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d55697cf13
routines supporting machine code optimization. Also added method MachineInstrInfo::getNOPOpCode(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3845 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
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//
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// This file contains the code for the Sparc Target that does not fit in any of
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// the other files in this directory.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcInternals.h"
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#include "llvm/Target/Sparc.h"
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#include "llvm/Function.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/CodeGen/MachineCodeForMethod.h"
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#include <iostream>
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using std::cerr;
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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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TargetMachine *allocateSparcTargetMachine() { return new UltraSparc(); }
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//---------------------------------------------------------------------------
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// class UltraSparcFrameInfo
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//
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// Purpose:
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// Interface to stack frame layout info for the UltraSPARC.
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// Starting offsets for each area of the stack frame are aligned at
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// a multiple of getStackFrameSizeAlignment().
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//---------------------------------------------------------------------------
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int
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UltraSparcFrameInfo::getFirstAutomaticVarOffset(MachineCodeForMethod& ,
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bool& pos) const
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{
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pos = false; // static stack area grows downwards
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return StaticAreaOffsetFromFP;
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}
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int
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UltraSparcFrameInfo::getRegSpillAreaOffset(MachineCodeForMethod& mcInfo,
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bool& pos) const
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{
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mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
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pos = false; // static stack area grows downwards
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unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
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return StaticAreaOffsetFromFP - autoVarsSize;
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}
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int
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UltraSparcFrameInfo::getTmpAreaOffset(MachineCodeForMethod& mcInfo,
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bool& pos) const
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{
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mcInfo.freezeAutomaticVarsArea(); // ensure no more auto vars are added
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mcInfo.freezeSpillsArea(); // ensure no more spill slots are added
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pos = false; // static stack area grows downwards
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unsigned int autoVarsSize = mcInfo.getAutomaticVarsSize();
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unsigned int spillAreaSize = mcInfo.getRegSpillsSize();
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int offset = autoVarsSize + spillAreaSize;
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return StaticAreaOffsetFromFP - offset;
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}
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int
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UltraSparcFrameInfo::getDynamicAreaOffset(MachineCodeForMethod& mcInfo,
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bool& pos) const
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{
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// Dynamic stack area grows downwards starting at top of opt-args area.
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// The opt-args, required-args, and register-save areas are empty except
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// during calls and traps, so they are shifted downwards on each
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// dynamic-size alloca.
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pos = false;
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unsigned int optArgsSize = mcInfo.getMaxOptionalArgsSize();
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if (int extra = optArgsSize % getStackFrameSizeAlignment())
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optArgsSize += (getStackFrameSizeAlignment() - extra);
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int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
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assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
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return offset;
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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(*this),
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schedInfo(*this),
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regInfo(*this),
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frameInfo(*this),
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cacheInfo(*this),
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optInfo(*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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