mirror of
https://github.com/c64scene-ar/llvm-6502.git
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be49526193
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1185 91177308-0d34-0410-b5e6-96231b3b80d8
367 lines
10 KiB
C++
367 lines
10 KiB
C++
// $Id$
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//***************************************************************************
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// File:
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// MachineInstr.cpp
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//
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// Purpose:
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//
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//
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// Strategy:
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//
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// History:
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// 7/2/01 - Vikram Adve - Created
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//**************************************************************************/
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/Target/MachineFrameInfo.h"
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#include "llvm/Target/MachineRegInfo.h"
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#include "llvm/Method.h"
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#include "llvm/iOther.h"
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#include "llvm/Instruction.h"
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AnnotationID MachineCodeForMethod::AID(
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AnnotationManager::getID("MachineCodeForMethodAnnotation"));
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//************************ Class Implementations **************************/
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// Constructor for instructions with fixed #operands (nearly all)
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MachineInstr::MachineInstr(MachineOpCode _opCode,
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OpCodeMask _opCodeMask)
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: opCode(_opCode),
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opCodeMask(_opCodeMask),
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operands(TargetInstrDescriptors[_opCode].numOperands)
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{
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assert(TargetInstrDescriptors[_opCode].numOperands >= 0);
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}
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// Constructor for instructions with variable #operands
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MachineInstr::MachineInstr(MachineOpCode _opCode,
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unsigned numOperands,
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OpCodeMask _opCodeMask)
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: opCode(_opCode),
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opCodeMask(_opCodeMask),
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operands(numOperands)
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{
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}
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void
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MachineInstr::SetMachineOperand(unsigned int i,
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MachineOperand::MachineOperandType operandType,
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Value* _val, bool isdef=false)
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{
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assert(i < operands.size());
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operands[i].Initialize(operandType, _val);
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operands[i].isDef = isdef ||
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TargetInstrDescriptors[opCode].resultPos == (int) i;
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}
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void
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MachineInstr::SetMachineOperand(unsigned int i,
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MachineOperand::MachineOperandType operandType,
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int64_t intValue, bool isdef=false)
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{
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assert(i < operands.size());
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operands[i].InitializeConst(operandType, intValue);
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operands[i].isDef = isdef ||
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TargetInstrDescriptors[opCode].resultPos == (int) i;
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}
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void
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MachineInstr::SetMachineOperand(unsigned int i,
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int regNum, bool isdef=false)
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{
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assert(i < operands.size());
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operands[i].InitializeReg(regNum);
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operands[i].isDef = isdef ||
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TargetInstrDescriptors[opCode].resultPos == (int) i;
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}
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void
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MachineInstr::dump(unsigned int indent) const
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{
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for (unsigned i=0; i < indent; i++)
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cout << " ";
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cout << *this;
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}
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ostream&
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operator<< (ostream& os, const MachineInstr& minstr)
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{
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os << TargetInstrDescriptors[minstr.opCode].opCodeString;
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for (unsigned i=0, N=minstr.getNumOperands(); i < N; i++)
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os << "\t" << minstr.getOperand(i);
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#undef DEBUG_VAL_OP_ITERATOR
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#ifdef DEBUG_VAL_OP_ITERATOR
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os << endl << "\tValue operands are: ";
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for (MachineInstr::val_op_const_iterator vo(&minstr); ! vo.done(); ++vo)
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{
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const Value* val = *vo;
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os << val << (vo.isDef()? "(def), " : ", ");
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}
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#endif
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#if 1
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// code for printing implict references
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unsigned NumOfImpRefs = minstr.getNumImplicitRefs();
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if( NumOfImpRefs > 0 ) {
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os << "\tImplicit:";
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for(unsigned z=0; z < NumOfImpRefs; z++) {
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os << minstr.getImplicitRef(z);
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cout << "\t";
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}
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}
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#endif
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os << endl;
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return os;
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}
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static inline ostream&
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OutputOperand(ostream &os, const MachineOperand &mop)
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{
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switch (mop.getOperandType())
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{
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case MachineOperand::MO_CCRegister:
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case MachineOperand::MO_VirtualRegister:
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return os << "(val " << mop.getVRegValue() << ")";
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case MachineOperand::MO_MachineRegister:
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return os << "(" << mop.getMachineRegNum() << ")";
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default:
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assert(0 && "Unknown operand type");
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return os;
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}
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}
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ostream&
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operator<<(ostream &os, const MachineOperand &mop)
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{
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switch(mop.opType)
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{
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case MachineOperand::MO_VirtualRegister:
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case MachineOperand::MO_MachineRegister:
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os << "%reg";
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return OutputOperand(os, mop);
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case MachineOperand::MO_CCRegister:
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os << "%ccreg";
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return OutputOperand(os, mop);
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case MachineOperand::MO_SignExtendedImmed:
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return os << mop.immedVal;
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case MachineOperand::MO_UnextendedImmed:
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return os << mop.immedVal;
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case MachineOperand::MO_PCRelativeDisp:
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{
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const Value* opVal = mop.getVRegValue();
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bool isLabel = isa<Method>(opVal) || isa<BasicBlock>(opVal);
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return os << "%disp("
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<< (isLabel? "label " : "addr-of-val ")
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<< opVal << ")";
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}
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default:
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assert(0 && "Unrecognized operand type");
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break;
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}
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return os;
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}
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static unsigned int
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ComputeMaxOptionalArgsSize(const TargetMachine& target, const Method* method)
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{
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const MachineFrameInfo& frameInfo = target.getFrameInfo();
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unsigned int maxSize = 0;
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for (Method::inst_const_iterator I=method->inst_begin(),E=method->inst_end();
