#include "llvm/BasicBlock.h"
#include "Support/PostOrderIterator.h"
#include <iostream>
-using std::cerr;
AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
//-----------------------------------------------------------------------------
bool MethodLiveVarInfo::runOnMethod(Method *M) {
- if (DEBUG_LV) cerr << "Analysing live variables ...\n";
+ if (DEBUG_LV) std::cerr << "Analysing live variables ...\n";
// create and initialize all the BBLiveVars of the CFG
constructBBs(M);
while (doSingleBackwardPass(M))
; // Iterate until we are done.
- if (DEBUG_LV) cerr << "Live Variable Analysis complete!\n";
+ if (DEBUG_LV) std::cerr << "Live Variable Analysis complete!\n";
return false;
}
BBI != BBE; ++BBI, ++POId) {
const BasicBlock *BB = *BBI; // get the current BB
- if (DEBUG_LV) { cerr << " For BB "; printValue(BB); cerr << ":\n"; }
+ if (DEBUG_LV) { std::cerr << " For BB "; printValue(BB); cerr << ":\n"; }
// create a new BBLiveVar
BBLiveVar *LVBB = new BBLiveVar(BB, POId);
LVBB->calcDefUseSets(); // calculates the def and in set
- if (DEBUG_LV)
+ if (DEBUG_LV)
LVBB->printAllSets();
}
//
for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
BBRI != BBRE; ++BBRI, ++POId)
- if (!BB2BBLVMap[*BBRI]) // Not yet processed?
+ if (!BB2BBLVMap[*BBRI]) // Not yet processed?
BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
}
//-----------------------------------------------------------------------------
// do one backward pass over the CFG (for iterative analysis)
//-----------------------------------------------------------------------------
-bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
- bool ResultFlow, NeedAnotherIteration = false;
-
- if (DEBUG_LV)
- cerr << "\n After Backward Pass ...\n";
- po_iterator<const Method*> BBI = po_begin(M);
+bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
+ if (DEBUG_LV) std::cerr << "\n After Backward Pass ...\n";
- for( ; BBI != po_end(M) ; ++BBI) {
+ bool NeedAnotherIteration = false;
+ for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
BBLiveVar *LVBB = BB2BBLVMap[*BBI];
- assert(LVBB);
+ assert(LVBB && "BasicBlock information not set for block!");
- if (DEBUG_LV) cerr << " For BB " << (*BBI)->getName() << ":\n";
+ if (DEBUG_LV) std::cerr << " For BB " << (*BBI)->getName() << ":\n";
if(LVBB->isOutSetChanged())
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
if (LVBB->isInSetChanged()) // to calc Outsets of preds
NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
- if(DEBUG_LV) LVBB->printInOutSets();
+ if (DEBUG_LV) LVBB->printInOutSets();
}
// true if we need to reiterate over the CFG
void MethodLiveVarInfo::releaseMemory() {
// First delete all BBLiveVar objects created in constructBBs(). A new object
- // of type BBLiveVa is created for every BasicBlock in the method
-
- // hash map iterator for BB2BBLVMap
+ // of type BBLiveVar is created for every BasicBlock in the method
//
- BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin();
-
- for( ; HMI != BB2BBLVMap.end(); ++HMI)
+ for (BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(),
+ HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
BB2BBLVMap.clear();
// to return LiveVarSet's before/after a machine instruction quickly). It
// is sufficient to free up all LiveVarSet using only one cache since
// both caches refer to the same sets
-
- // hash map iterator for MInst2LVSetBI
//
- MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin();
-
- for( ; MI != MInst2LVSetBI.end(); ++MI)
+ for (MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(),
+ ME = MInst2LVSetBI.end(); MI != ME; ++MI)
delete MI->second; // delete all LiveVarSets in MInst2LVSetBI
MInst2LVSetBI.clear();
//-----------------------------------------------------------------------------
-/* Following functions will give the LiveVar info for any machine instr in
- a method. It should be called after a call to analyze().
