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https://github.com/c64scene-ar/llvm-6502.git
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Clean up MethodLiveVarInfo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1703 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
5ff562e2c0
commit
bdfd328515
@ -72,9 +72,6 @@ static const int DEBUG_LV = 0;
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class MethodLiveVarInfo : public MethodPass {
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// Live var anal is done on this method - set by constructor
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const Method *Meth;
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// A map betwn the BasicBlock and BBLiveVar
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BBToBBLiveVarMapType BB2BBLVMap;
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@ -88,10 +85,10 @@ class MethodLiveVarInfo : public MethodPass {
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// --------- private methods -----------------------------------------
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// constructs BBLiveVars and init Def and In sets
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void constructBBs();
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void constructBBs(const Method *M);
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// do one backward pass over the CFG
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bool doSingleBackwardPass();
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bool doSingleBackwardPass(const Method *M);
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// calculates live var sets for instructions in a BB
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void calcLiveVarSetsForBB(const BasicBlock *BB);
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@ -100,7 +97,7 @@ class MethodLiveVarInfo : public MethodPass {
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public:
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static AnalysisID ID; // We are an analysis, we must have an ID
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MethodLiveVarInfo(AnalysisID id = ID) : Meth(0) { assert(id == ID); }
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MethodLiveVarInfo(AnalysisID id = ID) { assert(id == ID); }
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~MethodLiveVarInfo() { releaseMemory(); }
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// --------- Implement the MethodPass interface ----------------------
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@ -72,9 +72,6 @@ static const int DEBUG_LV = 0;
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class MethodLiveVarInfo : public MethodPass {
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// Live var anal is done on this method - set by constructor
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const Method *Meth;
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// A map betwn the BasicBlock and BBLiveVar
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BBToBBLiveVarMapType BB2BBLVMap;
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@ -88,10 +85,10 @@ class MethodLiveVarInfo : public MethodPass {
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// --------- private methods -----------------------------------------
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// constructs BBLiveVars and init Def and In sets
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void constructBBs();
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void constructBBs(const Method *M);
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// do one backward pass over the CFG
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bool doSingleBackwardPass();
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bool doSingleBackwardPass(const Method *M);
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// calculates live var sets for instructions in a BB
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void calcLiveVarSetsForBB(const BasicBlock *BB);
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@ -100,7 +97,7 @@ class MethodLiveVarInfo : public MethodPass {
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public:
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static AnalysisID ID; // We are an analysis, we must have an ID
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MethodLiveVarInfo(AnalysisID id = ID) : Meth(0) { assert(id == ID); }
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MethodLiveVarInfo(AnalysisID id = ID) { assert(id == ID); }
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~MethodLiveVarInfo() { releaseMemory(); }
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// --------- Implement the MethodPass interface ----------------------
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@ -14,11 +14,95 @@
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#include "llvm/BasicBlock.h"
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#include "Support/PostOrderIterator.h"
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#include <iostream>
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using std::cout;
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using std::endl;
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using std::cerr;
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AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
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//-----------------------------------------------------------------------------
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// Performs live var analysis for a method
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::runOnMethod(Method *M) {
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if (DEBUG_LV) cerr << "Analysing live variables ...\n";
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// create and initialize all the BBLiveVars of the CFG
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constructBBs(M);
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while (doSingleBackwardPass(M))
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; // Iterate until we are done.
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if (DEBUG_LV) cerr << "Live Variable Analysis complete!\n";
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return false;
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}
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//-----------------------------------------------------------------------------
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// constructs BBLiveVars and init Def and In sets
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//-----------------------------------------------------------------------------
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void MethodLiveVarInfo::constructBBs(const Method *M) {
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unsigned int POId = 0; // Reverse Depth-first Order ID
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for(po_iterator<const Method*> BBI = po_begin(M), BBE = po_end(M);
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BBI != BBE; ++BBI, ++POId) {
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const BasicBlock *BB = *BBI; // get the current BB
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if (DEBUG_LV) { cerr << " For BB "; printValue(BB); cerr << ":\n"; }
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// create a new BBLiveVar
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BBLiveVar *LVBB = new BBLiveVar(BB, POId);
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BB2BBLVMap[BB] = LVBB; // insert the pair to Map
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LVBB->calcDefUseSets(); // calculates the def and in set
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if (DEBUG_LV)
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LVBB->printAllSets();
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}
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// Since the PO iterator does not discover unreachable blocks,
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// go over the random iterator and init those blocks as well.
