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Avoid counting InlineAsm as a call - it prevents loop unrolling.

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PR7026
Patch by Pekka Jääskeläinen!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104780 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-05-26 22:40:28 +00:00
parent a0f7ff334f
commit 8b3ca84a8d
1 changed files with 5 additions and 1 deletions
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6
lib/Analysis/InlineCost.cpp
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@ -175,7 +175,11 @@ void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB) {
if (!isa<IntrinsicInst>(II) && !callIsSmall(CS.getCalledFunction())) {
// Each argument to a call takes on average one instruction to set up.
NumInsts += CS.arg_size();
++NumCalls;
// We don't want inline asm to count as a call - that would prevent loop
// unrolling. The argument setup cost is still real, though.
if (!isa<InlineAsm>(CS.getCalledValue()))
++NumCalls;
}
}