forked from OSchip/llvm-project
328 lines
10 KiB
C++
328 lines
10 KiB
C++
//===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===//
|
|
//
|
|
// 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 GAS-format SPARC assembly language.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DEBUG_TYPE "asm-printer"
|
|
#include "Sparc.h"
|
|
#include "SparcInstrInfo.h"
|
|
#include "SparcTargetMachine.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/DwarfWriter.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/MachineConstantPool.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/Target/TargetAsmInfo.h"
|
|
#include "llvm/Target/TargetLoweringObjectFile.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Support/Mangler.h"
|
|
#include "llvm/ADT/Statistic.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/MathExtras.h"
|
|
#include <cctype>
|
|
#include <cstring>
|
|
#include <map>
|
|
using namespace llvm;
|
|
|
|
STATISTIC(EmittedInsts, "Number of machine instrs printed");
|
|
|
|
namespace {
|
|
class VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
|
|
/// We name each basic block in a Function with a unique number, so
|
|
/// that we can consistently refer to them later. This is cleared
|
|
/// at the beginning of each call to runOnMachineFunction().
|
|
///
|
|
typedef std::map<const Value *, unsigned> ValueMapTy;
|
|
ValueMapTy NumberForBB;
|
|
unsigned BBNumber;
|
|
public:
|
|
explicit SparcAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
|
|
const TargetAsmInfo *T, bool V)
|
|
: AsmPrinter(O, TM, T, V), BBNumber(0) {}
|
|
|
|
virtual const char *getPassName() const {
|
|
return "Sparc Assembly Printer";
|
|
}
|
|
|
|
void PrintGlobalVariable(const GlobalVariable *GVar);
|
|
void printOperand(const MachineInstr *MI, int opNum);
|
|
void printMemOperand(const MachineInstr *MI, int opNum,
|
|
const char *Modifier = 0);
|
|
void printCCOperand(const MachineInstr *MI, int opNum);
|
|
|
|
void printInstruction(const MachineInstr *MI); // autogenerated.
|
|
bool runOnMachineFunction(MachineFunction &F);
|
|
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant, const char *ExtraCode);
|
|
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant, const char *ExtraCode);
|
|
};
|
|
} // end of anonymous namespace
|
|
|
|
#include "SparcGenAsmWriter.inc"
|
|
|
|
|
|
/// runOnMachineFunction - This uses the printInstruction()
|
|
/// method to print assembly for each instruction.
|
|
///
|
|
bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
|
|
this->MF = &MF;
|
|
|
|
SetupMachineFunction(MF);
|
|
|
|
// Print out constants referenced by the function
|
|
EmitConstantPool(MF.getConstantPool());
|
|
|
|
// BBNumber is used here so that a given Printer will never give two
|
|
// BBs the same name. (If you have a better way, please let me know!)
|
|
|
|
O << "\n\n";
|
|
|
|
// Print out the label for the function.
|
|
const Function *F = MF.getFunction();
|
|
SwitchToSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
|
|
EmitAlignment(MF.getAlignment(), F);
|
|
O << "\t.globl\t" << CurrentFnName << '\n';
|
|
|
|
printVisibility(CurrentFnName, F->getVisibility());
|
|
|
|
O << "\t.type\t" << CurrentFnName << ", #function\n";
|
|
O << CurrentFnName << ":\n";
|
|
|
|
// Number each basic block so that we can consistently refer to them
|
|
// in PC-relative references.
|
|
// FIXME: Why not use the MBB numbers?
|
|
NumberForBB.clear();
|
|
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
|
|
I != E; ++I) {
|
|
NumberForBB[I->getBasicBlock()] = BBNumber++;
|
|
}
|
|
|
|
// Print out code for the function.
|
|
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
|
|
I != E; ++I) {
|
|
// Print a label for the basic block.
|
|
if (I != MF.begin()) {
|
|
printBasicBlockLabel(I, true, true);
|
|
O << '\n';
|
|
}
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
|
|
II != E; ++II) {
|
|
// Print the assembly for the instruction.
|
|
printInstruction(II);
|
|
++EmittedInsts;
|
|
}
|
|
}
|
|
|
|
// We didn't modify anything.
|
|
return false;
|
|
}
|
|
|
|
void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
|
|
const MachineOperand &MO = MI->getOperand (opNum);
|
|
const TargetRegisterInfo &RI = *TM.getRegisterInfo();
|
|
bool CloseParen = false;
|
|
if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
|
|
O << "%hi(";
|
|
CloseParen = true;
|
|
} else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
|
|
!MO.isReg() && !MO.isImm()) {
|
|
O << "%lo(";
|
|
CloseParen = true;
|
|
}
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_Register:
|
|
if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
|
|
O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName);
|
|
else
|
|
O << "%reg" << MO.getReg();
|
|
break;
|
|
|
|
case MachineOperand::MO_Immediate:
|
|
O << (int)MO.getImm();
|
|
break;
|
|
case MachineOperand::MO_MachineBasicBlock:
|
|
printBasicBlockLabel(MO.getMBB());
|
|
return;
|
|
case MachineOperand::MO_GlobalAddress:
|
|
O << Mang->getMangledName(MO.getGlobal());
|
|
break;
|
|
case MachineOperand::MO_ExternalSymbol:
|
|
O << MO.getSymbolName();
|
|
break;
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
|
|
<< MO.getIndex();
|
|
break;
|
|
default:
|
|
llvm_unreachable("<unknown operand type>");
|
|
}
|
|
if (CloseParen) O << ")";
|
|
}
|
|
|
|
void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
|
|
const char *Modifier) {
|
|
printOperand(MI, opNum);
|
|
|
|
// If this is an ADD operand, emit it like normal operands.
