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Change errs() to dbgs().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92614 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Greene 2010-01-05 01:27:19 +00:00
parent bf7f78e625
commit fe7fe6603f
1 changed files with 25 additions and 25 deletions
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50
lib/Transforms/Scalar/JumpThreading.cpp
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@ -118,7 +118,7 @@ FunctionPass *llvm::createJumpThreadingPass() { return new JumpThreading(); }
/// runOnFunction - Top level algorithm.
///
bool JumpThreading::runOnFunction(Function &F) {
DEBUG(errs() << "Jump threading on function '" << F.getName() << "'\n");
DEBUG(dbgs() << "Jump threading on function '" << F.getName() << "'\n");
TD = getAnalysisIfAvailable<TargetData>();
LVI = EnableLVI ? &getAnalysis<LazyValueInfo>() : 0;
@ -140,7 +140,7 @@ bool JumpThreading::runOnFunction(Function &F) {
// edges which simplifies the CFG.
if (pred_begin(BB) == pred_end(BB) &&
BB != &BB->getParent()->getEntryBlock()) {
DEBUG(errs() << " JT: Deleting dead block '" << BB->getName()
DEBUG(dbgs() << " JT: Deleting dead block '" << BB->getName()
<< "' with terminator: " << *BB->getTerminator() << '\n');
LoopHeaders.erase(BB);
DeleteDeadBlock(BB);
@ -490,7 +490,7 @@ bool JumpThreading::ProcessBlock(BasicBlock *BB) {
// terminator to an unconditional branch. This can occur due to threading in
// other blocks.
if (isa<ConstantInt>(Condition)) {
DEBUG(errs() << " In block '" << BB->getName()
DEBUG(dbgs() << " In block '" << BB->getName()
<< "' folding terminator: " << *BB->getTerminator() << '\n');
++NumFolds;
ConstantFoldTerminator(BB);
@ -509,7 +509,7 @@ bool JumpThreading::ProcessBlock(BasicBlock *BB) {
RemovePredecessorAndSimplify(BBTerm->getSuccessor(i), BB, TD);
}
DEBUG(errs() << " In block '" << BB->getName()
DEBUG(dbgs() << " In block '" << BB->getName()
<< "' folding undef terminator: " << *BBTerm << '\n');
BranchInst::Create(BBTerm->getSuccessor(BestSucc), BBTerm);
BBTerm->eraseFromParent();
@ -636,7 +636,7 @@ bool JumpThreading::ProcessBranchOnDuplicateCond(BasicBlock *PredBB,
else if (PredBI->getSuccessor(0) != BB)
BranchDir = false;
else {
DEBUG(errs() << " In block '" << PredBB->getName()
DEBUG(dbgs() << " In block '" << PredBB->getName()
<< "' folding terminator: " << *PredBB->getTerminator() << '\n');
++NumFolds;
ConstantFoldTerminator(PredBB);
@ -648,7 +648,7 @@ bool JumpThreading::ProcessBranchOnDuplicateCond(BasicBlock *PredBB,
// If the dest block has one predecessor, just fix the branch condition to a
// constant and fold it.
if (BB->getSinglePredecessor()) {
DEBUG(errs() << " In block '" << BB->getName()
DEBUG(dbgs() << " In block '" << BB->getName()
<< "' folding condition to '" << BranchDir << "': "
<< *BB->getTerminator() << '\n');
++NumFolds;
@ -727,8 +727,8 @@ bool JumpThreading::ProcessSwitchOnDuplicateCond(BasicBlock *PredBB,
// Otherwise, we're safe to make the change. Make sure that the edge from
// DestSI to DestSucc is not critical and has no PHI nodes.
DEBUG(errs() << "FORWARDING EDGE " << *DestVal << " FROM: " << *PredSI);
DEBUG(errs() << "THROUGH: " << *DestSI);
DEBUG(dbgs() << "FORWARDING EDGE " << *DestVal << " FROM: " << *PredSI);
DEBUG(dbgs() << "THROUGH: " << *DestSI);
// If the destination has PHI nodes, just split the edge for updating
// simplicity.
@ -979,14 +979,14 @@ bool JumpThreading::ProcessThreadableEdges(Value *Cond, BasicBlock *BB) {
assert(!PredValues.empty() &&
"ComputeValueKnownInPredecessors returned true with no values");
DEBUG(errs() << "IN BB: " << *BB;
DEBUG(dbgs() << "IN BB: " << *BB;
for (unsigned i = 0, e = PredValues.size(); i != e; ++i) {
errs() << " BB '" << BB->getName() << "': FOUND condition = ";
dbgs() << " BB '" << BB->getName() << "': FOUND condition = ";
if (PredValues[i].first)
errs() << *PredValues[i].first;
dbgs() << *PredValues[i].first;
else
errs() << "UNDEF";
errs() << " for pred '" << PredValues[i].second->getName()
dbgs() << "UNDEF";
dbgs() << " for pred '" << PredValues[i].second->getName()
<< "'.\n";
});
@ -1133,7 +1133,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
BasicBlock *SuccBB) {
// If threading to the same block as we come from, we would infinite loop.
if (SuccBB == BB) {
DEBUG(errs() << " Not threading across BB '" << BB->getName()
DEBUG(dbgs() << " Not threading across BB '" << BB->getName()
<< "' - would thread to self!\n");
return false;
}
@ -1141,7 +1141,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
// If threading this would thread across a loop header, don't thread the edge.