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// However, LV info is not correct for those blocks (they are not
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// analyzed)
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//
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for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
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BBRI != BBRE; ++BBRI, ++POId)
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if (!BB2BBLVMap[*BBRI]) // Not yet processed?
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BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
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}
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//-----------------------------------------------------------------------------
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// do one backward pass over the CFG (for iterative analysis)
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
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bool ResultFlow, NeedAnotherIteration = false;
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if (DEBUG_LV)
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cerr << "\n After Backward Pass ...\n";
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po_iterator<const Method*> BBI = po_begin(M);
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for( ; BBI != po_end(M) ; ++BBI) {
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BBLiveVar *LVBB = BB2BBLVMap[*BBI];
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assert(LVBB);
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if (DEBUG_LV) cerr << " For BB " << (*BBI)->getName() << ":\n";
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if(LVBB->isOutSetChanged())
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LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
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if (LVBB->isInSetChanged()) // to calc Outsets of preds
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NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
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if(DEBUG_LV) LVBB->printInOutSets();
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}
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// true if we need to reiterate over the CFG
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return NeedAnotherIteration;
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}
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void MethodLiveVarInfo::releaseMemory() {
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// First delete all BBLiveVar objects created in constructBBs(). A new object
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// of type BBLiveVa is created for every BasicBlock in the method
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@ -50,117 +134,6 @@ void MethodLiveVarInfo::releaseMemory() {
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}
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//-----------------------------------------------------------------------------
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// constructs BBLiveVars and init Def and In sets
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//-----------------------------------------------------------------------------
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void MethodLiveVarInfo::constructBBs()
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{
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unsigned int POId = 0; // Reverse Depth-first Order ID
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po_iterator<const Method*> BBI = po_begin(Meth);
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for( ; BBI != po_end(Meth) ; ++BBI, ++POId)
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{
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const BasicBlock *BB = *BBI; // get the current BB
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if(DEBUG_LV) { cout << " For BB "; printValue(BB); cout << ":" << endl; }
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// create a new BBLiveVar
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BBLiveVar * LVBB = new BBLiveVar( BB, POId );
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BB2BBLVMap[ BB ] = LVBB; // insert the pair to Map
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LVBB->calcDefUseSets(); // calculates the def and in set
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if(DEBUG_LV)
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LVBB->printAllSets();
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}
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// Since the PO iterator does not discover unreachable blocks,
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// go over the random iterator and init those blocks as well.
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// However, LV info is not correct for those blocks (they are not
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// analyzed)
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Method::const_iterator BBRI = Meth->begin(); // random iterator for BBs
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for( ; BBRI != Meth->end(); ++BBRI, ++POId) {
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if( ! BB2BBLVMap[ *BBRI ] )
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BB2BBLVMap[ *BBRI ] = new BBLiveVar( *BBRI, POId );
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}
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}
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//-----------------------------------------------------------------------------
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// do one backward pass over the CFG (for iterative analysis)
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::doSingleBackwardPass()
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{
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bool ResultFlow, NeedAnotherIteration = false;
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if(DEBUG_LV)
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cout << endl << " After Backward Pass ..." << endl;
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po_iterator<const Method*> BBI = po_begin(Meth);
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for( ; BBI != po_end(Meth) ; ++BBI)
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{
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BBLiveVar* LVBB = BB2BBLVMap[*BBI];
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assert( LVBB );
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if(DEBUG_LV) cout << " For BB " << (*BBI)->getName() << ":" << endl;
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// cout << " (POId=" << LVBB->getPOId() << ")" << endl ;
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ResultFlow = false;
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if( LVBB->isOutSetChanged() )
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LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
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if( LVBB->isInSetChanged() ) // to calc Outsets of preds
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ResultFlow = LVBB->applyFlowFunc(BB2BBLVMap);
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if(DEBUG_LV) LVBB->printInOutSets();
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if( ResultFlow ) NeedAnotherIteration = true;
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}
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// true if we need to reiterate over the CFG
