//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "mips-asm-printer"
-
#include "Mips.h"
#include "MipsSubtarget.h"
#include "MipsInstrInfo.h"
#include "MipsTargetMachine.h"
#include "MipsMachineFunction.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/MachineFrameInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/MathExtras.h"
-#include <cctype>
-
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
-STATISTIC(EmittedInsts, "Number of machine instrs printed");
-
namespace {
- class VISIBILITY_HIDDEN MipsAsmPrinter : public AsmPrinter {
+ class MipsAsmPrinter : public AsmPrinter {
const MipsSubtarget *Subtarget;
public:
- explicit MipsAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
- const MCAsmInfo *T, bool V)
- : AsmPrinter(O, TM, T, V) {
+ explicit MipsAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : AsmPrinter(TM, Streamer) {
Subtarget = &TM.getSubtarget<MipsSubtarget>();
}
}
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant, const char *ExtraCode);
- void printOperand(const MachineInstr *MI, int opNum);
- void printUnsignedImm(const MachineInstr *MI, int opNum);
- void printMemOperand(const MachineInstr *MI, int opNum,
+ unsigned AsmVariant, const char *ExtraCode,
+ raw_ostream &O);
+ void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
+ void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
+ void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
const char *Modifier = 0);
- void printFCCOperand(const MachineInstr *MI, int opNum,
+ void printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
const char *Modifier = 0);
- void PrintGlobalVariable(const GlobalVariable *GVar);
- void printSavedRegsBitmask(MachineFunction &MF);
- void printHex32(unsigned int Value);
-
- const char *emitCurrentABIString();
- void emitFunctionStart(MachineFunction &MF);
- void emitFunctionEnd(MachineFunction &MF);
- void emitFrameDirective(MachineFunction &MF);
-
- void printInstruction(const MachineInstr *MI); // autogenerated.
+ void printSavedRegsBitmask(raw_ostream &O);
+ void printHex32(unsigned int Value, raw_ostream &O);
+
+ const char *getCurrentABIString() const;
+ void emitFrameDirective();
+
+ void printInstruction(const MachineInstr *MI, raw_ostream &O); // autogen'd.
+ void EmitInstruction(const MachineInstr *MI) {
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ printInstruction(MI, OS);
+ OutStreamer.EmitRawText(OS.str());
+ }
+ virtual void EmitFunctionBodyStart();
+ virtual void EmitFunctionBodyEnd();
static const char *getRegisterName(unsigned RegNo);
- bool runOnMachineFunction(MachineFunction &F);
+ virtual void EmitFunctionEntryLabel();
void EmitStartOfAsmFile(Module &M);
};
} // end of anonymous namespace
// Create a bitmask with all callee saved registers for CPU or Floating Point
// registers. For CPU registers consider RA, GP and FP for saving if necessary.
-void MipsAsmPrinter::
-printSavedRegsBitmask(MachineFunction &MF)
-{
+void MipsAsmPrinter::printSavedRegsBitmask(raw_ostream &O) {
const TargetRegisterInfo &RI = *TM.getRegisterInfo();
- MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
+ const MipsFunctionInfo *MipsFI = MF->getInfo<MipsFunctionInfo>();
// CPU and FPU Saved Registers Bitmasks
unsigned int CPUBitmask = 0;
unsigned int FPUBitmask = 0;
// Set the CPU and FPU Bitmasks
- MachineFrameInfo *MFI = MF.getFrameInfo();
+ const MachineFrameInfo *MFI = MF->getFrameInfo();
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
unsigned RegNum = MipsRegisterInfo::getRegisterNumbering(CSI[i].getReg());
}
// Return Address and Frame registers must also be set in CPUBitmask.
