-//===-- SparcV8AsmPrinter.cpp - SparcV8 LLVM assembly writer --------------===//
+//===-- SparcAsmPrinter.cpp - Sparc 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 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 V8 assembly language.
+// of machine-dependent LLVM code to GAS-format SPARC assembly language.
//
//===----------------------------------------------------------------------===//
-#include "SparcV8.h"
-#include "SparcV8InstrInfo.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Module.h"
-#include "llvm/Assembly/Writer.h"
+#define DEBUG_TYPE "asm-printer"
+#include "Sparc.h"
+#include "SparcInstrInfo.h"
+#include "SparcTargetMachine.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/Target/TargetMachine.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 <iostream>
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
- Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
-
- struct SparcV8AsmPrinter : public AsmPrinter {
- SparcV8AsmPrinter(std::ostream &O, TargetMachine &TM) : AsmPrinter(O, TM) {
- Data16bitsDirective = "\t.half\t";
- Data32bitsDirective = "\t.word\t";
- Data64bitsDirective = 0; // .xword is only supported by V9.
- ZeroDirective = 0; // no .zero or .space!
- CommentString = "!";
- ConstantPoolSection = "\t.section \".rodata\",#alloc\n";
- }
-
- /// 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;
+ class SparcAsmPrinter : public AsmPrinter {
+ public:
+ explicit SparcAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : AsmPrinter(TM, Streamer) {}
virtual const char *getPassName() const {
- return "SparcV8 Assembly Printer";
+ return "Sparc Assembly Printer";
}
- void printOperand(const MachineInstr *MI, int opNum);
- void printMemOperand(const MachineInstr *MI, int opNum);
- bool printInstruction(const MachineInstr *MI); // autogenerated.
- bool runOnMachineFunction(MachineFunction &F);
- bool doInitialization(Module &M);
- bool doFinalization(Module &M);
- };
-} // end of anonymous namespace
-
-#include "SparcV8GenAsmWriter.inc"
+ void printOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
+ void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &OS,
+ const char *Modifier = 0);
+ void printCCOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
-/// createSparcV8CodePrinterPass - Returns a pass that prints the SparcV8
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description. This should work
-/// regardless of whether the function is in SSA form.
-///
-FunctionPass *llvm::createSparcV8CodePrinterPass (std::ostream &o,
- TargetMachine &tm) {
- return new SparcV8AsmPrinter(o, tm);
-}
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool SparcV8AsmPrinter::runOnMachineFunction(MachineFunction &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!)
- static unsigned BBNumber = 0;
-
- O << "\n\n";
- // What's my mangled name?
- CurrentFnName = Mang->getValueName(MF.getFunction());
+ virtual void EmitInstruction(const MachineInstr *MI) {
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ printInstruction(MI, OS);
+ OutStreamer.EmitRawText(OS.str());
+ }
+ void printInstruction(const MachineInstr *MI, raw_ostream &OS);// autogen'd.
+ static const char *getRegisterName(unsigned RegNo);
- // Print out labels for the function.
- O << "\t.text\n";
- O << "\t.align 16\n";
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.type\t" << CurrentFnName << ", #function\n";
- O << CurrentFnName << ":\n";
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode,
+ raw_ostream &O);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode,
+ raw_ostream &O);
- // Number each basic block so that we can consistently refer to them
- // in PC-relative references.
- NumberForBB.clear();
- for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
- I != E; ++I) {
- NumberForBB[I->getBasicBlock()] = BBNumber++;
- }
+ bool printGetPCX(const MachineInstr *MI, unsigned OpNo, raw_ostream &OS);
+
+ virtual bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB)
+ const;
- // 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())
- O << ".LBB" << Mang->getValueName(MF.getFunction ())
- << "_" << I->getNumber () << ":\t! "
- << I->getBasicBlock ()->getName () << "\n";
- for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
- II != E; ++II) {
- // Print the assembly for the instruction.
- O << "\t";
- printInstruction(II);
- ++EmittedInsts;
- }
- }
+ virtual MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
+ };
+} // end of anonymous namespace
- // We didn't modify anything.
