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If a function calls setjmp, never inline it into other functions. This is

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a hack around the fact that we don't represent the CFG correctly for sj/lj.
It fixes PR2486.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53540 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-07-14 00:46:56 +00:00
parent 4238453135
commit ac77bfdbd4
1 changed files with 23 additions and 1 deletions
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24
lib/Transforms/Utils/InlineCost.cpp
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@ -100,9 +100,27 @@ void InlineCostAnalyzer::FunctionInfo::analyzeFunction(Function *F) {
for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
for (BasicBlock::const_iterator II = BB->begin(), E = BB->end();
II != E; ++II) {
if (isa<DbgInfoIntrinsic>(II)) continue; // Debug intrinsics don't count.
if (isa<PHINode>(II)) continue; // PHI nodes don't count.
// Special handling for calls.
if (isa<CallInst>(II) || isa<InvokeInst>(II)) {
if (isa<DbgInfoIntrinsic>(II))
continue; // Debug intrinsics don't count as size.
CallSite CS = CallSite::get(const_cast<Instruction*>(&*II));
// If this function contains a call to setjmp or _setjmp, never inline
// it. This is a hack because we depend on the user marking their local
// variables as volatile if they are live across a setjmp call, and they
// probably won't do this in callers.
if (Function *F = CS.getCalledFunction())
if (F->isDeclaration() &&
(F->isName("setjmp") || F->isName("_setjmp"))) {
NeverInline = true;
return;
}
}
if (isa<ExtractElementInst>(II) || isa<VectorType>(II->getType()))
++NumVectorInsts;
@ -194,6 +212,10 @@ int InlineCostAnalyzer::getInlineCost(CallSite CS,
// If we haven't calculated this information yet, do so now.
if (CalleeFI.NumBlocks == 0)
CalleeFI.analyzeFunction(Callee);
// If we should never inline this, return a huge cost.
if (CalleeFI.NeverInline)
return 2000000000;
// Add to the inline quality for properties that make the call valuable to
// inline. This includes factors that indicate that the result of inlining