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return NeedAnotherIteration;
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}
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//-----------------------------------------------------------------------------
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// performs live var anal for a method
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::runOnMethod(Method *M) {
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Meth = M;
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if( DEBUG_LV) cout << "Analysing live variables ...\n";
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// create and initialize all the BBLiveVars of the CFG
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constructBBs();
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bool NeedAnotherIteration = false;
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do { // do one pass over CFG
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NeedAnotherIteration = doSingleBackwardPass( );
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} while (NeedAnotherIteration ); // repeat until we need more iterations
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if( DEBUG_LV) cout << "Live Variable Analysis complete!\n";
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return false;
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}
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//-----------------------------------------------------------------------------
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@ -178,23 +151,17 @@ bool MethodLiveVarInfo::runOnMethod(Method *M) {
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//-----------------------------------------------------------------------------
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// Gives live variable information before a machine instruction
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//-----------------------------------------------------------------------------
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const LiveVarSet *
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MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *const MInst,
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const BasicBlock *const CurBB)
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{
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const LiveVarSet *
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MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst,
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const BasicBlock *CurBB) {
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const LiveVarSet *LVSet = MInst2LVSetBI[MInst];
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if( LVSet ) return LVSet; // if found, just return the set
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else {
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calcLiveVarSetsForBB( CurBB ); // else, calc for all instrs in BB
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/*if( ! MInst2LVSetBI[ MInst ] ) {
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cerr << "\nFor BB "; printValue( CurBB);
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cerr << "\nRequested LVSet for inst: " << *MInst;
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}*/
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assert( MInst2LVSetBI[ MInst ] );
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return MInst2LVSetBI[ MInst ];
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if (LVSet) {
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return LVSet; // if found, just return the set
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} else {
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calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
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assert(MInst2LVSetBI[MInst]);
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return MInst2LVSetBI[MInst];
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}
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}
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@ -203,16 +170,16 @@ MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *const MInst,
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// Gives live variable information after a machine instruction
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//-----------------------------------------------------------------------------
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const LiveVarSet *
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MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *const MInst,
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const BasicBlock *const CurBB)
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{
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MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
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const BasicBlock *CurBB) {
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const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
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if( LVSet ) return LVSet; // if found, just return the set
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else {
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calcLiveVarSetsForBB( CurBB ); // else, calc for all instrs in BB
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assert( MInst2LVSetAI[ MInst ] );
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return MInst2LVSetAI[ MInst ];
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if(LVSet) {
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return LVSet; // if found, just return the set
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} else {
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calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
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assert(MInst2LVSetAI[MInst]);
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return MInst2LVSetAI[MInst];
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}
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}
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@ -14,11 +14,95 @@
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#include "llvm/BasicBlock.h"
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#include "Support/PostOrderIterator.h"
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#include <iostream>
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using std::cout;
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using std::endl;
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using std::cerr;
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AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
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//-----------------------------------------------------------------------------
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// Performs live var analysis for a method
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::runOnMethod(Method *M) {
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if (DEBUG_LV) cerr << "Analysing live variables ...\n";
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// create and initialize all the BBLiveVars of the CFG
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constructBBs(M);
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while (doSingleBackwardPass(M))
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; // Iterate until we are done.
