-//===-- AlphaAsmPrinter.cpp - Alpha LLVM assembly writer --------------===//
-//
+//===-- AlphaAsmPrinter.cpp - Alpha LLVM assembly writer ------------------===//
+//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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
#include "Alpha.h"
#include "AlphaInstrInfo.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
+#include "AlphaTargetMachine.h"
#include "llvm/Module.h"
+#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/CodeGen/AsmPrinter.h"
-
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MRegisterInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-
#include "llvm/Support/Mangler.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/Support/CommandLine.h"
-#include <cctype>
+#include <iostream>
using namespace llvm;
namespace {
/// Unique incrementer for label values for referencing Global values.
///
unsigned LabelNumber;
-
- AlphaAsmPrinter(std::ostream &o, TargetMachine &tm)
- : AsmPrinter(o, tm), LabelNumber(0)
- { }
+
+ AlphaAsmPrinter(std::ostream &o, TargetMachine &tm)
+ : AsmPrinter(o, tm), LabelNumber(0) {
+ AlignmentIsInBytes = false;
+ PrivateGlobalPrefix = "$";
+ }
/// We name each basic block in a Function with a unique number, so
/// that we can consistently refer to them later. This is cleared
///
typedef std::map<const Value *, unsigned> ValueMapTy;
ValueMapTy NumberForBB;
+ std::string CurSection;
virtual const char *getPassName() const {
return "Alpha Assembly Printer";
}
bool printInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO, bool IsCallOp = false);
- void printConstantPool(MachineConstantPool *MCP);
- void printOperand(const MachineInstr *MI, int opNum, MVT::ValueType VT);
+ void printOperand(const MachineInstr *MI, int opNum);
void printBaseOffsetPair (const MachineInstr *MI, int i, bool brackets=true);
void printMachineInstruction(const MachineInstr *MI);
- bool runOnMachineFunction(MachineFunction &F);
+ bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
bool doFinalization(Module &M);
};
#include "AlphaGenAsmWriter.inc"
-void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum, MVT::ValueType VT)
+void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
{
const MachineOperand &MO = MI->getOperand(opNum);
if (MO.getType() == MachineOperand::MO_MachineRegister) {
assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
- O << LowercaseString(TM.getRegisterInfo()->get(MO.getReg()).Name);
+ O << TM.getRegisterInfo()->get(MO.getReg()).Name;
} else if (MO.isImmediate()) {
O << MO.getImmedValue();
} else {
void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
int new_symbol;
-
+
switch (MO.getType()) {
case MachineOperand::MO_VirtualRegister:
if (Value *V = MO.getVRegValueOrNull()) {
// FALLTHROUGH
case MachineOperand::MO_MachineRegister:
case MachineOperand::MO_CCRegister:
- O << LowercaseString(RI.get(MO.getReg()).Name);
+ O << RI.get(MO.getReg()).Name;
return;
case MachineOperand::MO_SignExtendedImmed:
return;
case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
+ std::cerr << "Shouldn't use addPCDisp() when building Alpha MachineInstrs";
abort();
return;
-
+
case MachineOperand::MO_MachineBasicBlock: {
MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << "$LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
+ O << PrivateGlobalPrefix << "LBB"
+ << Mang->getValueName(MBBOp->getParent()->getFunction())
<< "_" << MBBOp->getNumber() << "\t" << CommentString << " "
<< MBBOp->getBasicBlock()->getName();
return;
}
case MachineOperand::MO_ConstantPoolIndex:
- O << "$CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
+ O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
+ << MO.getConstantPoolIndex();
return;
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
return;
- case MachineOperand::MO_GlobalAddress:
- //std::cerr << "Global Addresses? Are you kidding?\n"
- //abort();
- O << Mang->getValueName(MO.getGlobal());
+ case MachineOperand::MO_GlobalAddress:
+ //Abuse PCrel to specify pcrel calls
+ //calls are the only thing that use this flag
+// if (MO.isPCRelative())
+// O << PrivateGlobalPrefix << Mang->getValueName(MO.getGlobal()) << "..ng";
+// else
+ O << Mang->getValueName(MO.getGlobal());
return;
-
+
default:
O << "<unknown operand type: " << MO.getType() << ">";
return;
++EmittedInsts;
if (printInstruction(MI))
return; // Printer was automatically generated
-
+
assert(0 && "Unhandled instruction in asm writer!");
abort();
return;
/// method to print assembly for each instruction.
///
bool AlphaAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- setupMachineFunction(MF);
+ SetupMachineFunction(MF);
O << "\n\n";
- if (CurrentFnName.compare("main") == 0)
- {
- O << "\n\n#HACK\n\t.text\n\t.ent __main\n__main:\n\tret $31,($26),1\n\t.end __main\n#ENDHACK\n\n";
- }
-
// Print out constants referenced by the function
- printConstantPool(MF.getConstantPool());
+ EmitConstantPool(MF.getConstantPool());
// Print out labels for the function.
