llvm-6502/lib/Target/Hexagon/HexagonAsmPrinter.cpp
Chandler Carruth d04a8d4b33 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. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03 16:50:05 +00:00

315 lines
10 KiB
C++

//===-- HexagonAsmPrinter.cpp - Print machine instrs to Hexagon assembly --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains a printer that converts from our internal representation
// of machine-dependent LLVM code to Hexagon assembly language. This printer is
// the output mechanism used by `llc'.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "HexagonAsmPrinter.h"
#include "Hexagon.h"
#include "HexagonMCInst.h"
#include "HexagonMachineFunctionInfo.h"
#include "HexagonSubtarget.h"
#include "HexagonTargetMachine.h"
#include "InstPrinter/HexagonInstPrinter.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/Constants.h"
#include "llvm/DataLayout.h"
#include "llvm/DerivedTypes.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
static cl::opt<bool> AlignCalls(
"hexagon-align-calls", cl::Hidden, cl::init(true),
cl::desc("Insert falign after call instruction for Hexagon target"));
void HexagonAsmPrinter::EmitAlignment(unsigned NumBits,
const GlobalValue *GV) const {
// For basic block level alignment, use ".falign".
if (!GV) {
OutStreamer.EmitRawText(StringRef("\t.falign"));
return;
}
AsmPrinter::EmitAlignment(NumBits, GV);
}
void HexagonAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(OpNo);
switch (MO.getType()) {
default: llvm_unreachable ("<unknown operand type>");
case MachineOperand::MO_Register:
O << HexagonInstPrinter::getRegisterName(MO.getReg());
return;
case MachineOperand::MO_Immediate:
O << MO.getImm();
return;
case MachineOperand::MO_MachineBasicBlock:
O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_JumpTableIndex:
O << *GetJTISymbol(MO.getIndex());
// FIXME: PIC relocation model.
return;
case MachineOperand::MO_ConstantPoolIndex:
O << *GetCPISymbol(MO.getIndex());
return;
case MachineOperand::MO_ExternalSymbol:
O << *GetExternalSymbolSymbol(MO.getSymbolName());
return;
case MachineOperand::MO_GlobalAddress:
// Computing the address of a global symbol, not calling it.
O << *Mang->getSymbol(MO.getGlobal());
printOffset(MO.getOffset(), O);
return;
}
}
//
// isBlockOnlyReachableByFallthrough - We need to override this since the
// default AsmPrinter does not print labels for any basic block that
// is only reachable by a fall through. That works for all cases except
// for the case in which the basic block is reachable by a fall through but
// through an indirect from a jump table. In this case, the jump table
// will contain a label not defined by AsmPrinter.
//
bool HexagonAsmPrinter::
isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
if (MBB->hasAddressTaken()) {
return false;
}
return AsmPrinter::isBlockOnlyReachableByFallthrough(MBB);
}
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool HexagonAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &OS) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.
switch (ExtraCode[0]) {
default:
// See if this is a generic print operand
return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, OS);
case 'c': // Don't print "$" before a global var name or constant.
// Hexagon never has a prefix.
printOperand(MI, OpNo, OS);
return false;
case 'L': // Write second word of DImode reference.
// Verify that this operand has two consecutive registers.
if (!MI->getOperand(OpNo).isReg() ||
OpNo+1 == MI->getNumOperands() ||
!MI->getOperand(OpNo+1).isReg())
return true;
++OpNo; // Return the high-part.
break;
case 'I':
// Write 'i' if an integer constant, otherwise nothing. Used to print
// addi vs add, etc.
if (MI->getOperand(OpNo).isImm())
OS << "i";
return false;
}
}
printOperand(MI, OpNo, OS);
return false;
}
bool HexagonAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
const MachineOperand &Base = MI->getOperand(OpNo);
const MachineOperand &Offset = MI->getOperand(OpNo+1);
if (Base.isReg())
printOperand(MI, OpNo, O);
else
llvm_unreachable("Unimplemented");
if (Offset.isImm()) {
if (Offset.getImm())
O << " + #" << Offset.getImm();
}
else
llvm_unreachable("Unimplemented");
return false;
}
void HexagonAsmPrinter::printPredicateOperand(const MachineInstr *MI,
unsigned OpNo,
raw_ostream &O) {
llvm_unreachable("Unimplemented");
}
/// printMachineInstruction -- Print out a single Hexagon MI in Darwin syntax to
/// the current output stream.
