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ed0881b2a67c530079dfd4141dbd9a899e6c1a7c
clang-p2996/llvm/lib/Target/Mips/MipsCodeEmitter.cpp
Chandler Carruth ed0881b2a6 Use the new script to sort the includes of every file under lib. 
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

llvm-svn: 169131
2012-12-03 16:50:05 +00:00

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//===-- Mips/MipsCodeEmitter.cpp - Convert Mips Code to Machine Code ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===---------------------------------------------------------------------===//
//
// This file contains the pass that transforms the Mips machine instructions
// into relocatable machine code.
//
//===---------------------------------------------------------------------===//
#define DEBUG_TYPE "jit"
#include "Mips.h"
#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsInstrInfo.h"
#include "MipsRelocations.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/PassManager.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#ifndef NDEBUG
#include <iomanip>
#endif
using namespace llvm;
STATISTIC(NumEmitted, "Number of machine instructions emitted");
namespace {
class MipsCodeEmitter : public MachineFunctionPass {
MipsJITInfo *JTI;
const MipsInstrInfo *II;
const DataLayout *TD;
const MipsSubtarget *Subtarget;
TargetMachine &TM;
JITCodeEmitter &MCE;
const std::vector<MachineConstantPoolEntry> *MCPEs;
const std::vector<MachineJumpTableEntry> *MJTEs;
bool IsPIC;
void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<MachineModuleInfo> ();
MachineFunctionPass::getAnalysisUsage(AU);
}
static char ID;
public:
MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce) :
MachineFunctionPass(ID), JTI(0),
II((const MipsInstrInfo *) tm.getInstrInfo()),
TD(tm.getDataLayout()), TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
IsPIC(TM.getRelocationModel() == Reloc::PIC_) {
}
bool runOnMachineFunction(MachineFunction &MF);
virtual const char *getPassName() const {
return "Mips Machine Code Emitter";
}
/// getBinaryCodeForInstr - This function, generated by the
/// CodeEmitterGenerator using TableGen, produces the binary encoding for
/// machine instructions.
uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
void emitInstruction(const MachineInstr &MI);
private:
void emitWordLE(unsigned Word);
/// Routines that handle operands which add machine relocations which are
/// fixed up by the relocation stage.
void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
bool MayNeedFarStub) const;
void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc) const;
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
unsigned getMachineOpValue(const MachineInstr &MI,
const MachineOperand &MO) const;
unsigned getRelocation(const MachineInstr &MI,
const MachineOperand &MO) const;
unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
unsigned getBranchTargetOpValue(const MachineInstr &MI,
unsigned OpNo) const;
unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
int emitULW(const MachineInstr &MI);
int emitUSW(const MachineInstr &MI);
int emitULH(const MachineInstr &MI);
int emitULHu(const MachineInstr &MI);
int emitUSH(const MachineInstr &MI);
void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
int Offset) const;
};
}
char MipsCodeEmitter::ID = 0;
bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
JTI = ((MipsTargetMachine&) MF.getTarget()).getJITInfo();
II = ((const MipsTargetMachine&) MF.getTarget()).getInstrInfo();
TD = ((const MipsTargetMachine&) MF.getTarget()).getDataLayout();
Subtarget = &TM.getSubtarget<MipsSubtarget> ();
MCPEs = &MF.getConstantPool()->getConstants();
MJTEs = 0;
if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
JTI->Initialize(MF, IsPIC);
MCE.setModuleInfo(&getAnalysis<MachineModuleInfo> ());
do {
DEBUG(errs() << "JITTing function '"
<< MF.getName() << "'\n");
MCE.startFunction(MF);
for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
MBB != E; ++MBB){
MCE.StartMachineBasicBlock(MBB);
for (MachineBasicBlock::instr_iterator I = MBB->instr_begin(),
E = MBB->instr_end(); I != E; ++I)
emitInstruction(*I);
}
} while (MCE.finishFunction(MF));
return false;
}
unsigned MipsCodeEmitter::getRelocation(const MachineInstr &MI,
const MachineOperand &MO) const {
// NOTE: This relocations are for static.
