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Add some stats to CodeGenPrepare to make it easier to speed it up without

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regressing code quality.

llvm-svn: 122887
This commit is contained in:
Cameron Zwarich 2011-01-05 17:27:27 +00:00
parent 832c9e07a1
commit eca6d2c70a
1 changed files with 15 additions and 3 deletions
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18
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -44,7 +44,15 @@
using namespace llvm;
using namespace llvm::PatternMatch;
STATISTIC(NumElim, "Number of blocks eliminated");
STATISTIC(NumBlocksElim, "Number of blocks eliminated");
STATISTIC(NumCmpUses, "Number of uses of Cmp expressions replaced with uses of "
"sunken Cmps");
STATISTIC(NumCastUses, "Number of uses of Cast expressions replaced with uses "
"of sunken Casts");
STATISTIC(NumMemoryInsts, "Number of memory instructions whose address "
"computations were sunk");
STATISTIC(NumExtsMoved, "Number of [s|z]ext instructions combined with loads");
STATISTIC(NumExtUses, "Number of uses of [s|z]ext instructions optimized");
static cl::opt<bool>
CriticalEdgeSplit("cgp-critical-edge-splitting",
@ -310,7 +318,7 @@ void CodeGenPrepare::EliminateMostlyEmptyBlock(BasicBlock *BB) {
PFI->removeEdge(ProfileInfo::getEdge(BB, DestBB));
}
BB->eraseFromParent();
++NumElim;
++NumBlocksElim;
DEBUG(dbgs() << "AFTER:\n" << *DestBB << "\n\n\n");
}
@ -489,6 +497,7 @@ static bool OptimizeNoopCopyExpression(CastInst *CI, const TargetLowering &TLI){
// Replace a use of the cast with a use of the new cast.
TheUse = InsertedCast;
++NumCastUses;
}
// If we removed all uses, nuke the cast.
@ -546,6 +555,7 @@ static bool OptimizeCmpExpression(CmpInst *CI) {
// Replace a use of the cmp with a use of the new cmp.
TheUse = InsertedCmp;
++NumCmpUses;
}
// If we removed all uses, nuke the cmp.
@ -793,6 +803,7 @@ bool CodeGenPrepare::OptimizeMemoryInst(Instruction *MemoryInst, Value *Addr,
// we don't want to match some completely different instruction.
SunkAddrs[Addr] = 0;
}
++NumMemoryInsts;
return true;
}
@ -858,6 +869,7 @@ bool CodeGenPrepare::MoveExtToFormExtLoad(Instruction *I) {
// can fold it.
I->removeFromParent();
I->insertAfter(LI);
++NumExtsMoved;
return true;
}
@ -929,7 +941,7 @@ bool CodeGenPrepare::OptimizeExtUses(Instruction *I) {
// Replace a use of the {s|z}ext source with a use of the result.
TheUse = InsertedTrunc;
++NumExtUses;
MadeChange = true;
}