- if (RI.hasFP(MF))
+ if (RI.hasFP(*MF))
CPUBitmask |= (1 << MipsRegisterInfo::
- getRegisterNumbering(RI.getFrameRegister(MF)));
+ getRegisterNumbering(RI.getFrameRegister(*MF)));
- if (MF.getFrameInfo()->hasCalls())
+ if (MFI->adjustsStack())
CPUBitmask |= (1 << MipsRegisterInfo::
getRegisterNumbering(RI.getRARegister()));
// Print CPUBitmask
- O << "\t.mask \t"; printHex32(CPUBitmask); O << ','
- << MipsFI->getCPUTopSavedRegOff() << '\n';
+ O << "\t.mask \t"; printHex32(CPUBitmask, O);
+ O << ',' << MipsFI->getCPUTopSavedRegOff() << '\n';
// Print FPUBitmask
- O << "\t.fmask\t"; printHex32(FPUBitmask); O << ","
+ O << "\t.fmask\t"; printHex32(FPUBitmask, O); O << ","
<< MipsFI->getFPUTopSavedRegOff() << '\n';
}
// Print a 32 bit hex number with all numbers.
-void MipsAsmPrinter::
-printHex32(unsigned int Value)
-{
+void MipsAsmPrinter::printHex32(unsigned Value, raw_ostream &O) {
O << "0x";
for (int i = 7; i >= 0; i--)
- O << utohexstr( (Value & (0xF << (i*4))) >> (i*4) );
+ O << utohexstr((Value & (0xF << (i*4))) >> (i*4));
}
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
/// Frame Directive
-void MipsAsmPrinter::emitFrameDirective(MachineFunction &MF) {
+void MipsAsmPrinter::emitFrameDirective() {
const TargetRegisterInfo &RI = *TM.getRegisterInfo();
- unsigned stackReg = RI.getFrameRegister(MF);
+ unsigned stackReg = RI.getFrameRegister(*MF);
unsigned returnReg = RI.getRARegister();
- unsigned stackSize = MF.getFrameInfo()->getStackSize();
-
+ unsigned stackSize = MF->getFrameInfo()->getStackSize();
- O << "\t.frame\t" << '$' << LowercaseString(getRegisterName(stackReg))
- << ',' << stackSize << ','
- << '$' << LowercaseString(getRegisterName(returnReg))
- << '\n';
+ OutStreamer.EmitRawText("\t.frame\t$" +
+ Twine(LowercaseString(getRegisterName(stackReg))) +
+ "," + Twine(stackSize) + ",$" +
+ Twine(LowercaseString(getRegisterName(returnReg))));
}
/// Emit Set directives.
-const char *MipsAsmPrinter::emitCurrentABIString() {
- switch(Subtarget->getTargetABI()) {
- case MipsSubtarget::O32: return "abi32";
- case MipsSubtarget::O64: return "abiO64";
- case MipsSubtarget::N32: return "abiN32";
- case MipsSubtarget::N64: return "abi64";
- case MipsSubtarget::EABI: return "eabi32"; // TODO: handle eabi64
- default: break;
+const char *MipsAsmPrinter::getCurrentABIString() const {
+ switch (Subtarget->getTargetABI()) {
+ case MipsSubtarget::O32: return "abi32";
+ case MipsSubtarget::O64: return "abiO64";
+ case MipsSubtarget::N32: return "abiN32";
+ case MipsSubtarget::N64: return "abi64";
+ case MipsSubtarget::EABI: return "eabi32"; // TODO: handle eabi64
+ default: break;
}
llvm_unreachable("Unknown Mips ABI");
return NULL;
}
-/// Emit the directives used by GAS on the start of functions
-void MipsAsmPrinter::emitFunctionStart(MachineFunction &MF) {
- // Print out the label for the function.
- const Function *F = MF.getFunction();
- OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
-
- // 2 bits aligned
- EmitAlignment(MF.getAlignment(), F);
-
- O << "\t.globl\t" << CurrentFnName << '\n';
- O << "\t.ent\t" << CurrentFnName << '\n';
-
- printVisibility(CurrentFnName, F->getVisibility());
-
- if ((MAI->hasDotTypeDotSizeDirective()) && Subtarget->isLinux())
- O << "\t.type\t" << CurrentFnName << ", @function\n";
-
- O << CurrentFnName << ":\n";
-
- emitFrameDirective(MF);
- printSavedRegsBitmask(MF);
+void MipsAsmPrinter::EmitFunctionEntryLabel() {
+ OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
+ OutStreamer.EmitLabel(CurrentFnSym);
+}
- O << '\n';
+/// EmitFunctionBodyStart - Targets can override this to emit stuff before
+/// the first basic block in the function.