- return false;
-}
+#include "SparcGenAsmWriter.inc"
-void SparcV8AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
const MachineOperand &MO = MI->getOperand (opNum);
- const MRegisterInfo &RI = *TM.getRegisterInfo();
bool CloseParen = false;
- if (MI->getOpcode() == V8::SETHIi && !MO.isRegister() && !MO.isImmediate()) {
+ if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
O << "%hi(";
CloseParen = true;
- } else if ((MI->getOpcode() == V8::ORri || MI->getOpcode() == V8::ADDri)
- && !MO.isRegister() && !MO.isImmediate()) {
+ } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
+ !MO.isReg() && !MO.isImm()) {
O << "%lo(";
CloseParen = true;
}
switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- if (Value *V = MO.getVRegValueOrNull()) {
- O << "<" << V->getName() << ">";
- break;
- }
- // FALLTHROUGH
- case MachineOperand::MO_MachineRegister:
- if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
- O << "%" << LowercaseString (RI.get(MO.getReg()).Name);
- else
- O << "%reg" << MO.getReg();
+ case MachineOperand::MO_Register:
+ O << "%" << StringRef(getRegisterName(MO.getReg())).lower();
break;
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- O << (int)MO.getImmedValue();
+ case MachineOperand::MO_Immediate:
+ O << (int)MO.getImm();
break;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t! "
- << MBBOp->getBasicBlock ()->getName ();
- return;
- }
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building SparcV8 MachineInstrs";
- abort ();
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_GlobalAddress:
- O << Mang->getValueName(MO.getGlobal());
+ O << *Mang->getSymbol(MO.getGlobal());
break;
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
break;
case MachineOperand::MO_ConstantPoolIndex:
- O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
- << MO.getConstantPoolIndex();
+ O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+ << MO.getIndex();
break;
default:
- O << "<unknown operand type>"; abort (); break;
+ llvm_unreachable("<unknown operand type>");
}
if (CloseParen) O << ")";
}
-void SparcV8AsmPrinter::printMemOperand(const MachineInstr *MI, int opNum) {
- printOperand(MI, opNum);
- MachineOperand::MachineOperandType OpTy = MI->getOperand(opNum+1).getType();
-
- if ((OpTy == MachineOperand::MO_VirtualRegister ||
- OpTy == MachineOperand::MO_MachineRegister) &&
- MI->getOperand(opNum+1).getReg() == V8::G0)
+void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &O, const char *Modifier) {
+ printOperand(MI, opNum, O);
+
+ // If this is an ADD operand, emit it like normal operands.
+ if (Modifier && !strcmp(Modifier, "arith")) {
+ O << ", ";
+ printOperand(MI, opNum+1, O);
+ return;
+ }
+
+ if (MI->getOperand(opNum+1).isReg() &&
+ MI->getOperand(opNum+1).getReg() == SP::G0)
return; // don't print "+%g0"
- if ((OpTy == MachineOperand::MO_SignExtendedImmed ||
- OpTy == MachineOperand::MO_UnextendedImmed) &&
- MI->getOperand(opNum+1).getImmedValue() == 0)
+ if (MI->getOperand(opNum+1).isImm() &&
+ MI->getOperand(opNum+1).getImm() == 0)
return; // don't print "+0"
-
+
O << "+";
- if (OpTy == MachineOperand::MO_GlobalAddress ||
- OpTy == MachineOperand::MO_ConstantPoolIndex) {
+ if (MI->getOperand(opNum+1).isGlobal() ||
+ MI->getOperand(opNum+1).isCPI()) {
O << "%lo(";
- printOperand(MI, opNum+1);
+ printOperand(MI, opNum+1, O);
O << ")";
} else {
- printOperand(MI, opNum+1);
+ printOperand(MI, opNum+1, O);
}
}
+bool SparcAsmPrinter::printGetPCX(const MachineInstr *MI, unsigned opNum,
+ raw_ostream &O) {
+ std::string operand = "";
+ const MachineOperand &MO = MI->getOperand(opNum);
+ switch (MO.getType()) {
+ default: llvm_unreachable("Operand is not a register");
+ case MachineOperand::MO_Register:
+ assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
+ "Operand is not a physical register ");
+ assert(MO.getReg() != SP::O7 &&
+ "%o7 is assigned as destination for getpcx!");
+ operand = "%" + StringRef(getRegisterName(MO.getReg())).lower();
+ break;
+ }
-bool SparcV8AsmPrinter::doInitialization(Module &M) {
- Mang = new Mangler(M);
- return false; // success
-}
+ unsigned mfNum = MI->getParent()->getParent()->getFunctionNumber();
+ unsigned bbNum = MI->getParent()->getNumber();
