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Code cleanups, no functional change

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1704 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-02-04 23:31:16 +00:00
parent bdfd328515
commit a51c7a8ef5
2 changed files with 94 additions and 164 deletions
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123
lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
View File

@ -14,7 +14,6 @@
#include "llvm/BasicBlock.h" #include "llvm/BasicBlock.h"
#include "Support/PostOrderIterator.h" #include "Support/PostOrderIterator.h"
#include <iostream> #include <iostream>
using std::cerr;
AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>()); AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
@ -24,7 +23,7 @@ AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
bool MethodLiveVarInfo::runOnMethod(Method *M) { 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 // create and initialize all the BBLiveVars of the CFG
constructBBs(M); constructBBs(M);
@ -32,7 +31,7 @@ bool MethodLiveVarInfo::runOnMethod(Method *M) {
while (doSingleBackwardPass(M)) while (doSingleBackwardPass(M))
; // Iterate until we are done. ; // 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; return false;
} }
@ -48,7 +47,7 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
BBI != BBE; ++BBI, ++POId) { BBI != BBE; ++BBI, ++POId) {
const BasicBlock *BB = *BBI; // get the current BB 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 // create a new BBLiveVar
BBLiveVar *LVBB = new BBLiveVar(BB, POId); BBLiveVar *LVBB = new BBLiveVar(BB, POId);
@ -75,19 +74,16 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// do one backward pass over the CFG (for iterative analysis) // do one backward pass over the CFG (for iterative analysis)
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) { bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
bool ResultFlow, NeedAnotherIteration = false; if (DEBUG_LV) std::cerr << "\n After Backward Pass ...\n";
if (DEBUG_LV) bool NeedAnotherIteration = false;
cerr << "\n After Backward Pass ...\n"; for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
po_iterator<const Method*> BBI = po_begin(M);
for( ; BBI != po_end(M) ; ++BBI) {
BBLiveVar *LVBB = BB2BBLVMap[*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()) if(LVBB->isOutSetChanged())
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
@ -95,7 +91,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
if (LVBB->isInSetChanged()) // to calc Outsets of preds if (LVBB->isInSetChanged()) // to calc Outsets of preds
NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap); NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
if(DEBUG_LV) LVBB->printInOutSets(); if (DEBUG_LV) LVBB->printInOutSets();
} }
// true if we need to reiterate over the CFG // true if we need to reiterate over the CFG
@ -105,13 +101,10 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
void MethodLiveVarInfo::releaseMemory() { void MethodLiveVarInfo::releaseMemory() {
// First delete all BBLiveVar objects created in constructBBs(). A new object // First delete all BBLiveVar objects created in constructBBs(). A new object
// of type BBLiveVa is created for every BasicBlock in the method // of type BBLiveVar is created for every BasicBlock in the method
// hash map iterator for BB2BBLVMap
// //
BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(); for (BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(),
HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
for( ; HMI != BB2BBLVMap.end(); ++HMI)
delete HMI->second; // delete all BBLiveVar in BB2BBLVMap delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
BB2BBLVMap.clear(); BB2BBLVMap.clear();
@ -121,12 +114,9 @@ void MethodLiveVarInfo::releaseMemory() {
// to return LiveVarSet's before/after a machine instruction quickly). It // to return LiveVarSet's before/after a machine instruction quickly). It
// is sufficient to free up all LiveVarSet using only one cache since // is sufficient to free up all LiveVarSet using only one cache since
// both caches refer to the same sets // both caches refer to the same sets
// hash map iterator for MInst2LVSetBI
// //
MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(); for (MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(),
ME = MInst2LVSetBI.end(); MI != ME; ++MI)
for( ; MI != MInst2LVSetBI.end(); ++MI)
delete MI->second; // delete all LiveVarSets in MInst2LVSetBI delete MI->second; // delete all LiveVarSets in MInst2LVSetBI
MInst2LVSetBI.clear(); MInst2LVSetBI.clear();
@ -137,30 +127,27 @@ void MethodLiveVarInfo::releaseMemory() {
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
/* Following functions will give the LiveVar info for any machine instr in // Following functions will give the LiveVar info for any machine instr in
a method. It should be called after a call to analyze(). // a method. It should be called after a call to analyze().
//
Thsese functions calucluates live var info for all the machine instrs in a // 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 // 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 // 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 // block. Also, the arguments to this method does not require specific
iterators. // iterators.
