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Remove my previous ugly hack that tries to reduce the stack space usage
of SelectCode to make way for a better solution. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
4eb40df1a8
commit
4e3c8e516f
@ -1832,27 +1832,6 @@ public:
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ISE(ise), Predicates(preds), Pattern(pattern), Instruction(instr),
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PatternNo(PatNum), OS(os), TmpNo(0) {}
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/// isPredeclaredSDOperand - Return true if this is one of the predeclared
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/// SDOperands.
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bool isPredeclaredSDOperand(const std::string &OpName) const {
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return OpName == "N0" || OpName == "N1" || OpName == "N2" ||
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OpName == "N00" || OpName == "N01" ||
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OpName == "N10" || OpName == "N11" ||
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OpName == "Tmp0" || OpName == "Tmp1" ||
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OpName == "Tmp2" || OpName == "Tmp3";
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}
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/// DeclareSDOperand - Emit "SDOperand <opname>" or "<opname>". This works
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/// around an ugly GCC bug where SelectCode is using too much stack space
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void DeclareSDOperand(const std::string &OpName) const {
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// If it's one of the common cases declared at the top of SelectCode, just
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// use the existing declaration.
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if (isPredeclaredSDOperand(OpName))
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OS << OpName;
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else
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OS << "SDOperand " << OpName;
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}
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/// EmitMatchCode - Emit a matcher for N, going to the label for PatternNo
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/// if the match fails. At this point, we already know that the opcode for N
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/// matches, and the SDNode for the result has the RootName specified name.
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@ -1926,9 +1905,8 @@ public:
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}
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for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
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OS << " ";
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DeclareSDOperand(RootName+utostr(OpNo));
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OS << " = " << RootName << ".getOperand(" << OpNo << ");\n";
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OS << " SDOperand " << RootName << OpNo << " = "
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<< RootName << ".getOperand(" << OpNo << ");\n";
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TreePatternNode *Child = N->getChild(i);
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if (!Child->isLeaf()) {
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@ -1999,7 +1977,7 @@ public:
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if (HasChain) {
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if (!FoundChain) {
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OS << " Chain = " << RootName << ".getOperand(0);\n";
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OS << " SDOperand Chain = " << RootName << ".getOperand(0);\n";
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FoundChain = true;
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}
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}
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@ -2039,41 +2017,30 @@ public:
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case MVT::i64: OS << " uint64_t Tmp"; break;
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}
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OS << ResNo << "C = cast<ConstantSDNode>(" << Val << ")->getValue();\n";
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = CurDAG->getTargetConstant(Tmp"
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OS << " SDOperand Tmp" << utostr(ResNo)
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<< " = CurDAG->getTargetConstant(Tmp"
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<< ResNo << "C, MVT::" << getEnumName(N->getTypeNum(0)) << ");\n";
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} else if (!N->isLeaf() && N->getOperator()->getName() == "tglobaladdr") {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = " << Val << ";\n";
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OS << " SDOperand Tmp" << ResNo << " = " << Val << ";\n";
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} else if (!N->isLeaf() && N->getOperator()->getName() == "tconstpool") {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = " << Val << ";\n";
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} else if (!N->isLeaf() && N->getOperator()->getName() == "texternalsym") {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = " << Val << ";\n";
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OS << " SDOperand Tmp" << ResNo << " = " << Val << ";\n";
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} else if (!N->isLeaf() && N->getOperator()->getName() == "texternalsym"){
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OS << " SDOperand Tmp" << ResNo << " = " << Val << ";\n";
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} else if (N->isLeaf() && (CP = NodeGetComplexPattern(N, ISE))) {
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std::string Fn = CP->getSelectFunc();
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NumRes = CP->getNumOperands();
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for (unsigned i = 0; i != NumRes; ++i) {
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if (!isPredeclaredSDOperand("Tmp" + utostr(i+ResNo))) {
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OS << " ";
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DeclareSDOperand("Tmp" + utostr(i+ResNo));
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OS << ";\n";
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}
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}
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OS << " SDOperand ";
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for (unsigned i = 0; i != NumRes; ++i)
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OS << "Tmp" << (i+ResNo) << ",";
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OS << ";\n";
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OS << " if (!" << Fn << "(" << Val;
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for (unsigned i = 0; i < NumRes; i++)
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OS << ", Tmp" << i + ResNo;
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OS << ")) goto P" << PatternNo << "Fail;\n";
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TmpNo = ResNo + NumRes;
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} else {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = Select(" << Val << ");\n";
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OS << " SDOperand Tmp" << ResNo << " = Select(" << Val << ");\n";
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}
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// Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
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// value if used multiple times by this pattern result.