+void MipsAsmPrinter::EmitFunctionBodyStart() {
+ emitFrameDirective();
+
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ printSavedRegsBitmask(OS);
+ OutStreamer.EmitRawText(OS.str());
}
-/// Emit the directives used by GAS on the end of functions
-void MipsAsmPrinter::emitFunctionEnd(MachineFunction &MF) {
+/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
+/// the last basic block in the function.
+void MipsAsmPrinter::EmitFunctionBodyEnd() {
// There are instruction for this macros, but they must
// always be at the function end, and we can't emit and
// break with BB logic.
- O << "\t.set\tmacro\n";
- O << "\t.set\treorder\n";
-
- O << "\t.end\t" << CurrentFnName << '\n';
- if (MAI->hasDotTypeDotSizeDirective() && !Subtarget->isLinux())
- O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
+ OutStreamer.EmitRawText(StringRef("\t.set\tmacro"));
+ OutStreamer.EmitRawText(StringRef("\t.set\treorder"));
+ OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
}
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-bool MipsAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- this->MF = &MF;
-
- SetupMachineFunction(MF);
-
- // Print out constants referenced by the function
- EmitConstantPool(MF.getConstantPool());
-
- // Print out jump tables referenced by the function
- EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
-
- O << "\n\n";
-
- // Emit the function start directives
- emitFunctionStart(MF);
-
- // 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()) {
- EmitBasicBlockStart(I);
- }
-
- for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
- II != E; ++II) {
- processDebugLoc(II, true);
-
- // Print the assembly for the instruction.
- printInstruction(II);
-
- if (VerboseAsm && !II->getDebugLoc().isUnknown())
- EmitComments(*II);
- O << '\n';
-
- processDebugLoc(II, false);
- ++EmittedInsts;
- }
-
- // Each Basic Block is separated by a newline
- O << '\n';
- }
-
- // Emit function end directives
- emitFunctionEnd(MF);
-
- // We didn't modify anything.
- return false;
-}
// Print out an operand for an inline asm expression.
bool MipsAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant,const char *ExtraCode){
+ unsigned AsmVariant,const char *ExtraCode,
+ raw_ostream &O) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
- printOperand(MI, OpNo);
+ printOperand(MI, OpNo, O);
return false;
}
-void MipsAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+void MipsAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(opNum);
bool closeP = false;
break;
case MachineOperand::MO_MachineBasicBlock:
- GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
+ O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_GlobalAddress:
- O << Mang->getMangledName(MO.getGlobal());
+ O << *Mang->getSymbol(MO.getGlobal());
break;
case MachineOperand::MO_ExternalSymbol:
- O << MO.getSymbolName();
+ O << *GetExternalSymbolSymbol(MO.getSymbolName());
break;
case MachineOperand::MO_JumpTableIndex:
O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << MO.getIndex();
+ << '_' << MO.getIndex();
break;
case MachineOperand::MO_ConstantPoolIndex:
O << MAI->getPrivateGlobalPrefix() << "CPI"
<< getFunctionNumber() << "_" << MO.getIndex();
+ if (MO.getOffset())
+ O << "+" << MO.getOffset();
break;
default:
if (closeP) O << ")";
}
-void MipsAsmPrinter::printUnsignedImm(const MachineInstr *MI, int opNum) {
+void MipsAsmPrinter::printUnsignedImm(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(opNum);
- if (MO.getType() == MachineOperand::MO_Immediate)
+ if (MO.isImm())
O << (unsigned short int)MO.getImm();
else
- printOperand(MI, opNum);
+ printOperand(MI, opNum, O);
}
void MipsAsmPrinter::
-printMemOperand(const MachineInstr *MI, int opNum, const char *Modifier) {
+printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
+ const char *Modifier) {
// when using stack locations for not load/store instructions
// print the same way as all normal 3 operand instructions.