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if (DEBUG_LV) cerr << "Live Variable Analysis complete!\n";
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return false;
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}
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//-----------------------------------------------------------------------------
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// constructs BBLiveVars and init Def and In sets
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//-----------------------------------------------------------------------------
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void MethodLiveVarInfo::constructBBs(const Method *M) {
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unsigned int POId = 0; // Reverse Depth-first Order ID
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for(po_iterator<const Method*> BBI = po_begin(M), BBE = po_end(M);
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BBI != BBE; ++BBI, ++POId) {
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const BasicBlock *BB = *BBI; // get the current BB
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if (DEBUG_LV) { cerr << " For BB "; printValue(BB); cerr << ":\n"; }
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// create a new BBLiveVar
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BBLiveVar *LVBB = new BBLiveVar(BB, POId);
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BB2BBLVMap[BB] = LVBB; // insert the pair to Map
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LVBB->calcDefUseSets(); // calculates the def and in set
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if (DEBUG_LV)
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LVBB->printAllSets();
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}
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// Since the PO iterator does not discover unreachable blocks,
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// go over the random iterator and init those blocks as well.
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// However, LV info is not correct for those blocks (they are not
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// analyzed)
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//
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for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
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BBRI != BBRE; ++BBRI, ++POId)
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if (!BB2BBLVMap[*BBRI]) // Not yet processed?
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BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
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}
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//-----------------------------------------------------------------------------
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// do one backward pass over the CFG (for iterative analysis)
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
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bool ResultFlow, NeedAnotherIteration = false;
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if (DEBUG_LV)
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cerr << "\n After Backward Pass ...\n";
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po_iterator<const Method*> BBI = po_begin(M);
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for( ; BBI != po_end(M) ; ++BBI) {
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BBLiveVar *LVBB = BB2BBLVMap[*BBI];
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assert(LVBB);
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if (DEBUG_LV) cerr << " For BB " << (*BBI)->getName() << ":\n";
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if(LVBB->isOutSetChanged())
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LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
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if (LVBB->isInSetChanged()) // to calc Outsets of preds
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NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
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if(DEBUG_LV) LVBB->printInOutSets();
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}
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// true if we need to reiterate over the CFG
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return NeedAnotherIteration;
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}
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void MethodLiveVarInfo::releaseMemory() {
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// First delete all BBLiveVar objects created in constructBBs(). A new object
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// of type BBLiveVa is created for every BasicBlock in the method
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@ -50,117 +134,6 @@ void MethodLiveVarInfo::releaseMemory() {
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}
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//-----------------------------------------------------------------------------
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// constructs BBLiveVars and init Def and In sets
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//-----------------------------------------------------------------------------
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void MethodLiveVarInfo::constructBBs()
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{
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unsigned int POId = 0; // Reverse Depth-first Order ID
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po_iterator<const Method*> BBI = po_begin(Meth);
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for( ; BBI != po_end(Meth) ; ++BBI, ++POId)
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{
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const BasicBlock *BB = *BBI; // get the current BB
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if(DEBUG_LV) { cout << " For BB "; printValue(BB); cout << ":" << endl; }
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// create a new BBLiveVar
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BBLiveVar * LVBB = new BBLiveVar( BB, POId );
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BB2BBLVMap[ BB ] = LVBB; // insert the pair to Map
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LVBB->calcDefUseSets(); // calculates the def and in set
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if(DEBUG_LV)
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LVBB->printAllSets();
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}
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// Since the PO iterator does not discover unreachable blocks,
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// go over the random iterator and init those blocks as well.