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@ -2086,9 +2053,7 @@ public:
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if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
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unsigned ResNo = TmpNo++;
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if (DI->getDef()->isSubClassOf("Register")) {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = CurDAG->getRegister("
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OS << " SDOperand Tmp" << ResNo << " = CurDAG->getRegister("
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<< ISE.getQualifiedName(DI->getDef()) << ", MVT::"
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<< getEnumName(N->getTypeNum(0))
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<< ");\n";
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@ -2096,10 +2061,8 @@ public:
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}
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} else if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
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unsigned ResNo = TmpNo++;
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
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OS << " = CurDAG->getTargetConstant("
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OS << " SDOperand Tmp" << ResNo << " = CurDAG->getTargetConstant("
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<< II->getValue() << ", MVT::"
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<< getEnumName(N->getTypeNum(0))
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<< ");\n";
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@ -2125,7 +2088,7 @@ public:
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if (isRoot && PatternHasCtrlDep(Pattern, ISE))
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HasChain = true;
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if (HasInFlag || HasOutFlag)
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OS << " InFlag = SDOperand(0, 0);\n";
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OS << " SDOperand InFlag = SDOperand(0, 0);\n";
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// Determine operand emission order. Complex pattern first.
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std::vector<std::pair<unsigned, TreePatternNode*> > EmitOrder;
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@ -2167,9 +2130,7 @@ public:
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unsigned NumResults = Inst.getNumResults();
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unsigned ResNo = TmpNo++;
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if (!isRoot) {
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = CurDAG->getTargetNode("
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OS << " SDOperand Tmp" << ResNo << " = CurDAG->getTargetNode("
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<< II.Namespace << "::" << II.TheDef->getName();
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if (N->getTypeNum(0) != MVT::isVoid)
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OS << ", MVT::" << getEnumName(N->getTypeNum(0));
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@ -2188,7 +2149,7 @@ public:
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<< NumResults << ");\n";
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}
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} else if (HasChain || HasOutFlag) {
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OS << " Result = CurDAG->getTargetNode("
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OS << " SDOperand Result = CurDAG->getTargetNode("
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<< II.Namespace << "::" << II.TheDef->getName();
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// Output order: results, chain, flags
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@ -2295,9 +2256,7 @@ public:
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assert(N->getNumChildren() == 1 && "node xform should have one child!");
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unsigned OpVal = EmitResultCode(N->getChild(0)).second;
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unsigned ResNo = TmpNo++;
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OS << " ";
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DeclareSDOperand("Tmp"+utostr(ResNo));
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OS << " = Transform_" << Op->getName()
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OS << " SDOperand Tmp" << ResNo << " = Transform_" << Op->getName()
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<< "(Tmp" << OpVal << ".Val);\n";
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if (isRoot) {
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OS << " CodeGenMap[N] = Tmp" << ResNo << ";\n";
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@ -2376,7 +2335,7 @@ private:
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}
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if (isRoot && HasInFlag) {
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OS << " " << RootName << OpNo << " = " << RootName
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OS << " SDOperand " << RootName << OpNo << " = " << RootName
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<< ".getOperand(" << OpNo << ");\n";
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OS << " InFlag = Select(" << RootName << OpNo << ");\n";
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}
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@ -2517,8 +2476,6 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
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<< " std::map<SDOperand, SDOperand>::iterator CGMI = CodeGenMap.find(N);\n"
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<< " if (CGMI != CodeGenMap.end()) return CGMI->second;\n"
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<< " // Work arounds for GCC stack overflow bugs.\n"
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<< " SDOperand N0, N1, N2, N00, N01, N10, N11, Tmp0, Tmp1, Tmp2, Tmp3;\n"
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<< " SDOperand Chain, InFlag, Result;\n"
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<< " switch (N.getOpcode()) {\n"
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<< " default: break;\n"
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<< " case ISD::EntryToken: // These leaves remain the same.\n"
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@ -2544,7 +2501,7 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
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<< " CurDAG->getNode(ISD::TokenFactor, MVT::Other, Ops);\n"
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<< " }\n"
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<< " case ISD::CopyFromReg: {\n"
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<< " Chain = Select(N.getOperand(0));\n"
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<< " SDOperand Chain = Select(N.getOperand(0));\n"
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<< " unsigned Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();\n"
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<< " MVT::ValueType VT = N.Val->getValueType(0);\n"
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<< " if (N.Val->getNumValues() == 2) {\n"
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@ -2567,10 +2524,10 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
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<< " }\n"
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<< " }\n"
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<< " case ISD::CopyToReg: {\n"
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<< " Chain = Select(N.getOperand(0));\n"
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<< " SDOperand Chain = Select(N.getOperand(0));\n"
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<< " unsigned Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();\n"
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<< " SDOperand Val = Select(N.getOperand(2));\n"
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<< " Result = N;\n"
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<< " SDOperand Result = N;\n"
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<< " if (N.Val->getNumValues() == 1) {\n"
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<< " if (Chain != N.getOperand(0) || Val != N.getOperand(2))\n"
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<< " Result = CurDAG->getCopyToReg(Chain, Reg, Val);\n"
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