mirror of
https://github.com/c64scene-ar/llvm-6502.git
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148b6a419f
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37926 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
//===-- ARM/ARMCodeEmitter.cpp - Convert ARM code to machine code ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the Raul Herbster (raulherbster [at] gmail [dot]
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// com) and is distributed under the University of Illinois Open Source License.
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// See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the pass that transforms the ARM machine instructions into
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// relocatable machine code.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "arm-emitter"
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#include "ARMInstrInfo.h"
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#include "ARMSubtarget.h"
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#include "ARMTargetMachine.h"
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#include "ARM.h"
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/MachineCodeEmitter.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/Function.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/Compiler.h"
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using namespace llvm;
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STATISTIC(NumEmitted, "Number of machine instructions emitted");
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namespace {
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class VISIBILITY_HIDDEN Emitter : public MachineFunctionPass {
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const ARMInstrInfo *II;
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const TargetData *TD;
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TargetMachine &TM;
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MachineCodeEmitter &MCE;
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public:
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static char ID;
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explicit Emitter(TargetMachine &tm, MachineCodeEmitter &mce)
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: MachineFunctionPass((intptr_t)&ID), II(0), TD(0), TM(tm),
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MCE(mce) {}
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Emitter(TargetMachine &tm, MachineCodeEmitter &mce,
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const ARMInstrInfo &ii, const TargetData &td)
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: MachineFunctionPass((intptr_t)&ID), II(&ii), TD(&td), TM(tm),
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MCE(mce) {}
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bool runOnMachineFunction(MachineFunction &MF);
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virtual const char *getPassName() const {
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return "ARM Machine Code Emitter";
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}
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void emitInstruction(const MachineInstr &MI);
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private:
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};
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char Emitter::ID = 0;
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}
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/// createARMCodeEmitterPass - Return a pass that emits the collected ARM code
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/// to the specified MCE object.
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FunctionPass *llvm::createARMCodeEmitterPass(ARMTargetMachine &TM,
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MachineCodeEmitter &MCE) {
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return new Emitter(TM, MCE);
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}
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bool Emitter::runOnMachineFunction(MachineFunction &MF) {
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assert((MF.getTarget().getRelocationModel() != Reloc::Default ||
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MF.getTarget().getRelocationModel() != Reloc::Static) &&
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"JIT relocation model must be set to static or default!");
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II = ((ARMTargetMachine&)MF.getTarget()).getInstrInfo();
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TD = ((ARMTargetMachine&)MF.getTarget()).getTargetData();
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do {
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MCE.startFunction(MF);
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for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
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MBB != E; ++MBB) {
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MCE.StartMachineBasicBlock(MBB);
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for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
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I != E; ++I)
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emitInstruction(*I);
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}
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} while (MCE.finishFunction(MF));
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return false;
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}
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void Emitter::emitInstruction(const MachineInstr &MI) {
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NumEmitted++; // Keep track of the # of mi's emitted
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}
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