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Added DEBUG messages to the top of several processing loops in ObjCARC.cpp that emit what instructions are being visited.

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This is a part of a larger effort of adding DEBUG messages to the ARC
Optimizer Backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171345 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-01-01 16:05:48 +00:00
parent 3dd0781b8c
commit 8f22c8b5e1
1 changed files with 32 additions and 3 deletions
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35
lib/Transforms/Scalar/ObjCARC.cpp
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@ -30,6 +30,7 @@
#define DEBUG_TYPE "objc-arc"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
@ -885,7 +886,9 @@ bool ObjCARCExpand::runOnFunction(Function &F) {
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
Instruction *Inst = &*I;
DEBUG(dbgs() << "ObjCARCExpand: Visiting: " << *Inst << "\n");
switch (GetBasicInstructionClass(Inst)) {
case IC_Retain:
case IC_RetainRV:
@ -904,7 +907,9 @@ bool ObjCARCExpand::runOnFunction(Function &F) {
break;
}
}
DEBUG(dbgs() << "ObjCARCExpand: Finished Queue.\n\n");
return Changed;
}
@ -2273,6 +2278,10 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
// Visit all objc_* calls in F.
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
Instruction *Inst = &*I++;
DEBUG(dbgs() << "ObjCARCOpt: OptimizeIndividualCalls: Visiting: " <<
*Inst << "\n");
InstructionClass Class = GetBasicInstructionClass(Inst);
switch (Class) {
@ -2486,6 +2495,9 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
}
}
} while (!Worklist.empty());
DEBUG(dbgs() << "ObjCARCOpt: Finished Individual Call Queue.\n\n");
}
}
@ -3389,6 +3401,10 @@ void ObjCARCOpt::OptimizeWeakCalls(Function &F) {
// queries instead.
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
Instruction *Inst = &*I++;
DEBUG(dbgs() << "ObjCARCOpt: OptimizeWeakCalls: Visiting: " << *Inst <<
"\n");
InstructionClass Class = GetBasicInstructionClass(Inst);
if (Class != IC_LoadWeak && Class != IC_LoadWeakRetained)
continue;
@ -3534,6 +3550,9 @@ void ObjCARCOpt::OptimizeWeakCalls(Function &F) {
done:;
}
}
DEBUG(dbgs() << "ObjCARCOpt: Finished visiting weak calls.\n\n");
}
/// OptimizeSequences - Identify program paths which execute sequences of
@ -3582,6 +3601,9 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI) {
BasicBlock *BB = FI;
ReturnInst *Ret = dyn_cast<ReturnInst>(&BB->back());
DEBUG(dbgs() << "ObjCARCOpt: OptimizeReturns: Visiting: " << *Ret << "\n");
if (!Ret) continue;
const Value *Arg = StripPointerCastsAndObjCCalls(Ret->getOperand(0));
@ -3665,6 +3687,9 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
DependingInstructions.clear();
Visited.clear();
}
DEBUG(dbgs() << "ObjCARCOpt: OptimizeReturns: Finished visiting returns.\n\n");
}
bool ObjCARCOpt::doInitialization(Module &M) {
@ -4078,7 +4103,9 @@ bool ObjCARCContract::runOnFunction(Function &F) {
SmallPtrSet<const BasicBlock *, 4> Visited;
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
Instruction *Inst = &*I++;
DEBUG(dbgs() << "ObjCARCContract: Visiting: " << *Inst << "\n");
// Only these library routines return their argument. In particular,
// objc_retainBlock does not necessarily return its argument.
InstructionClass Class = GetBasicInstructionClass(Inst);
@ -4154,6 +4181,8 @@ bool ObjCARCContract::runOnFunction(Function &F) {
continue;
}
DEBUG(dbgs() << "ObjCARCContract: Finished Queue.\n\n");
// Don't use GetObjCArg because we don't want to look through bitcasts
// and such; to do the replacement, the argument must have type i8*.
const Value *Arg = cast<CallInst>(Inst)->getArgOperand(0);