-bool SparcV8AsmPrinter::doFinalization(Module &M) {
- const TargetData &TD = TM.getTargetData();
+ O << '\n' << ".LLGETPCH" << mfNum << '_' << bbNum << ":\n";
+ O << "\tcall\t.LLGETPC" << mfNum << '_' << bbNum << '\n' ;
- // Print out module-level global variables here.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
- if (I->hasInitializer()) { // External global require no code
- O << "\n\n";
- std::string name = Mang->getValueName(I);
- Constant *C = I->getInitializer();
- unsigned Size = TD.getTypeSize(C->getType());
- unsigned Align = TD.getTypeAlignment(C->getType());
+ O << "\t sethi\t"
+ << "%hi(_GLOBAL_OFFSET_TABLE_+(.-.LLGETPCH" << mfNum << '_' << bbNum
+ << ")), " << operand << '\n' ;
- if (C->isNullValue() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
- I->hasWeakLinkage() /* FIXME: Verify correct */)) {
- SwitchSection(".data", I);
- if (I->hasInternalLinkage())
- O << "\t.local " << name << "\n";
+ O << ".LLGETPC" << mfNum << '_' << bbNum << ":\n" ;
+ O << "\tor\t" << operand
+ << ", %lo(_GLOBAL_OFFSET_TABLE_+(.-.LLGETPCH" << mfNum << '_' << bbNum
+ << ")), " << operand << '\n';
+ O << "\tadd\t" << operand << ", %o7, " << operand << '\n';
+
+ return true;
+}
- O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
- << "," << (unsigned)TD.getTypeAlignment(C->getType());
- O << "\t\t! ";
- WriteAsOperand(O, I, true, true, &M);
- O << "\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("", I);
- O << "\t.section\t\".llvm.linkonce.d." << name
- << "\",\"aw\",@progbits\n";
- break;
+void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
+ int CC = (int)MI->getOperand(opNum).getImm();
+ O << SPARCCondCodeToString((SPCC::CondCodes)CC);
+}
- 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 << "\t.globl " << name << "\n";
- // FALL THROUGH
- case GlobalValue::InternalLinkage:
- if (C->isNullValue())
- SwitchSection(".bss", I);
- else
- SwitchSection(".data", I);
- break;
- case GlobalValue::GhostLinkage:
- std::cerr << "Should not have any unmaterialized functions!\n";
- abort();
- }
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
- O << "\t.align " << Align << "\n";
- 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);
- }
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'r':
+ break;
}
+ }
+
+ printOperand(MI, OpNo, O);
+
+ return false;
+}
+
+bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier
+
+ O << '[';
+ printMemOperand(MI, OpNo, O);
+ O << ']';
+
+ return false;
+}
+
+/// isBlockOnlyReachableByFallthough - Return true if the basic block has
+/// exactly one predecessor and the control transfer mechanism between
+/// the predecessor and this block is a fall-through.
+///
+/// This overrides AsmPrinter's implementation to handle delay slots.
+bool SparcAsmPrinter::
+isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
+ // If this is a landing pad, it isn't a fall through. If it has no preds,
+ // then nothing falls through to it.
+ if (MBB->isLandingPad() || MBB->pred_empty())
+ return false;
+
+ // If there isn't exactly one predecessor, it can't be a fall through.
+ MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
+ ++PI2;
+ if (PI2 != MBB->pred_end())
+ return false;
+
+ // The predecessor has to be immediately before this block.
+ const MachineBasicBlock *Pred = *PI;
+
+ if (!Pred->isLayoutSuccessor(MBB))
+ return false;
+
+ // Check if the last terminator is an unconditional branch.
+ MachineBasicBlock::const_iterator I = Pred->end();
+ while (I != Pred->begin() && !(--I)->isTerminator())
+ ; // Noop
+ return I == Pred->end() || !I->isBarrier();
+}
+
+MachineLocation SparcAsmPrinter::
+getDebugValueLocation(const MachineInstr *MI) const {
+ assert(MI->getNumOperands() == 4 && "Invalid number of operands!");
+ assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm() &&
+ "Unexpected MachineOperand types");
+ return MachineLocation(MI->getOperand(0).getReg(),
+ MI->getOperand(1).getImm());
+}
- AsmPrinter::doFinalization(M);
- return false; // success
+// Force static initialization.
+extern "C" void LLVMInitializeSparcAsmPrinter() {
+ RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);
+ RegisterAsmPrinter<SparcAsmPrinter> Y(TheSparcV9Target);
}
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