mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@863 91177308-0d34-0410-b5e6-96231b3b80d8
166 lines
4.6 KiB
C++
166 lines
4.6 KiB
C++
// $Id$
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//***************************************************************************
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// File:
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// Sparc.cpp
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//
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// Purpose:
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//
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// History:
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// 7/15/01 - Vikram Adve - Created
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//**************************************************************************/
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#include "llvm/Target/Sparc.h"
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#include "SparcInternals.h"
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#include "llvm/Method.h"
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#include "llvm/CodeGen/InstrScheduling.h"
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#include "llvm/CodeGen/InstrSelection.h"
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#include "llvm/Analysis/LiveVar/MethodLiveVarInfo.h"
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#include "llvm/CodeGen/PhyRegAlloc.h"
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// Build the MachineInstruction Description Array...
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const MachineInstrDescriptor SparcMachineInstrDesc[] = {
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#define I(ENUM, OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
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NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS) \
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{ OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
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NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS },
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#include "SparcInstr.def"
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};
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//----------------------------------------------------------------------------
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// allocateSparcTargetMachine - Allocate and return a subclass of TargetMachine
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// that implements the Sparc backend. (the llvm/CodeGen/Sparc.h interface)
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//----------------------------------------------------------------------------
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//
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TargetMachine *allocateSparcTargetMachine() { return new UltraSparc(); }
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//----------------------------------------------------------------------------
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// Entry point for register allocation for a module
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//----------------------------------------------------------------------------
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void AllocateRegisters(Method *M, TargetMachine &TM)
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{
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if ( (M)->isExternal() ) // don't process prototypes
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return;
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if( DEBUG_RA ) {
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cerr << endl << "******************** Method "<< (M)->getName();
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cerr << " ********************" <<endl;
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}
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MethodLiveVarInfo LVI(M ); // Analyze live varaibles
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LVI.analyze();
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PhyRegAlloc PRA(M, TM , &LVI); // allocate registers
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PRA.allocateRegisters();
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if( DEBUG_RA ) cerr << endl << "Register allocation complete!" << endl;
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}
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//---------------------------------------------------------------------------
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// class UltraSparcSchedInfo
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//
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// Purpose:
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// Scheduling information for the UltraSPARC.
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// Primarily just initializes machine-dependent parameters in
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// class MachineSchedInfo.
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//---------------------------------------------------------------------------
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/*ctor*/
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UltraSparcSchedInfo::UltraSparcSchedInfo(const MachineInstrInfo* mii)
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: MachineSchedInfo((unsigned int) SPARC_NUM_SCHED_CLASSES,
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mii,
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SparcRUsageDesc,
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SparcInstrUsageDeltas,
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SparcInstrIssueDeltas,
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sizeof(SparcInstrUsageDeltas)/sizeof(InstrRUsageDelta),
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sizeof(SparcInstrIssueDeltas)/sizeof(InstrIssueDelta))
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{
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maxNumIssueTotal = 4;
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longestIssueConflict = 0; // computed from issuesGaps[]
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branchMispredictPenalty = 4; // 4 for SPARC IIi
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branchTargetUnknownPenalty = 2; // 2 for SPARC IIi
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l1DCacheMissPenalty = 8; // 7 or 9 for SPARC IIi
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l1ICacheMissPenalty = 8; // ? for SPARC IIi
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inOrderLoads = true; // true for SPARC IIi
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inOrderIssue = true; // true for SPARC IIi
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inOrderExec = false; // false for most architectures
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inOrderRetire= true; // true for most architectures
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// must be called after above parameters are initialized.
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this->initializeResources();
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}
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void
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UltraSparcSchedInfo::initializeResources()
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{
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// Compute MachineSchedInfo::instrRUsages and MachineSchedInfo::issueGaps
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MachineSchedInfo::initializeResources();
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// Machine-dependent fixups go here. None for now.
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}
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//---------------------------------------------------------------------------
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// class UltraSparcMachine
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//
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// Purpose:
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// Primary interface to machine description for the UltraSPARC.
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// Primarily just initializes machine-dependent parameters in
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// class TargetMachine, and creates machine-dependent subclasses
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// for classes such as MachineInstrInfo.
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//
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//---------------------------------------------------------------------------
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UltraSparc::UltraSparc()
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: TargetMachine("UltraSparc-Native"),
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instrInfo(),
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schedInfo(&instrInfo),
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regInfo( this )
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{
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optSizeForSubWordData = 4;
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minMemOpWordSize = 8;
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maxAtomicMemOpWordSize = 8;
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}
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bool UltraSparc::compileMethod(Method *M) {
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if (SelectInstructionsForMethod(M, *this))
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{
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cerr << "Instruction selection failed for method " << M->getName()
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<< "\n\n";
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return true;
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}
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if (ScheduleInstructionsWithSSA(M, *this))
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{
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cerr << "Instruction scheduling before allocation failed for method "
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<< M->getName() << "\n\n";
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return true;
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}
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AllocateRegisters(M, *this); // allocate registers
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return false;
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}
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