IA64AsmPrinter.cpp [plain text]
#define DEBUG_TYPE "asm-printer"
#include "IA64.h"
#include "IA64TargetMachine.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
STATISTIC(EmittedInsts, "Number of machine instrs printed");
namespace {
class IA64AsmPrinter : public AsmPrinter {
std::set<std::string> ExternalFunctionNames, ExternalObjectNames;
public:
explicit IA64AsmPrinter(raw_ostream &O, TargetMachine &TM,
const TargetAsmInfo *T, CodeGenOpt::Level OL,
bool V)
: AsmPrinter(O, TM, T, OL, V) {}
virtual const char *getPassName() const {
return "IA64 Assembly Printer";
}
bool printInstruction(const MachineInstr *MI);
void printOperand(const MachineInstr *MI, unsigned OpNo){
const MachineOperand &MO = MI->getOperand(OpNo);
if (MO.getType() == MachineOperand::MO_Register) {
assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
"Not physref??");
O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
} else {
printOp(MO);
}
}
void printS8ImmOperand(const MachineInstr *MI, unsigned OpNo) {
int val=(unsigned int)MI->getOperand(OpNo).getImm();
if(val>=128) val=val-256; O << val;
}
void printS14ImmOperand(const MachineInstr *MI, unsigned OpNo) {
int val=(unsigned int)MI->getOperand(OpNo).getImm();
if(val>=8192) val=val-16384; O << val;
}
void printS22ImmOperand(const MachineInstr *MI, unsigned OpNo) {
int val=(unsigned int)MI->getOperand(OpNo).getImm();
if(val>=2097152) val=val-4194304; O << val;
}
void printU64ImmOperand(const MachineInstr *MI, unsigned OpNo) {
O << (uint64_t)MI->getOperand(OpNo).getImm();
}
void printS64ImmOperand(const MachineInstr *MI, unsigned OpNo) {
if (MI->getOperand(OpNo).isImm()) {
O << (int64_t)MI->getOperand(OpNo).getImm();
} else { printOp(MI->getOperand(OpNo));
}
}
void printGlobalOperand(const MachineInstr *MI, unsigned OpNo) {
printOp(MI->getOperand(OpNo), false); }
void printCallOperand(const MachineInstr *MI, unsigned OpNo) {
printOp(MI->getOperand(OpNo), true); }
void printMachineInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO, bool isBRCALLinsn= false);
void printModuleLevelGV(const GlobalVariable* GVar);
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
bool doFinalization(Module &M);
};
}
#include "IA64GenAsmWriter.inc"
bool IA64AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
this->MF = &MF;
SetupMachineFunction(MF);
O << "\n\n";
EmitConstantPool(MF.getConstantPool());
const Function *F = MF.getFunction();
SwitchToSection(TAI->SectionForGlobal(F));
EmitAlignment(5);
O << "\t.global\t" << CurrentFnName << '\n';
printVisibility(CurrentFnName, F->getVisibility());
O << "\t.type\t" << CurrentFnName << ", @function\n";
O << CurrentFnName << ":\n";
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
if (!I->pred_empty()) {
printBasicBlockLabel(I, true, true);
O << '\n';
}
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
printMachineInstruction(II);
}
}
return false;
}
void IA64AsmPrinter::printOp(const MachineOperand &MO,
bool isBRCALLinsn ) {
const TargetRegisterInfo &RI = *TM.getRegisterInfo();
switch (MO.getType()) {
case MachineOperand::MO_Register:
O << RI.get(MO.getReg()).AsmName;
return;
case MachineOperand::MO_Immediate:
O << MO.getImm();
return;
case MachineOperand::MO_MachineBasicBlock:
printBasicBlockLabel(MO.getMBB());
return;
case MachineOperand::MO_ConstantPoolIndex: {
O << "@gprel(" << TAI->getPrivateGlobalPrefix()
<< "CPI" << getFunctionNumber() << "_" << MO.getIndex() << ")";
return;
}
case MachineOperand::MO_GlobalAddress: {
GlobalValue *GV = MO.getGlobal();
Function *F = dyn_cast<Function>(GV);
bool Needfptr=false; if (F && !isBRCALLinsn )