*/
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// Gives live variable information before a machine instruction // Gives live variable information before a machine instruction
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
const LiveVarSet * const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst, MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
const BasicBlock *CurBB) { const BasicBlock *BB) {
const LiveVarSet *LVSet = MInst2LVSetBI[MInst]; if (const LiveVarSet *LVSet = MInst2LVSetBI[MInst]) {
if (LVSet) {
return LVSet; // if found, just return the set return LVSet; // if found, just return the set
} else { } else {
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
assert(MInst2LVSetBI[MInst]);
return MInst2LVSetBI[MInst]; return MInst2LVSetBI[MInst];
} }
} }
@ -170,16 +157,14 @@ MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
// Gives live variable information after a machine instruction // Gives live variable information after a machine instruction
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
const LiveVarSet * const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst, MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MI,
const BasicBlock *CurBB) { const BasicBlock *BB) {
const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
if(LVSet) { if (const LiveVarSet *LVSet = MInst2LVSetAI[MI]) {
return LVSet; // if found, just return the set return LVSet; // if found, just return the set
} else { } else {
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
assert(MInst2LVSetAI[MInst]); return MInst2LVSetAI[MI];
return MInst2LVSetAI[MInst];
} }
} }
@ -188,51 +173,31 @@ MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// This method calculates the live variable information for all the // This method calculates the live variable information for all the
// instructions in a basic block and enter the newly constructed live // 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)
{ void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *BB) {
const MachineCodeForBasicBlock& MIVec = BB->getMachineInstrVec(); const MachineCodeForBasicBlock &MIVec = BB->getMachineInstrVec();
MachineCodeForBasicBlock::const_reverse_iterator
MInstIterator = MIVec.rbegin();
LiveVarSet *CurSet = new LiveVarSet(); LiveVarSet *CurSet = new LiveVarSet();
const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet
CurSet->setUnion(SetAI); // CurSet now contains OutSet CurSet->setUnion(SetAI); // CurSet now contains OutSet
// iterate over all the machine instructions in BB // 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 MInst2LVSetAI[MI] = SetAI; // record in After Inst map
const MachineInstr * MInst = *MInstIterator;
MInst2LVSetAI[MInst] = SetAI; // record in After Inst map CurSet->applyTranferFuncForMInst(MI); // apply the transfer Func
CurSet->applyTranferFuncForMInst( MInst ); // apply the transfer Func
LiveVarSet *NewSet = new LiveVarSet(); // create a new set and 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 will be used in the next iteration
SetAI = NewSet; SetAI = NewSet;
} }
} }

123
lib/Target/SparcV9/LiveVar/FunctionLiveVarInfo.cpp
View File

@ -14,7 +14,6 @@
#include "llvm/BasicBlock.h" #include "llvm/BasicBlock.h"
#include "Support/PostOrderIterator.h" #include "Support/PostOrderIterator.h"
#include <iostream> #include <iostream>
using std::cerr;
AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>()); AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
@ -24,7 +23,7 @@ AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
bool MethodLiveVarInfo::runOnMethod(Method *M) { 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 // create and initialize all the BBLiveVars of the CFG
constructBBs(M); constructBBs(M);
@ -32,7 +31,7 @@ bool MethodLiveVarInfo::runOnMethod(Method *M) {
while (doSingleBackwardPass(M)) while (doSingleBackwardPass(M))
; // Iterate until we are done. ; // 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; return false;
} }
@ -48,7 +47,7 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
BBI != BBE; ++BBI, ++POId) { BBI != BBE; ++BBI, ++POId) {
const BasicBlock *BB = *BBI; // get the current BB 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 // create a new BBLiveVar
BBLiveVar *LVBB = new BBLiveVar(BB, POId); BBLiveVar *LVBB = new BBLiveVar(BB, POId);
@ -75,19 +74,16 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// do one backward pass over the CFG (for iterative analysis) // do one backward pass over the CFG (for iterative analysis)
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) { bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
bool ResultFlow, NeedAnotherIteration = false; if (DEBUG_LV) std::cerr << "\n After Backward Pass ...\n";
if (DEBUG_LV) bool NeedAnotherIteration = false;
cerr << "\n After Backward Pass ...\n"; for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
po_iterator<const Method*> BBI = po_begin(M);
for( ; BBI != po_end(M) ; ++BBI) {
BBLiveVar *LVBB = BB2BBLVMap[*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()) if(LVBB->isOutSetChanged())
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
@ -95,7 +91,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
if (LVBB->isInSetChanged()) // to calc Outsets of preds if (LVBB->isInSetChanged()) // to calc Outsets of preds
NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap); NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
if(DEBUG_LV) LVBB->printInOutSets(); if (DEBUG_LV) LVBB->printInOutSets();
} }
// true if we need to reiterate over the CFG // true if we need to reiterate over the CFG