if (Modifier && !strcmp(Modifier, "stackloc")) {
- printOperand(MI, opNum+1);
+ printOperand(MI, opNum+1, O);
O << ", ";
- printOperand(MI, opNum);
+ printOperand(MI, opNum, O);
return;
}
// Load/Store memory operands -- imm($reg)
// If PIC target the target is loaded as the
// pattern lw $25,%call16($28)
- printOperand(MI, opNum);
+ printOperand(MI, opNum, O);
O << "(";
- printOperand(MI, opNum+1);
+ printOperand(MI, opNum+1, O);
O << ")";
}
void MipsAsmPrinter::
-printFCCOperand(const MachineInstr *MI, int opNum, const char *Modifier) {
+printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
+ const char *Modifier) {
const MachineOperand& MO = MI->getOperand(opNum);
O << Mips::MipsFCCToString((Mips::CondCode)MO.getImm());
}
// FIXME: Use SwitchSection.
// Tell the assembler which ABI we are using
- O << "\t.section .mdebug." << emitCurrentABIString() << '\n';
+ OutStreamer.EmitRawText("\t.section .mdebug." + Twine(getCurrentABIString()));
// TODO: handle O64 ABI
- if (Subtarget->isABI_EABI())
- O << "\t.section .gcc_compiled_long" <<
- (Subtarget->isGP32bit() ? "32" : "64") << '\n';
-
- // return to previous section
- O << "\t.previous" << '\n';
-}
-
-void MipsAsmPrinter::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();
- const Type *CTy = C->getType();
- unsigned Size = TD->getTypeAllocSize(CTy);
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
- bool printSizeAndType = true;
-
- // A data structure or array is aligned in memory to the largest
- // alignment boundary required by any data type inside it (this matches
- // the Preferred Type Alignment). For integral types, the alignment is
- // the type size.
- unsigned Align;
- if (CTy->getTypeID() == Type::IntegerTyID ||
- CTy->getTypeID() == Type::VoidTyID) {
- assert(!(Size & (Size-1)) && "Alignment is not a power of two!");
- Align = Log2_32(Size);
- } else
- Align = TD->getPreferredTypeAlignmentShift(CTy);
-
- printVisibility(name, GVar->getVisibility());
-
- OutStreamer.SwitchSection(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\t" << name << '\n';
-
- O << MAI->getCOMMDirective() << name << ',' << Size;
- if (MAI->getCOMMDirectiveTakesAlignment())
- O << ',' << (1 << Align);
-
- O << '\n';
- return;
- }
- }
- switch (GVar->getLinkage()) {
- case GlobalValue::LinkOnceAnyLinkage:
- case GlobalValue::LinkOnceODRLinkage:
- case GlobalValue::CommonLinkage:
- case GlobalValue::WeakAnyLinkage:
- 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 << MAI->getGlobalDirective() << name << '\n';
- // Fall Through
- case GlobalValue::PrivateLinkage:
- case GlobalValue::LinkerPrivateLinkage:
- case GlobalValue::InternalLinkage:
- if (CVA && CVA->isCString())
- printSizeAndType = false;
- 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 (MAI->hasDotTypeDotSizeDirective() && printSizeAndType) {
- O << "\t.type " << name << ",@object\n";
- O << "\t.size " << name << ',' << Size << '\n';
+ if (Subtarget->isABI_EABI()) {
+ if (Subtarget->isGP32bit())
+ OutStreamer.EmitRawText(StringRef("\t.section .gcc_compiled_long32"));
+ else
+ OutStreamer.EmitRawText(StringRef("\t.section .gcc_compiled_long64"));
}
- O << name << ":\n";
- EmitGlobalConstant(C);
+ // return to previous section
+ OutStreamer.EmitRawText(StringRef("\t.previous"));
}
-
// Force static initialization.
extern "C" void LLVMInitializeMipsAsmPrinter() {
RegisterAsmPrinter<MipsAsmPrinter> X(TheMipsTarget);
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