//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "mips-asm-printer"
-#include "MipsAsmPrinter.h"
-#include "Mips.h"
-#include "MipsInstrInfo.h"
#include "InstPrinter/MipsInstPrinter.h"
#include "MCTargetDesc/MipsBaseInfo.h"
+#include "Mips.h"
+#include "MipsAsmPrinter.h"
+#include "MipsInstrInfo.h"
+#include "MipsMCInstLower.h"
+#include "MipsTargetStreamer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
-#include "llvm/Analysis/DebugInfo.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/Instructions.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineMemOperand.h"
-#include "llvm/Instructions.h"
-#include "llvm/MC/MCStreamer.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCELFStreamer.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ELF.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
+MipsTargetStreamer &MipsAsmPrinter::getTargetStreamer() {
+ return static_cast<MipsTargetStreamer &>(*OutStreamer.getTargetStreamer());
+}
+
bool MipsAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ // Initialize TargetLoweringObjectFile.
+ if (Subtarget->allowMixed16_32())
+ const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
+ .Initialize(OutContext, TM);
MipsFI = MF.getInfo<MipsFunctionInfo>();
+ MCP = MF.getConstantPool();
AsmPrinter::runOnMachineFunction(MF);
return true;
}
+bool MipsAsmPrinter::lowerOperand(const MachineOperand &MO, MCOperand &MCOp) {
+ MCOp = MCInstLowering.LowerOperand(MO);
+ return MCOp.isValid();
+}
+
+#include "MipsGenMCPseudoLowering.inc"
+
void MipsAsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (MI->isDebugValue()) {
SmallString<128> Str;
return;
}
+ // If we just ended a constant pool, mark it as such.
+ if (InConstantPool && MI->getOpcode() != Mips::CONSTPOOL_ENTRY) {
+ OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
+ InConstantPool = false;
+ }
+ if (MI->getOpcode() == Mips::CONSTPOOL_ENTRY) {
+ // CONSTPOOL_ENTRY - This instruction represents a floating
+ //constant pool in the function. The first operand is the ID#
+ // for this instruction, the second is the index into the
+ // MachineConstantPool that this is, the third is the size in
+ // bytes of this constant pool entry.
+ // The required alignment is specified on the basic block holding this MI.
+ //
+ unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
+ unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
+
+ // If this is the first entry of the pool, mark it.
+ if (!InConstantPool) {
+ OutStreamer.EmitDataRegion(MCDR_DataRegion);
+ InConstantPool = true;
+ }
+
+ OutStreamer.EmitLabel(GetCPISymbol(LabelId));
+
+ const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
+ if (MCPE.isMachineConstantPoolEntry())
+ EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
+ else
+ EmitGlobalConstant(MCPE.Val.ConstVal);
+ return;
+ }
+
+
MachineBasicBlock::const_instr_iterator I = MI;
MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
do {
+ // Do any auto-generated pseudo lowerings.
+ if (emitPseudoExpansionLowering(OutStreamer, &*I))
+ continue;
+
+ // The inMips16Mode() test is not permanent.
+ // Some instructions are marked as pseudo right now which
+ // would make the test fail for the wrong reason but
+ // that will be fixed soon. We need this here because we are
+ // removing another test for this situation downstream in the
+ // callchain.
+ //
+ if (I->isPseudo() && !Subtarget->inMips16Mode())
+ llvm_unreachable("Pseudo opcode found in EmitInstruction()");
+
MCInst TmpInst0;
- MCInstLowering.Lower(I++, TmpInst0);
+ MCInstLowering.Lower(I, TmpInst0);
OutStreamer.EmitInstruction(TmpInst0);
- } while ((I != E) && I->isInsideBundle());
+ } while ((++I != E) && I->isInsideBundle()); // Delay slot check
}
//===----------------------------------------------------------------------===//
const MachineFrameInfo *MFI = MF->getFrameInfo();
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
// size of stack area to which FP callee-saved regs are saved.