|
|
if (Modifier && !strcmp(Modifier, "arith")) {
|
|
O << ", ";
|
|
printOperand(MI, opNum+1);
|
|
return;
|
|
}
|
|
|
|
if (MI->getOperand(opNum+1).isReg() &&
|
|
MI->getOperand(opNum+1).getReg() == SP::G0)
|
|
return; // don't print "+%g0"
|
|
if (MI->getOperand(opNum+1).isImm() &&
|
|
MI->getOperand(opNum+1).getImm() == 0)
|
|
return; // don't print "+0"
|
|
|
|
O << "+";
|
|
if (MI->getOperand(opNum+1).isGlobal() ||
|
|
MI->getOperand(opNum+1).isCPI()) {
|
|
O << "%lo(";
|
|
printOperand(MI, opNum+1);
|
|
O << ")";
|
|
} else {
|
|
printOperand(MI, opNum+1);
|
|
}
|
|
}
|
|
|
|
void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
|
|
int CC = (int)MI->getOperand(opNum).getImm();
|
|
O << SPARCCondCodeToString((SPCC::CondCodes)CC);
|
|
}
|
|
|
|
void SparcAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
if (!GVar->hasInitializer())
|
|
return; // External global require no code
|
|
|
|
// Check to see if this is a special global used by LLVM, if so, emit it.
|
|
if (EmitSpecialLLVMGlobal(GVar))
|
|
return;
|
|
|
|
O << "\n\n";
|
|
std::string name = Mang->getMangledName(GVar);
|
|
Constant *C = GVar->getInitializer();
|
|
unsigned Size = TD->getTypeAllocSize(C->getType());
|
|
unsigned Align = TD->getPreferredAlignment(GVar);
|
|
|
|
printVisibility(name, GVar->getVisibility());
|
|
|
|
SwitchToSection(getObjFileLowering().SectionForGlobal(GVar, Mang, TM));
|
|
|
|
if (C->isNullValue() && !GVar->hasSection()) {
|
|
if (!GVar->isThreadLocal() &&
|
|
(GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
|
|
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
|
|
|
|
if (GVar->hasLocalLinkage())
|
|
O << "\t.local " << name << '\n';
|
|
|
|
O << TAI->getCOMMDirective() << name << ',' << Size;
|
|
if (TAI->getCOMMDirectiveTakesAlignment())
|
|
O << ',' << (1 << Align);
|
|
|
|
O << '\n';
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (GVar->getLinkage()) {
|
|
case GlobalValue::CommonLinkage:
|
|
case GlobalValue::LinkOnceAnyLinkage:
|
|
case GlobalValue::LinkOnceODRLinkage:
|
|
case GlobalValue::WeakAnyLinkage: // FIXME: Verify correct for weak.
|
|
case GlobalValue::WeakODRLinkage: // FIXME: Verify correct for weak.
|
|
// Nonnull linkonce -> weak
|
|
O << "\t.weak " << name << '\n';
|
|
break;
|
|
case GlobalValue::AppendingLinkage:
|
|
// FIXME: appending linkage variables should go into a section of
|
|
// their name or something. For now, just emit them as external.
|
|
case GlobalValue::ExternalLinkage:
|
|
// If external or appending, declare as a global symbol
|
|
O << TAI->getGlobalDirective() << name << '\n';
|
|
// FALL THROUGH
|
|
case GlobalValue::PrivateLinkage:
|
|
case GlobalValue::LinkerPrivateLinkage:
|
|
case GlobalValue::InternalLinkage:
|
|
break;
|
|
case GlobalValue::GhostLinkage:
|
|
llvm_unreachable("Should not have any unmaterialized functions!");
|
|
case GlobalValue::DLLImportLinkage:
|
|
llvm_unreachable("DLLImport linkage is not supported by this target!");
|
|
case GlobalValue::DLLExportLinkage:
|
|
llvm_unreachable("DLLExport linkage is not supported by this target!");
|
|
default:
|
|
llvm_unreachable("Unknown linkage type!");
|
|
}
|
|
|
|
EmitAlignment(Align, GVar);
|
|
|
|
if (TAI->hasDotTypeDotSizeDirective()) {
|
|
O << "\t.type " << name << ",#object\n";
|
|
O << "\t.size " << name << ',' << Size << '\n';
|
|
}
|
|
|
|
O << name << ":\n";
|
|
EmitGlobalConstant(C);
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'r':
|
|
break;
|
|
}
|
|
}
|
|
|
|
printOperand(MI, OpNo);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
if (ExtraCode && ExtraCode[0])
|
|
return true; // Unknown modifier
|
|
|
|
O << '[';
|
|
printMemOperand(MI, OpNo);
|
|
O << ']';
|
|
|
|
return false;
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeSparcAsmPrinter() {
|
|
RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);
|
|
}
|