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I != E; ++I)
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if ((*I)->getOpcode() == Instruction::Call)
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{
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CallInst* callInst = cast<CallInst>(*I);
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unsigned int numOperands = callInst->getNumOperands() - 1;
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unsigned int numExtra = numOperands
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- frameInfo.getNumFixedOutgoingArgs();
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unsigned int sizeForThisCall;
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if (frameInfo.argsOnStackHaveFixedSize())
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{
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int argSize = frameInfo.getSizeOfEachArgOnStack();
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sizeForThisCall = numExtra * (unsigned) argSize;
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}
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else
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{
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assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual arg sizes to compute MaxOptionalArgsSize");
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sizeForThisCall = 0;
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for (unsigned i=0; i < numOperands; ++i)
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sizeForThisCall += target.findOptimalStorageSize(callInst->
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getOperand(i)->getType());
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}
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if (maxSize < sizeForThisCall)
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maxSize = sizeForThisCall;
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}
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return maxSize;
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}
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/*ctor*/
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MachineCodeForMethod::MachineCodeForMethod(const Method* _M,
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const TargetMachine& target)
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: Annotation(AID),
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method(_M), compiledAsLeaf(false), staticStackSize(0),
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automaticVarsSize(0), regSpillsSize(0),
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currentOptionalArgsSize(0), maxOptionalArgsSize(0),
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currentTmpValuesSize(0)
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{
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maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, method);
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staticStackSize = maxOptionalArgsSize +
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target.getFrameInfo().getMinStackFrameSize();
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}
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int
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MachineCodeForMethod::allocateLocalVar(const TargetMachine& target,
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const Value* val)
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{
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// Check if we've allocated a stack slot for this value already
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//
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int offset = getOffset(val);
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if (offset == INVALID_FRAME_OFFSET)
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{
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bool growUp;
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int firstOffset =target.getFrameInfo().getFirstAutomaticVarOffset(*this,
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growUp);
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offset = growUp? firstOffset + getAutomaticVarsSize()
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: firstOffset - getAutomaticVarsSize();
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offsets[val] = offset;
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unsigned int size = target.findOptimalStorageSize(val->getType());
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incrementAutomaticVarsSize(size);
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}
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return offset;
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}
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int
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MachineCodeForMethod::allocateSpilledValue(const TargetMachine& target,
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const Type* type)
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{
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bool growUp;
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int firstOffset = target.getFrameInfo().getRegSpillAreaOffset(*this, growUp);
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int offset = growUp? firstOffset + getRegSpillsSize()
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: firstOffset - getRegSpillsSize();
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unsigned int size = target.findOptimalStorageSize(type);
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incrementRegSpillsSize(size);
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return offset;
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}
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int
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MachineCodeForMethod::allocateOptionalArg(const TargetMachine& target,
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const Type* type)
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{
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const MachineFrameInfo& frameInfo = target.getFrameInfo();
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bool growUp;
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int firstOffset = frameInfo.getFirstOptionalOutgoingArgOffset(*this, growUp);
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int offset = growUp? firstOffset + getCurrentOptionalArgsSize()
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: firstOffset - getCurrentOptionalArgsSize();
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int size = MAXINT;
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if (frameInfo.argsOnStackHaveFixedSize())
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size = frameInfo.getSizeOfEachArgOnStack();
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else
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{
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assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual argument sizes for computing optional arg offsets");
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size = target.findOptimalStorageSize(type);
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}
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incrementCurrentOptionalArgsSize(size);
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return offset;
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}
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void
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MachineCodeForMethod::resetOptionalArgs(const TargetMachine& target)
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{
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currentOptionalArgsSize = 0;
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}
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int
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MachineCodeForMethod::pushTempValue(const TargetMachine& target,
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unsigned int size)
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{
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bool growUp;
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int firstTmpOffset = target.getFrameInfo().getTmpAreaOffset(*this, growUp);
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int offset = growUp? firstTmpOffset + currentTmpValuesSize
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: firstTmpOffset - currentTmpValuesSize;
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currentTmpValuesSize += size;
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return offset;
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}
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void
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MachineCodeForMethod::popAllTempValues(const TargetMachine& target)
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{
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currentTmpValuesSize = 0;
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}
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// void
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// MachineCodeForMethod::putLocalVarAtOffsetFromSP(const Value* local,
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// int offset,
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// unsigned int size)
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// {
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// offsetsFromSP[local] = offset;
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// incrementAutomaticVarsSize(size);
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// }
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//
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int
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MachineCodeForMethod::getOffset(const Value* val) const
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{
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hash_map<const Value*, int>::const_iterator pair = offsets.find(val);
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return (pair == offsets.end())? INVALID_FRAME_OFFSET : (*pair).second;
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}
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// int
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// MachineCodeForMethod::getOffsetFromSP(const Value* local) const
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// {
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// hash_map<const Value*, int>::const_iterator pair = offsetsFromSP.find(local);
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// return (pair == offsetsFromSP.end())? INVALID_FRAME_OFFSET : (*pair).second;
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// }
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void
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MachineCodeForMethod::dump() const
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{
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cout << "\n" << method->getReturnType()
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<< " \"" << method->getName() << "\"" << endl;
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for (Method::const_iterator BI = method->begin(); BI != method->end(); ++BI)
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{
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BasicBlock* bb = *BI;
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cout << "\n"
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<< (bb->hasName()? bb->getName() : "Label")
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<< " (" << bb << ")" << ":"
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<< endl;
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MachineCodeForBasicBlock& mvec = bb->getMachineInstrVec();
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for (unsigned i=0; i < mvec.size(); i++)
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cout << "\t" << *mvec[i];
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}
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cout << endl << "End method \"" << method->getName() << "\""
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<< endl << endl;
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}
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