uint64_t TSFlags = MI.getDesc().TSFlags;
uint64_t Form = TSFlags & MipsII::FormMask;
if (Form == MipsII::FrmJ)
return Mips::reloc_mips_26;
if ((Form == MipsII::FrmI || Form == MipsII::FrmFI)
&& MI.isBranch())
return Mips::reloc_mips_pc16;
if (Form == MipsII::FrmI && MI.getOpcode() == Mips::LUi)
return Mips::reloc_mips_hi;
return Mips::reloc_mips_lo;
}
unsigned MipsCodeEmitter::getJumpTargetOpValue(const MachineInstr &MI,
unsigned OpNo) const {
MachineOperand MO = MI.getOperand(OpNo);
if (MO.isGlobal())
emitGlobalAddress(MO.getGlobal(), getRelocation(MI, MO), true);
else if (MO.isSymbol())
emitExternalSymbolAddress(MO.getSymbolName(), getRelocation(MI, MO));
else if (MO.isMBB())
emitMachineBasicBlock(MO.getMBB(), getRelocation(MI, MO));
else
llvm_unreachable("Unexpected jump target operand kind.");
return 0;
}
unsigned MipsCodeEmitter::getBranchTargetOpValue(const MachineInstr &MI,
unsigned OpNo) const {
MachineOperand MO = MI.getOperand(OpNo);
emitMachineBasicBlock(MO.getMBB(), getRelocation(MI, MO));
return 0;
}
unsigned MipsCodeEmitter::getMemEncoding(const MachineInstr &MI,
unsigned OpNo) const {
// Base register is encoded in bits 20-16, offset is encoded in bits 15-0.
assert(MI.getOperand(OpNo).isReg());
unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo)) << 16;
return (getMachineOpValue(MI, MI.getOperand(OpNo+1)) & 0xFFFF) | RegBits;
}
unsigned MipsCodeEmitter::getSizeExtEncoding(const MachineInstr &MI,
unsigned OpNo) const {
// size is encoded as size-1.
return getMachineOpValue(MI, MI.getOperand(OpNo)) - 1;
}
unsigned MipsCodeEmitter::getSizeInsEncoding(const MachineInstr &MI,
unsigned OpNo) const {
// size is encoded as pos+size-1.
return getMachineOpValue(MI, MI.getOperand(OpNo-1)) +
getMachineOpValue(MI, MI.getOperand(OpNo)) - 1;
}
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
unsigned MipsCodeEmitter::getMachineOpValue(const MachineInstr &MI,
const MachineOperand &MO) const {
if (MO.isReg())
return getMipsRegisterNumbering(MO.getReg());
else if (MO.isImm())
return static_cast<unsigned>(MO.getImm());
else if (MO.isGlobal())
emitGlobalAddress(MO.getGlobal(), getRelocation(MI, MO), true);
else if (MO.isSymbol())
emitExternalSymbolAddress(MO.getSymbolName(), getRelocation(MI, MO));
else if (MO.isCPI())
emitConstPoolAddress(MO.getIndex(), getRelocation(MI, MO));
else if (MO.isJTI())
emitJumpTableAddress(MO.getIndex(), getRelocation(MI, MO));
else if (MO.isMBB())
emitMachineBasicBlock(MO.getMBB(), getRelocation(MI, MO));
else
llvm_unreachable("Unable to encode MachineOperand!");
return 0;
}
void MipsCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
bool MayNeedFarStub) const {
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
const_cast<GlobalValue *>(GV), 0,
MayNeedFarStub));
}
void MipsCodeEmitter::emitGlobalAddressUnaligned(const GlobalValue *GV,
unsigned Reloc, int Offset) const {
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
const_cast<GlobalValue *>(GV), 0, false));
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset() + Offset,
Reloc, const_cast<GlobalValue *>(GV), 0, false));
}
void MipsCodeEmitter::
emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
Reloc, ES, 0, 0));
}
void MipsCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
Reloc, CPI, 0, false));
}
void MipsCodeEmitter::
emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
Reloc, JTIndex, 0, false));
}
void MipsCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
Reloc, BB));
}
int MipsCodeEmitter::emitUSW(const MachineInstr &MI) {
unsigned src = getMachineOpValue(MI, MI.getOperand(0));
unsigned base = getMachineOpValue(MI, MI.getOperand(1));
unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
// swr src, offset(base)
// swl src, offset+3(base)
MCE.emitWordLE(
(0x2e << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x2a << 26) | (base << 21) | (src << 16) | ((offset+3) & 0xffff));
return 2;
}
int MipsCodeEmitter::emitULW(const MachineInstr &MI) {
unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
unsigned base = getMachineOpValue(MI, MI.getOperand(1));
unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
unsigned at = 1;
if (dst != base) {
// lwr dst, offset(base)
// lwl dst, offset+3(base)
MCE.emitWordLE(
(0x26 << 26) | (base << 21) | (dst << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x22 << 26) | (base << 21) | (dst << 16) | ((offset+3) & 0xffff));
return 2;
} else {
// lwr at, offset(base)
// lwl at, offset+3(base)
// addu dst, at, $zero
MCE.emitWordLE(
(0x26 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x22 << 26) | (base << 21) | (at << 16) | ((offset+3) & 0xffff));
MCE.emitWordLE(
(0x0 << 26) | (at << 21) | (0x0 << 16) | (dst << 11) | (0x0 << 6) | 0x21);
return 3;
}
}
int MipsCodeEmitter::emitUSH(const MachineInstr &MI) {
unsigned src = getMachineOpValue(MI, MI.getOperand(0));
unsigned base = getMachineOpValue(MI, MI.getOperand(1));
unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
unsigned at = 1;
// sb src, offset(base)
// srl at,src,8
// sb at, offset+1(base)
MCE.emitWordLE(
(0x28 << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x0 << 26) | (0x0 << 21) | (src << 16) | (at << 11) | (0x8 << 6) | 0x2);
MCE.emitWordLE(
(0x28 << 26) | (base << 21) | (at << 16) | ((offset+1) & 0xffff));
return 3;
}
int MipsCodeEmitter::emitULH(const MachineInstr &MI) {
unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
unsigned base = getMachineOpValue(MI, MI.getOperand(1));
unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
unsigned at = 1;
// lbu at, offset(base)
// lb dst, offset+1(base)
// sll dst,dst,8
// or dst,dst,at
MCE.emitWordLE(
(0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x20 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
MCE.emitWordLE(
(0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
MCE.emitWordLE(
(0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
return 4;
}
int MipsCodeEmitter::emitULHu(const MachineInstr &MI) {
unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
unsigned base = getMachineOpValue(MI, MI.getOperand(1));
unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
unsigned at = 1;
// lbu at, offset(base)
// lbu dst, offset+1(base)
// sll dst,dst,8
// or dst,dst,at
MCE.emitWordLE(
(0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
MCE.emitWordLE(
(0x24 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
MCE.emitWordLE(
(0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
MCE.emitWordLE(
(0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
return 4;
}
void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
MCE.processDebugLoc(MI.getDebugLoc(), true);
// Skip pseudo instructions.
if ((MI.getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo)
return;
emitWordLE(getBinaryCodeForInstr(MI));
++NumEmitted; // Keep track of the # of mi's emitted
MCE.processDebugLoc(MI.getDebugLoc(), false);
}
void MipsCodeEmitter::emitWordLE(unsigned Word) {
DEBUG(errs() << " 0x";
errs().write_hex(Word) << "\n");
MCE.emitWordLE(Word);
}
/// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips
/// code to the specified MCE object.
FunctionPass *llvm::createMipsJITCodeEmitterPass(MipsTargetMachine &TM,
JITCodeEmitter &JCE) {
return new MipsCodeEmitter(TM, JCE);
}
#include "MipsGenCodeEmitter.inc"
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