-
- Thsese functions calucluates live var info for all the machine instrs in a
- BB when LVInfo for one inst is requested. Hence, this function is useful
- when live var info is required for many (or all) instructions in a basic
- block. Also, the arguments to this method does not require specific
- iterators.
-*/
+// Following functions will give the LiveVar info for any machine instr in
+// a method. It should be called after a call to analyze().
+//
+// Thsese functions calucluates live var info for all the machine instrs in a
+// BB when LVInfo for one inst is requested. Hence, this function is useful
+// when live var info is required for many (or all) instructions in a basic
+// block. Also, the arguments to this method does not require specific
+// iterators.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Gives live variable information before a machine instruction
//-----------------------------------------------------------------------------
+
const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
- const BasicBlock *CurBB) {
- const LiveVarSet *LVSet = MInst2LVSetBI[MInst];
-
- if (LVSet) {
- return LVSet; // if found, just return the set
+ const BasicBlock *BB) {
+ if (const LiveVarSet *LVSet = MInst2LVSetBI[MInst]) {
+ return LVSet; // if found, just return the set
} else {
- calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
- assert(MInst2LVSetBI[MInst]);
+ calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
return MInst2LVSetBI[MInst];
}
}
// Gives live variable information after a machine instruction
//-----------------------------------------------------------------------------
const LiveVarSet *
-MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
- const BasicBlock *CurBB) {
- const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
+MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MI,
+ const BasicBlock *BB) {
- if(LVSet) {
+ if (const LiveVarSet *LVSet = MInst2LVSetAI[MI]) {
return LVSet; // if found, just return the set
} else {
- calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
- assert(MInst2LVSetAI[MInst]);
- return MInst2LVSetAI[MInst];
+ calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
+ return MInst2LVSetAI[MI];
}
}
//-----------------------------------------------------------------------------
// This method calculates the live variable information for all the
// instructions in a basic block and enter the newly constructed live
-// variable sets into a the caches ( MInst2LVSetAI, MInst2LVSetBI)
+// variable sets into a the caches (MInst2LVSetAI, MInst2LVSetBI)
//-----------------------------------------------------------------------------
-void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *const BB)
-{
- const MachineCodeForBasicBlock& MIVec = BB->getMachineInstrVec();
- MachineCodeForBasicBlock::const_reverse_iterator
- MInstIterator = MIVec.rbegin();
+
+void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *BB) {
+ const MachineCodeForBasicBlock &MIVec = BB->getMachineInstrVec();
LiveVarSet *CurSet = new LiveVarSet();
const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet
CurSet->setUnion(SetAI); // CurSet now contains OutSet
// iterate over all the machine instructions in BB
- for( ; MInstIterator != MIVec.rend(); MInstIterator++) {
+ for (MachineCodeForBasicBlock::const_reverse_iterator MII = MIVec.rbegin(),
+ MIE = MIVec.rend(); MII != MIE; ++MII) {
+ // MI is cur machine inst
+ const MachineInstr *MI = *MII;
- // MInst is cur machine inst
- const MachineInstr * MInst = *MInstIterator;
+ MInst2LVSetAI[MI] = SetAI; // record in After Inst map
- MInst2LVSetAI[MInst] = SetAI; // record in After Inst map
-
- CurSet->applyTranferFuncForMInst( MInst ); // apply the transfer Func
+ CurSet->applyTranferFuncForMInst(MI); // apply the transfer Func
LiveVarSet *NewSet = new LiveVarSet(); // create a new set and
- NewSet->setUnion( CurSet ); // copy the set after T/F to it
+ NewSet->setUnion(CurSet); // copy the set after T/F to it
- MInst2LVSetBI[MInst] = NewSet; // record in Before Inst map
+ MInst2LVSetBI[MI] = NewSet; // record in Before Inst map
// SetAI will be used in the next iteration
SetAI = NewSet;
}
-
}
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#include "llvm/BasicBlock.h"
#include "Support/PostOrderIterator.h"
#include <iostream>
-using std::cerr;
AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
//-----------------------------------------------------------------------------
bool MethodLiveVarInfo::runOnMethod(Method *M) {
- if (DEBUG_LV) cerr << "Analysing live variables ...\n";
+ if (DEBUG_LV) std::cerr << "Analysing live variables ...\n";
// create and initialize all the BBLiveVars of the CFG
constructBBs(M);
while (doSingleBackwardPass(M))
; // Iterate until we are done.