- O << "\t.text\n";
- emitAlignment(2);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.ent\t" << CurrentFnName << "\n";
+ const Function *F = MF.getFunction();
+ SwitchSection(".text", F);
+ EmitAlignment(4, F);
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unknown linkage type!");
+ case Function::InternalLinkage: // Symbols default to internal.
+ break;
+ case Function::ExternalLinkage:
+ O << "\t.globl " << CurrentFnName << "\n";
+ break;
+ case Function::WeakLinkage:
+ case Function::LinkOnceLinkage:
+ O << "\t.weak " << CurrentFnName << "\n";
+ break;
+ }
+
+ O << "\t.ent " << CurrentFnName << "\n";
O << CurrentFnName << ":\n";
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
// Print a label for the basic block.
- O << "$LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"
- << CommentString << " " << I->getBasicBlock()->getName() << "\n";
+ O << PrivateGlobalPrefix << "LBB" << CurrentFnName << "_" << I->getNumber()
+ << ":\t" << CommentString << " " << I->getBasicBlock()->getName() << "\n";
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
}
++LabelNumber;
- O << "\t.end\t" << CurrentFnName << "\n";
+ O << "\t.end " << CurrentFnName << "\n";
// We didn't modify anything.
return false;
}
-
-/// printConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
-///
-void AlphaAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
- const std::vector<Constant*> &CP = MCP->getConstants();
- const TargetData &TD = TM.getTargetData();
-
- if (CP.empty()) return;
-
- abort();
-// for (unsigned i = 0, e = CP.size(); i != e; ++i) {
-// O << "\t.section\t.rodata\n";
-// emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
-// O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
-// << *CP[i] << "\n";
-// //emitGlobalConstant(CP[i]);
-// }
-}
-
bool AlphaAsmPrinter::doInitialization(Module &M)
{
AsmPrinter::doInitialization(M);
- O << "\t.arch ev56\n";
+ if(TM.getSubtarget<AlphaSubtarget>().hasF2I()
+ || TM.getSubtarget<AlphaSubtarget>().hasCT())
+ O << "\t.arch ev6\n";
+ else
+ O << "\t.arch ev56\n";
+ O << "\t.set noat\n";
return false;
}
-
-
-// SwitchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void SwitchSection(std::ostream &OS, std::string &CurSection,
- const char *NewSection) {
- if (CurSection != NewSection) {
- CurSection = NewSection;
- if (!CurSection.empty())
- OS << "\t" << NewSection << "\n";
- }
-}
bool AlphaAsmPrinter::doFinalization(Module &M) {
const TargetData &TD = TM.getTargetData();
- std::string CurSection;
-
- for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
+
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
if (I->hasInitializer()) { // External global require no code
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(I))
+ continue;
+
O << "\n\n";
std::string name = Mang->getValueName(I);
Constant *C = I->getInitializer();
unsigned Size = TD.getTypeSize(C->getType());
- unsigned Align = TD.getTypeAlignmentShift(C->getType());
+ // unsigned Align = TD.getTypeAlignmentShift(C->getType());
+ unsigned Align = getPreferredAlignmentLog(I);
- if (C->isNullValue() &&
+ if (C->isNullValue() &&
(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
I->hasWeakLinkage() /* FIXME: Verify correct */)) {
- SwitchSection(O, CurSection, ".data");
+ SwitchSection("\t.section .data", I);
if (I->hasInternalLinkage())
O << "\t.local " << name << "\n";
-
+
O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
- << "," << (1 << Align);
- O << "\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << "\n";
+ << "," << (1 << Align)
+ << "\n";
} else {
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
- SwitchSection(O, CurSection, "");
O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
+ SwitchSection("", I);
break;
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
O << "\t.globl " << name << "\n";
// FALL THROUGH
case GlobalValue::InternalLinkage:
- if (C->isNullValue())
- SwitchSection(O, CurSection, ".bss");
- else
- SwitchSection(O, CurSection, ".data");
+ SwitchSection(C->isNullValue() ? "\t.section .bss" :
+ "\t.section .data", I);
break;
case GlobalValue::GhostLinkage:
- std::cerr << "GhostLinkage cannot appear in X86AsmPrinter!\n";
+ std::cerr << "GhostLinkage cannot appear in AlphaAsmPrinter!\n";
abort();
}
- emitAlignment(Align);
+ EmitAlignment(Align);
O << "\t.type " << name << ",@object\n";
O << "\t.size " << name << "," << Size << "\n";
- O << name << ":\t\t\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << " = ";
- WriteAsOperand(O, C, false, false, &M);
- O << "\n";
- emitGlobalConstant(C);
+ O << name << ":\n";
+ EmitGlobalConstant(C);
}
}
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