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Adjust loop size estimate for full unrolling;

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GEP's don't usually become instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69631 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-04-20 22:19:33 +00:00
parent b306e38a2e
commit 23300aa3e3
1 changed files with 2 additions and 0 deletions
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2
lib/Transforms/Scalar/LoopUnroll.cpp
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@ -89,6 +89,8 @@ static unsigned ApproximateLoopSize(const Loop *L) {
// Ignore instructions only used by the loop terminator.
} else if (isa<DbgInfoIntrinsic>(I)) {
// Ignore debug instructions
} else if (isa<GetElementPtrInst>(I) && I->hasOneUse()) {
// Ignore GEP as they generally are subsumed into a load or store.
} else if (isa<CallInst>(I)) {
// Estimate size overhead introduced by call instructions which
// is higher than other instructions. Here 3 and 10 are magic