- if (DEBUG_LV) cerr << "Live Variable Analysis complete!\n";
+ if (DEBUG_LV) std::cerr << "Live Variable Analysis complete!\n";
return false;
}
BBI != BBE; ++BBI, ++POId) {
const BasicBlock *BB = *BBI; // get the current BB
- if (DEBUG_LV) { cerr << " For BB "; printValue(BB); cerr << ":\n"; }
+ if (DEBUG_LV) { std::cerr << " For BB "; printValue(BB); cerr << ":\n"; }
// create a new BBLiveVar
BBLiveVar *LVBB = new BBLiveVar(BB, POId);
LVBB->calcDefUseSets(); // calculates the def and in set
- if (DEBUG_LV)
+ if (DEBUG_LV)
LVBB->printAllSets();
}
//
for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
BBRI != BBRE; ++BBRI, ++POId)
- if (!BB2BBLVMap[*BBRI]) // Not yet processed?
+ if (!BB2BBLVMap[*BBRI]) // Not yet processed?
BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
}
//-----------------------------------------------------------------------------
// do one backward pass over the CFG (for iterative analysis)
//-----------------------------------------------------------------------------
-bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
- bool ResultFlow, NeedAnotherIteration = false;
-
- if (DEBUG_LV)
- cerr << "\n After Backward Pass ...\n";
- po_iterator<const Method*> BBI = po_begin(M);
+bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
+ if (DEBUG_LV) std::cerr << "\n After Backward Pass ...\n";
- for( ; BBI != po_end(M) ; ++BBI) {
+ bool NeedAnotherIteration = false;
+ for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
BBLiveVar *LVBB = BB2BBLVMap[*BBI];
- assert(LVBB);
+ assert(LVBB && "BasicBlock information not set for block!");
- if (DEBUG_LV) cerr << " For BB " << (*BBI)->getName() << ":\n";
+ if (DEBUG_LV) std::cerr << " For BB " << (*BBI)->getName() << ":\n";
if(LVBB->isOutSetChanged())
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
if (LVBB->isInSetChanged()) // to calc Outsets of preds
NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
- if(DEBUG_LV) LVBB->printInOutSets();
+ if (DEBUG_LV) LVBB->printInOutSets();
}
// true if we need to reiterate over the CFG
void MethodLiveVarInfo::releaseMemory() {
// First delete all BBLiveVar objects created in constructBBs(). A new object
- // of type BBLiveVa is created for every BasicBlock in the method
-
- // hash map iterator for BB2BBLVMap
+ // of type BBLiveVar is created for every BasicBlock in the method
//
- BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin();
-
- for( ; HMI != BB2BBLVMap.end(); ++HMI)
+ for (BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(),
+ HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
BB2BBLVMap.clear();
// to return LiveVarSet's before/after a machine instruction quickly). It
// is sufficient to free up all LiveVarSet using only one cache since
// both caches refer to the same sets
-
- // hash map iterator for MInst2LVSetBI
//
- MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin();
-
- for( ; MI != MInst2LVSetBI.end(); ++MI)
+ for (MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(),
+ ME = MInst2LVSetBI.end(); MI != ME; ++MI)
delete MI->second; // delete all LiveVarSets in MInst2LVSetBI
MInst2LVSetBI.clear();
//-----------------------------------------------------------------------------
-/* Following functions will give the LiveVar info for any machine instr in
- a method. It should be called after a call to analyze().