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// However, LV info is not correct for those blocks (they are not
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// analyzed)
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Method::const_iterator BBRI = Meth->begin(); // random iterator for BBs
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for( ; BBRI != Meth->end(); ++BBRI, ++POId) {
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if( ! BB2BBLVMap[ *BBRI ] )
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BB2BBLVMap[ *BBRI ] = new BBLiveVar( *BBRI, POId );
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}
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}
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//-----------------------------------------------------------------------------
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// do one backward pass over the CFG (for iterative analysis)
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::doSingleBackwardPass()
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{
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bool ResultFlow, NeedAnotherIteration = false;
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if(DEBUG_LV)
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cout << endl << " After Backward Pass ..." << endl;
|
||||
|
||||
po_iterator<const Method*> BBI = po_begin(Meth);
|
||||
|
||||
for( ; BBI != po_end(Meth) ; ++BBI)
|
||||
{
|
||||
|
||||
BBLiveVar* LVBB = BB2BBLVMap[*BBI];
|
||||
assert( LVBB );
|
||||
|
||||
if(DEBUG_LV) cout << " For BB " << (*BBI)->getName() << ":" << endl;
|
||||
// cout << " (POId=" << LVBB->getPOId() << ")" << endl ;
|
||||
|
||||
ResultFlow = false;
|
||||
|
||||
if( LVBB->isOutSetChanged() )
|
||||
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
|
||||
|
||||
if( LVBB->isInSetChanged() ) // to calc Outsets of preds
|
||||
ResultFlow = LVBB->applyFlowFunc(BB2BBLVMap);
|
||||
|
||||
if(DEBUG_LV) LVBB->printInOutSets();
|
||||
|
||||
|
||||
if( ResultFlow ) NeedAnotherIteration = true;
|
||||
|
||||
}
|
||||
|
||||
// true if we need to reiterate over the CFG
|
||||
return NeedAnotherIteration;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
// performs live var anal for a method
|
||||
//-----------------------------------------------------------------------------
|
||||
|
||||
bool MethodLiveVarInfo::runOnMethod(Method *M) {
|
||||
Meth = M;
|
||||
|
||||
if( DEBUG_LV) cout << "Analysing live variables ...\n";
|
||||
|
||||
// create and initialize all the BBLiveVars of the CFG
|
||||
constructBBs();
|
||||
|
||||
bool NeedAnotherIteration = false;
|
||||
do { // do one pass over CFG
|
||||
NeedAnotherIteration = doSingleBackwardPass( );
|
||||
} while (NeedAnotherIteration ); // repeat until we need more iterations
|
||||
|
||||
|
||||
if( DEBUG_LV) cout << "Live Variable Analysis complete!\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
@ -178,23 +151,17 @@ bool MethodLiveVarInfo::runOnMethod(Method *M) {
|
||||
//-----------------------------------------------------------------------------
|
||||
// Gives live variable information before a machine instruction
|
||||
//-----------------------------------------------------------------------------
|
||||
const LiveVarSet *
|
||||
MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *const MInst,
|
||||
const BasicBlock *const CurBB)
|
||||
{
|
||||
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
|
||||
else {
|
||||
calcLiveVarSetsForBB( CurBB ); // else, calc for all instrs in BB
|
||||
|
||||
/*if( ! MInst2LVSetBI[ MInst ] ) {
|
||||
cerr << "\nFor BB "; printValue( CurBB);
|
||||
cerr << "\nRequested LVSet for inst: " << *MInst;
|
||||
}*/
|
||||
|
||||
assert( MInst2LVSetBI[ MInst ] );
|
||||
return MInst2LVSetBI[ MInst ];
|
||||
if (LVSet) {
|
||||
return LVSet; // if found, just return the set
|
||||
} else {
|
||||
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
|
||||
assert(MInst2LVSetBI[MInst]);
|
||||
return MInst2LVSetBI[MInst];
|
||||
}
|
||||
}
|
||||
|
||||
@ -203,16 +170,16 @@ MethodLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *const MInst,
|
||||
// Gives live variable information after a machine instruction
|
||||
//-----------------------------------------------------------------------------
|
||||
const LiveVarSet *
|
||||
MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *const MInst,
|
||||
const BasicBlock *const CurBB)
|
||||
{
|
||||
MethodLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MInst,
|
||||
const BasicBlock *CurBB) {
|
||||
const LiveVarSet *LVSet = MInst2LVSetAI[MInst];
|
||||
|
||||
if( LVSet ) return LVSet; // if found, just return the set
|
||||
else {
|
||||
calcLiveVarSetsForBB( CurBB ); // else, calc for all instrs in BB
|
||||
assert( MInst2LVSetAI[ MInst ] );
|
||||
return MInst2LVSetAI[ MInst ];
|
||||
if(LVSet) {
|
||||
return LVSet; // if found, just return the set
|
||||
} else {
|
||||
calcLiveVarSetsForBB(CurBB); // else, calc for all instrs in BB
|
||||
assert(MInst2LVSetAI[MInst]);
|
||||
return MInst2LVSetAI[MInst];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user