///
void HexagonAsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (MI->isBundle()) {
std::vector<const MachineInstr*> BundleMIs;
const MachineBasicBlock *MBB = MI->getParent();
MachineBasicBlock::const_instr_iterator MII = MI;
++MII;
unsigned int IgnoreCount = 0;
while (MII != MBB->end() && MII->isInsideBundle()) {
const MachineInstr *MInst = MII;
if (MInst->getOpcode() == TargetOpcode::DBG_VALUE ||
MInst->getOpcode() == TargetOpcode::IMPLICIT_DEF) {
IgnoreCount++;
++MII;
continue;
}
//BundleMIs.push_back(&*MII);
BundleMIs.push_back(MInst);
++MII;
}
unsigned Size = BundleMIs.size();
assert((Size+IgnoreCount) == MI->getBundleSize() && "Corrupt Bundle!");
for (unsigned Index = 0; Index < Size; Index++) {
HexagonMCInst MCI;
MCI.setStartPacket(Index == 0);
MCI.setEndPacket(Index == (Size-1));
HexagonLowerToMC(BundleMIs[Index], MCI, *this);
OutStreamer.EmitInstruction(MCI);
}
}
else {
HexagonMCInst MCI;
if (MI->getOpcode() == Hexagon::ENDLOOP0) {
MCI.setStartPacket(true);
MCI.setEndPacket(true);
}
HexagonLowerToMC(MI, MCI, *this);
OutStreamer.EmitInstruction(MCI);
}
return;
}
/// PrintUnmangledNameSafely - Print out the printable characters in the name.
/// Don't print things like \n or \0.
// static void PrintUnmangledNameSafely(const Value *V, raw_ostream &OS) {
// for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
// Name != E; ++Name)
// if (isprint(*Name))
// OS << *Name;
// }
void HexagonAsmPrinter::printAddrModeBasePlusOffset(const MachineInstr *MI,
int OpNo, raw_ostream &O) {
const MachineOperand &MO1 = MI->getOperand(OpNo);
const MachineOperand &MO2 = MI->getOperand(OpNo+1);
O << HexagonInstPrinter::getRegisterName(MO1.getReg())
<< " + #"
<< MO2.getImm();
}
void HexagonAsmPrinter::printGlobalOperand(const MachineInstr *MI, int OpNo,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(OpNo);
assert( (MO.getType() == MachineOperand::MO_GlobalAddress) &&
"Expecting global address");
O << *Mang->getSymbol(MO.getGlobal());
if (MO.getOffset() != 0) {
O << " + ";
O << MO.getOffset();
}
}
void HexagonAsmPrinter::printJumpTable(const MachineInstr *MI, int OpNo,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(OpNo);
assert( (MO.getType() == MachineOperand::MO_JumpTableIndex) &&
"Expecting jump table index");
// Hexagon_TODO: Do we need name mangling?
O << *GetJTISymbol(MO.getIndex());
}
void HexagonAsmPrinter::printConstantPool(const MachineInstr *MI, int OpNo,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(OpNo);
assert( (MO.getType() == MachineOperand::MO_ConstantPoolIndex) &&
"Expecting constant pool index");
// Hexagon_TODO: Do we need name mangling?
O << *GetCPISymbol(MO.getIndex());
}
static MCInstPrinter *createHexagonMCInstPrinter(const Target &T,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
const MCInstrInfo &MII,
const MCRegisterInfo &MRI,
const MCSubtargetInfo &STI) {
if (SyntaxVariant == 0)
return(new HexagonInstPrinter(MAI, MII, MRI));
else
return NULL;
}
extern "C" void LLVMInitializeHexagonAsmPrinter() {
RegisterAsmPrinter<HexagonAsmPrinter> X(TheHexagonTarget);
TargetRegistry::RegisterMCInstPrinter(TheHexagonTarget,
createHexagonMCInstPrinter);
}