diff options
Diffstat (limited to 'lib/Analysis/IPA/InlineCost.cpp')
-rw-r--r-- | lib/Analysis/IPA/InlineCost.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/Analysis/IPA/InlineCost.cpp b/lib/Analysis/IPA/InlineCost.cpp index a803f8c3bf..683637f5b7 100644 --- a/lib/Analysis/IPA/InlineCost.cpp +++ b/lib/Analysis/IPA/InlineCost.cpp @@ -1300,8 +1300,14 @@ bool InlineCostAnalysis::isInlineViable(Function &F) { F.getAttributes().hasAttribute(AttributeSet::FunctionIndex, Attribute::ReturnsTwice); for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI) { - // Disallow inlining of functions which contain an indirect branch. - if (isa<IndirectBrInst>(BI->getTerminator())) + // Disallow inlining of functions which contain an indirect branch, + // unless the always_inline attribute is set. + // The attribute serves as a assertion that no local address + // like a block label can escpape the function. + // Revisit enabling inlining for functions with indirect branches + // when a more sophisticated espape/points-to analysis becomes available. + if (isa<IndirectBrInst>(BI->getTerminator()) && + !F.hasFnAttribute(Attribute::AlwaysInline)) return false; for (BasicBlock::iterator II = BI->begin(), IE = BI->end(); II != IE; |