@ -105,13 +101,10 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
void MethodLiveVarInfo::releaseMemory() { void MethodLiveVarInfo::releaseMemory() {
// First delete all BBLiveVar objects created in constructBBs(). A new object // First delete all BBLiveVar objects created in constructBBs(). A new object
// of type BBLiveVa is created for every BasicBlock in the method // of type BBLiveVar is created for every BasicBlock in the method
// hash map iterator for BB2BBLVMap
// //
BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(); for (BBToBBLiveVarMapType::iterator HMI = BB2BBLVMap.begin(),
HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
for( ; HMI != BB2BBLVMap.end(); ++HMI)
delete HMI->second; // delete all BBLiveVar in BB2BBLVMap delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
BB2BBLVMap.clear(); BB2BBLVMap.clear();
@ -121,12 +114,9 @@ void MethodLiveVarInfo::releaseMemory() {
// to return LiveVarSet's before/after a machine instruction quickly). It // to return LiveVarSet's before/after a machine instruction quickly). It
// is sufficient to free up all LiveVarSet using only one cache since // is sufficient to free up all LiveVarSet using only one cache since
// both caches refer to the same sets // both caches refer to the same sets
// hash map iterator for MInst2LVSetBI
// //
MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(); for (MInstToLiveVarSetMapType::iterator MI = MInst2LVSetBI.begin(),
ME = MInst2LVSetBI.end(); MI != ME; ++MI)
for( ; MI != MInst2LVSetBI.end(); ++MI)
delete MI->second; // delete all LiveVarSets in MInst2LVSetBI delete MI->second; // delete all LiveVarSets in MInst2LVSetBI
MInst2LVSetBI.clear(); MInst2LVSetBI.clear();
@ -137,30 +127,27 @@ void MethodLiveVarInfo::releaseMemory() {
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
/* Following functions will give the LiveVar info for any machine instr in // Following functions will give the LiveVar info for any machine instr in
a method. It should be called after a call to analyze(). // a method. It should be called after a call to analyze().
//
Thsese functions calucluates live var info for all the machine instrs in a // 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 // 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 // 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 // block. Also, the arguments to this method does not require specific
iterators. // iterators.
*/
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// Gives live variable information before a machine instruction // Gives live variable information before a machine instruction
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
const LiveVarSet * const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst, MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
const BasicBlock *CurBB) { const BasicBlock *BB) {
const LiveVarSet *LVSet = MInst2LVSetBI[MInst]; if (const LiveVarSet *LVSet = MInst2LVSetBI[MInst]) {
if (LVSet) {
return LVSet; // if found, just return the set return LVSet; // if found, just return the set
} else { } else {
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
assert(MInst2LVSetBI[MInst]);
return MInst2LVSetBI[MInst]; return MInst2LVSetBI[MInst];
} }
} }
@ -170,16 +157,14 @@ MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
// Gives live variable information after a machine instruction // Gives live variable information after a machine instruction
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
const LiveVarSet * const LiveVarSet *
MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst, MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MI,
const BasicBlock *CurBB) { const BasicBlock *BB) {
const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
if(LVSet) { if (const LiveVarSet *LVSet = MInst2LVSetAI[MI]) {
return LVSet; // if found, just return the set return LVSet; // if found, just return the set
} else { } else {
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB
assert(MInst2LVSetAI[MInst]); return MInst2LVSetAI[MI];
return MInst2LVSetAI[MInst];
} }
} }
@ -188,51 +173,31 @@ MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// This method calculates the live variable information for all the // This method calculates the live variable information for all the
// instructions in a basic block and enter the newly constructed live // 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)
{ void MethodLiveVarInfo::calcLiveVarSetsForBB(const BasicBlock *BB) {
const MachineCodeForBasicBlock& MIVec = BB->getMachineInstrVec(); const MachineCodeForBasicBlock &MIVec = BB->getMachineInstrVec();
MachineCodeForBasicBlock::const_reverse_iterator
MInstIterator = MIVec.rbegin();
LiveVarSet *CurSet = new LiveVarSet(); LiveVarSet *CurSet = new LiveVarSet();
const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet const LiveVarSet *SetAI = getOutSetOfBB(BB); // init SetAI with OutSet
CurSet->setUnion(SetAI); // CurSet now contains OutSet CurSet->setUnion(SetAI); // CurSet now contains OutSet
// iterate over all the machine instructions in BB // 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 MInst2LVSetAI[MI] = SetAI; // record in After Inst map
const MachineInstr * MInst = *MInstIterator;
MInst2LVSetAI[MInst] = SetAI; // record in After Inst map CurSet->applyTranferFuncForMInst(MI); // apply the transfer Func
CurSet->applyTranferFuncForMInst( MInst ); // apply the transfer Func
LiveVarSet *NewSet = new LiveVarSet(); // create a new set and 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 will be used in the next iteration
SetAI = NewSet; SetAI = NewSet;
} }
} }