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For phi elimination, now we are generating only one instruction

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using cpValue2Value instead of
passing vector to createCopyInstructionByType.

llvm-svn: 1272
This commit is contained in:
Ruchira Sasanka 2001-11-12 19:42:27 +00:00
parent 3e193c7709
commit d6c5e0f535
1 changed files with 5 additions and 15 deletions
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20
lib/CodeGen/InstrSelection/InstrSelection.cpp
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@ -154,7 +154,7 @@ SelectInstructionsForMethod(Method* method, TargetMachine &target)
// of phi elimination.
//-------------------------------------------------------------------------
void InsertPhiElimInst(BasicBlock *BB, vector<MachineInstr*>& CopyInstVec) { // bak
void InsertPhiElimInst(BasicBlock *BB, MachineInstr *CpMI) {
TerminatorInst *TermInst = BB->getTerminator();
MachineCodeForVMInstr &MC4Term = TermInst->getMachineInstrVec();
@ -171,13 +171,12 @@ void InsertPhiElimInst(BasicBlock *BB, vector<MachineInstr*>& CopyInstVec) { //
for( ; (MCIt != bbMvec.end()) && (*MCIt != FirstMIOfTerm) ; ++MCIt ) ;
assert( MCIt != bbMvec.end() && "Start inst of terminator not found");
assert( (CopyInstVec.size()==1) && "Must be only one copy instr");
// insert the copy instruction just before the first machine instruction
// generated for the terminator
bbMvec.insert( MCIt , CopyInstVec[0] );
bbMvec.insert( MCIt , CpMI );
cerr << "\nPhiElimination copy inst: " << *CopyInstVec[0];
//cerr << "\nPhiElimination copy inst: " << *CopyInstVec[0];
}
@ -212,19 +211,10 @@ void InsertCode4AllPhisInMeth(Method *method, TargetMachine &target) {
vector<MachineInstr*> CopyInstVec;
// target.getInstrInfo().CreateCopyInstructionsByType(
// target, PN->getIncomingValue(i), PN, CopyInstVec );
MachineInstr *MI =
MachineInstr *CpMI =
target.getRegInfo().cpValue2Value(PN->getIncomingValue(i), PN);
CopyInstVec.push_back( MI );
InsertPhiElimInst( PN->getIncomingBlock(i), CopyInstVec);
// Map the generated copy instruction in pred BB to this phi
// (PN->getMachineInstrVec()).push_back( CopyInstVec[0] );
InsertPhiElimInst( PN->getIncomingBlock(i), CpMI);
}
}
else break; // since PHI nodes can only be at the top