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Diffstat (limited to 'llvm/lib/Analysis/IPA/InlineCost.cpp')
| -rw-r--r-- | llvm/lib/Analysis/IPA/InlineCost.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/IPA/InlineCost.cpp b/llvm/lib/Analysis/IPA/InlineCost.cpp index 166488bf67e..c180f36b923 100644 --- a/llvm/lib/Analysis/IPA/InlineCost.cpp +++ b/llvm/lib/Analysis/IPA/InlineCost.cpp @@ -907,6 +907,25 @@ bool CallAnalyzer::analyzeBlock(BasicBlock *BB, if (isa<ExtractElementInst>(I) || I->getType()->isVectorTy()) ++NumVectorInstructions; + // If the instruction is floating point, and the target says this operation is + // expensive or the function has the "use-soft-float" attribute, this may + // eventually become a library call. Treat the cost as such. + if (I->getType()->isFloatingPointTy()) { + bool hasSoftFloatAttr = false; + + // If the function has the "use-soft-float" attribute, mark it as expensive. + if (F.hasFnAttribute("use-soft-float")) { + Attribute Attr = F.getFnAttribute("use-soft-float"); + StringRef Val = Attr.getValueAsString(); + if (Val == "true") + hasSoftFloatAttr = true; + } + + if (TTI.getFPOpCost(I->getType()) == TargetTransformInfo::TCC_Expensive || + hasSoftFloatAttr) + Cost += InlineConstants::CallPenalty; + } + // If the instruction simplified to a constant, there is no cost to this // instruction. Visit the instructions using our InstVisitor to account for // all of the per-instruction logic. The visit tree returns true if we |