Needfptr=true;
if (F && F->isDeclaration())
ExternalFunctionNames.insert(Mang->getValueName(MO.getGlobal()));
else
if (GV->isDeclaration()) ExternalObjectNames.insert(Mang->getValueName(MO.getGlobal()));
if (!isBRCALLinsn)
O << "@ltoff(";
if (Needfptr)
O << "@fptr(";
O << Mang->getValueName(MO.getGlobal());
if (Needfptr && !isBRCALLinsn)
O << "#))"; else {
if (Needfptr)
O << "#)"; if (!isBRCALLinsn)
O << "#)"; }
int Offset = MO.getOffset();
if (Offset > 0)
O << " + " << Offset;
else if (Offset < 0)
O << " - " << -Offset;
return;
}
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
ExternalFunctionNames.insert(MO.getSymbolName());
return;
default:
O << "<AsmPrinter: unknown operand type: " << MO.getType() << " >"; return;
}
}
void IA64AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
printInstruction(MI);
}
bool IA64AsmPrinter::doInitialization(Module &M) {
bool Result = AsmPrinter::doInitialization(M);
O << "\n.ident \"LLVM-ia64\"\n\n"
<< "\t.psr lsb\n" << "\t.radix C\n"
<< "\t.psr abi64\n"; return Result;
}
void IA64AsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
const TargetData *TD = TM.getTargetData();
if (!GVar->hasInitializer())
return;
if (EmitSpecialLLVMGlobal(GVar))
return;
O << "\n\n";
std::string name = Mang->getValueName(GVar);
Constant *C = GVar->getInitializer();
unsigned Size = TD->getTypePaddedSize(C->getType());
unsigned Align = TD->getPreferredAlignmentLog(GVar);
printVisibility(name, GVar->getVisibility());
SwitchToSection(TAI->SectionForGlobal(GVar));
if (C->isNullValue() && !GVar->hasSection()) {
if (!GVar->isThreadLocal() &&
(GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
if (Size == 0) Size = 1;
if (GVar->hasLocalLinkage()) {
O << "\t.lcomm " << name << "#," << Size
<< ',' << (1 << Align);
O << '\n';
} else {
O << "\t.common " << name << "#," << Size
<< ',' << (1 << Align);
O << '\n';
}
return;
}
}
switch (GVar->getLinkage()) {
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::CommonLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
O << "\t.weak " << name << '\n';
break;
case GlobalValue::AppendingLinkage:
case GlobalValue::ExternalLinkage:
O << TAI->getGlobalDirective() << name << '\n';
case GlobalValue::InternalLinkage:
case GlobalValue::PrivateLinkage:
break;
case GlobalValue::GhostLinkage:
cerr << "GhostLinkage cannot appear in IA64AsmPrinter!\n";
abort();
case GlobalValue::DLLImportLinkage:
cerr << "DLLImport linkage is not supported by this target!\n";
abort();
case GlobalValue::DLLExportLinkage:
cerr << "DLLExport linkage is not supported by this target!\n";
abort();
default:
assert(0 && "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);
}
bool IA64AsmPrinter::doFinalization(Module &M) {
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
printModuleLevelGV(I);
O << "\n\n// br.call targets referenced (and not defined) above: \n";
for (std::set<std::string>::iterator i = ExternalFunctionNames.begin(),
e = ExternalFunctionNames.end(); i!=e; ++i) {
O << "\t.global " << *i << "\n\t.type " << *i << ", @function\n";
}
O << "\n\n";
O << "\n\n// (external) symbols referenced (and not defined) above: \n";
for (std::set<std::string>::iterator i = ExternalObjectNames.begin(),
e = ExternalObjectNames.end(); i!=e; ++i) {
O << "\t.global " << *i << "\n\t.type " << *i << ", @object\n";
}
O << "\n\n";
return AsmPrinter::doFinalization(M);
}
FunctionPass *llvm::createIA64CodePrinterPass(raw_ostream &o,
IA64TargetMachine &tm,
CodeGenOpt::Level OptLevel,
bool verbose) {
return new IA64AsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
}