-
- Thsese functions calucluates live var info for all the machine instrs in a
- BB when LVInfo for one inst is requested. Hence, this function is useful
- when live var info is required for many (or all) instructions in a basic
- block. Also, the arguments to this method does not require specific
- iterators.
-*/
+// Following functions will give the LiveVar info for any machine instr in
+// a method. It should be called after a call to analyze().
+//
+// Thsese functions calucluates live var info for all the machine instrs in a
+// BB when LVInfo for one inst is requested. Hence, this function is useful
+// when live var info is required for many (or all) instructions in a basic
+// block. Also, the arguments to this method does not require specific
+// iterators.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Gives live variable information before a machine instruction
//-----------------------------------------------------------------------------
+
const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
- const BasicBlock *CurBB) {
- const LiveVarSet *LVSet = MInst2LVSetBI[MInst];
-
- if (LVSet) {
- return LVSet; // if found, just return the set
+ const BasicBlock *BB) {
+ if (const LiveVarSet *LVSet = MInst2LVSetBI[MInst]) {
+ return LVSet; // if found, just return the set
} else {
- calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
- assert(MInst2LVSetBI[MInst]);
+ calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
return MInst2LVSetBI[MInst];
}
}
// Gives live variable information after a machine instruction
//-----------------------------------------------------------------------------
const LiveVarSet *
-MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
- const BasicBlock *CurBB) {
- const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
+MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MI,
+ const BasicBlock *BB) {
- if(LVSet) {
+ if (const LiveVarSet *LVSet = MInst2LVSetAI[MI]) {
return LVSet; // if found, just return the set
} else {
- calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
- assert(MInst2LVSetAI[MInst]);
- return MInst2LVSetAI[MInst];
+ calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
+ return MInst2LVSetAI[MI];
}
}
//-----------------------------------------------------------------------------
// This method calculates the live variable information for all the
// instructions in a basic block and enter the newly constructed live
-// variable sets into a the caches ( MInst2LVSetAI, MInst2LVSetBI)
+// variable sets into a the caches (MInst2LVSetAI, MInst2LVSetBI)
//-----------------------------------------------------------------------------
-void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *const BB)
-{
- const MachineCodeForBasicBlock& MIVec = BB->getMachineInstrVec();
- MachineCodeForBasicBlock::const_reverse_iterator
- MInstIterator = MIVec.rbegin();
+
+void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *BB) {
+ const MachineCodeForBasicBlock &MIVec = BB->getMachineInstrVec();
LiveVarSet *CurSet = new LiveVarSet();
const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet
CurSet->setUnion(SetAI); // CurSet now contains OutSet
// iterate over all the machine instructions in BB
- for( ; MInstIterator != MIVec.rend(); MInstIterator++) {
+ for (MachineCodeForBasicBlock::const_reverse_iterator MII = MIVec.rbegin(),
+ MIE = MIVec.rend(); MII != MIE; ++MII) {
+ // MI is cur machine inst
+ const MachineInstr *MI = *MII;
- // MInst is cur machine inst
- const MachineInstr * MInst = *MInstIterator;
+ MInst2LVSetAI[MI] = SetAI; // record in After Inst map
- MInst2LVSetAI[MInst] = SetAI; // record in After Inst map
-
- CurSet->applyTranferFuncForMInst( MInst ); // apply the transfer Func
+ CurSet->applyTranferFuncForMInst(MI); // apply the transfer Func
LiveVarSet *NewSet = new LiveVarSet(); // create a new set and
- NewSet->setUnion( CurSet ); // copy the set after T/F to it
+ NewSet->setUnion(CurSet); // copy the set after T/F to it
- MInst2LVSetBI[MInst] = NewSet; // record in Before Inst map
+ MInst2LVSetBI[MI] = NewSet; // record in Before Inst map
// SetAI will be used in the next iteration
SetAI = NewSet;
}
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projects / oota-llvm.git / commitdiff