransformInfo.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp index 2bbc074186a..9de2f789c89 100644 --- a/llvm/lib/Analysis/TargetTransformInfo.cpp +++ b/llvm/lib/Analysis/TargetTransformInfo.cpp @@ -636,6 +636,12 @@ getOperandInfo(Value *V, TargetTransformInfo::OperandValueProperties &OpProps) { TargetTransformInfo::OK_AnyValue; OpProps = TargetTransformInfo::OP_None; + if (auto *CI = dyn_cast<ConstantInt>(V)) { + if (CI->getValue().isPowerOf2()) + OpProps = TargetTransformInfo::OP_PowerOf2; + return TargetTransformInfo::OK_UniformConstantValue; + } + const Value *Splat = getSplatValue(V); // Check for a splat of a constant or for a non uniform vector of constants |