// See the comments above FindLoopHeaders for justifications and caveats.
if (LoopHeaders.count(BB)) {
DEBUG(errs() << " Not threading across loop header BB '" << BB->getName()
DEBUG(dbgs() << " Not threading across loop header BB '" << BB->getName()
<< "' to dest BB '" << SuccBB->getName()
<< "' - it might create an irreducible loop!\n");
return false;
@ -1149,7 +1149,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
unsigned JumpThreadCost = getJumpThreadDuplicationCost(BB);
if (JumpThreadCost > Threshold) {
DEBUG(errs() << " Not threading BB '" << BB->getName()
DEBUG(dbgs() << " Not threading BB '" << BB->getName()
<< "' - Cost is too high: " << JumpThreadCost << "\n");
return false;
}
@ -1159,14 +1159,14 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
if (PredBBs.size() == 1)
PredBB = PredBBs[0];
else {
DEBUG(errs() << " Factoring out " << PredBBs.size()
DEBUG(dbgs() << " Factoring out " << PredBBs.size()
<< " common predecessors.\n");
PredBB = SplitBlockPredecessors(BB, &PredBBs[0], PredBBs.size(),
".thr_comm", this);
}
// And finally, do it!
DEBUG(errs() << " Threading edge from '" << PredBB->getName() << "' to '"
DEBUG(dbgs() << " Threading edge from '" << PredBB->getName() << "' to '"
<< SuccBB->getName() << "' with cost: " << JumpThreadCost
<< ", across block:\n "
<< *BB << "\n");
@ -1235,7 +1235,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
if (UsesToRename.empty())
continue;
DEBUG(errs() << "JT: Renaming non-local uses of: " << *I << "\n");
DEBUG(dbgs() << "JT: Renaming non-local uses of: " << *I << "\n");
// We found a use of I outside of BB. Rename all uses of I that are outside
// its block to be uses of the appropriate PHI node etc. See ValuesInBlocks
@ -1246,7 +1246,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
while (!UsesToRename.empty())
SSAUpdate.RewriteUse(*UsesToRename.pop_back_val());
DEBUG(errs() << "\n");
DEBUG(dbgs() << "\n");
}
@ -1294,7 +1294,7 @@ bool JumpThreading::DuplicateCondBranchOnPHIIntoPred(BasicBlock *BB,
// cause us to transform this into an irreducible loop, don't do this.
// See the comments above FindLoopHeaders for justifications and caveats.
if (LoopHeaders.count(BB)) {
DEBUG(errs() << " Not duplicating loop header '" << BB->getName()
DEBUG(dbgs() << " Not duplicating loop header '" << BB->getName()
<< "' into predecessor block '" << PredBB->getName()
<< "' - it might create an irreducible loop!\n");
return false;
@ -1302,14 +1302,14 @@ bool JumpThreading::DuplicateCondBranchOnPHIIntoPred(BasicBlock *BB,
unsigned DuplicationCost = getJumpThreadDuplicationCost(BB);
if (DuplicationCost > Threshold) {
DEBUG(errs() << " Not duplicating BB '" << BB->getName()
DEBUG(dbgs() << " Not duplicating BB '" << BB->getName()
<< "' - Cost is too high: " << DuplicationCost << "\n");
return false;
}
// Okay, we decided to do this! Clone all the instructions in BB onto the end
// of PredBB.
DEBUG(errs() << " Duplicating block '" << BB->getName() << "' into end of '"
DEBUG(dbgs() << " Duplicating block '" << BB->getName() << "' into end of '"
<< PredBB->getName() << "' to eliminate branch on phi. Cost: "
<< DuplicationCost << " block is:" << *BB << "\n");
@ -1373,7 +1373,7 @@ bool JumpThreading::DuplicateCondBranchOnPHIIntoPred(BasicBlock *BB,
if (UsesToRename.empty())
continue;
DEBUG(errs() << "JT: Renaming non-local uses of: " << *I << "\n");
DEBUG(dbgs() << "JT: Renaming non-local uses of: " << *I << "\n");
// We found a use of I outside of BB. Rename all uses of I that are outside
// its block to be uses of the appropriate PHI node etc. See ValuesInBlocks
@ -1384,7 +1384,7 @@ bool JumpThreading::DuplicateCondBranchOnPHIIntoPred(BasicBlock *BB,
while (!UsesToRename.empty())
SSAUpdate.RewriteUse(*UsesToRename.pop_back_val());
DEBUG(errs() << "\n");
DEBUG(dbgs() << "\n");
}
// PredBB no longer jumps to BB, remove entries in the PHI node for the edge