- unsigned CPURegSize = Mips::CPURegsRegClass.getSize();
+ unsigned CPURegSize = Mips::GPR32RegClass.getSize();
unsigned FGR32RegSize = Mips::FGR32RegClass.getSize();
unsigned AFGR64RegSize = Mips::AFGR64RegClass.getSize();
bool HasAFGR64Reg = false;
// Set FPU Bitmask.
for (i = 0; i != e; ++i) {
unsigned Reg = CSI[i].getReg();
- if (Mips::CPURegsRegClass.contains(Reg))
+ if (Mips::GPR32RegClass.contains(Reg))
break;
- unsigned RegNum = getMipsRegisterNumbering(Reg);
+ unsigned RegNum = TM.getRegisterInfo()->getEncodingValue(Reg);
if (Mips::AFGR64RegClass.contains(Reg)) {
FPUBitmask |= (3 << RegNum);
CSFPRegsSize += AFGR64RegSize;
// Set CPU Bitmask.
for (; i != e; ++i) {
unsigned Reg = CSI[i].getReg();
- unsigned RegNum = getMipsRegisterNumbering(Reg);
+ unsigned RegNum = TM.getRegisterInfo()->getEncodingValue(Reg);
CPUBitmask |= (1 << RegNum);
}
case MipsSubtarget::N32: return "abiN32";
case MipsSubtarget::N64: return "abi64";
case MipsSubtarget::EABI: return "eabi32"; // TODO: handle eabi64
- default: llvm_unreachable("Unknown Mips ABI");;
+ default: llvm_unreachable("Unknown Mips ABI");
}
}
void MipsAsmPrinter::EmitFunctionEntryLabel() {
+ if (Subtarget->inMicroMipsMode())
+ getTargetStreamer().emitDirectiveSetMicroMips();
+
if (OutStreamer.hasRawTextSupport()) {
if (Subtarget->inMips16Mode())
OutStreamer.EmitRawText(StringRef("\t.set\tmips16"));
// OutStreamer.EmitRawText(StringRef("\t.set\tnomicromips"));
OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
}
+
OutStreamer.EmitLabel(CurrentFnSym);
}
/// EmitFunctionBodyStart - Targets can override this to emit stuff before
/// the first basic block in the function.
void MipsAsmPrinter::EmitFunctionBodyStart() {
- MCInstLowering.Initialize(Mang, &MF->getContext());
+ MCInstLowering.Initialize(&MF->getContext());
- emitFrameDirective();
+ bool IsNakedFunction =
+ MF->getFunction()->
+ getAttributes().hasAttribute(AttributeSet::FunctionIndex,
+ Attribute::Naked);
+ if (!IsNakedFunction)
+ emitFrameDirective();
if (OutStreamer.hasRawTextSupport()) {
SmallString<128> Str;
raw_svector_ostream OS(Str);
- printSavedRegsBitmask(OS);
+ if (!IsNakedFunction)
+ printSavedRegsBitmask(OS);
OutStreamer.EmitRawText(OS.str());
-
- OutStreamer.EmitRawText(StringRef("\t.set\tnoreorder"));
- OutStreamer.EmitRawText(StringRef("\t.set\tnomacro"));
- if (MipsFI->getEmitNOAT())
+ if (!Subtarget->inMips16Mode()) {
+ OutStreamer.EmitRawText(StringRef("\t.set\tnoreorder"));
+ OutStreamer.EmitRawText(StringRef("\t.set\tnomacro"));
OutStreamer.EmitRawText(StringRef("\t.set\tnoat"));
- }
-
- if ((MF->getTarget().getRelocationModel() == Reloc::PIC_) &&
- Subtarget->isABI_O32() && MipsFI->globalBaseRegSet()) {
- SmallVector<MCInst, 4> MCInsts;
- MCInstLowering.LowerSETGP01(MCInsts);
- for (SmallVector<MCInst, 4>::iterator I = MCInsts.begin();
- I != MCInsts.end(); ++I)
- OutStreamer.EmitInstruction(*I);
+ }
}
}
// always be at the function end, and we can't emit and
// break with BB logic.
if (OutStreamer.hasRawTextSupport()) {
- if (MipsFI->getEmitNOAT())
+ if (!Subtarget->inMips16Mode()) {
OutStreamer.EmitRawText(StringRef("\t.set\tat"));
-
- OutStreamer.EmitRawText(StringRef("\t.set\tmacro"));
- OutStreamer.EmitRawText(StringRef("\t.set\treorder"));
+ OutStreamer.EmitRawText(StringRef("\t.set\tmacro"));
+ OutStreamer.EmitRawText(StringRef("\t.set\treorder"));
+ }
OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
}
+ // Make sure to terminate any constant pools that were at the end
+ // of the function.
+ if (!InConstantPool)
+ return;
+ InConstantPool = false;
+ OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
}
/// isBlockOnlyReachableByFallthough - Return true if the basic block has
const MachineOperand &MO = MI->getOperand(OpNum);
switch (ExtraCode[0]) {
default:
- return true; // Unknown modifier.
+ // See if this is a generic print operand
+ return AsmPrinter::PrintAsmOperand(MI,OpNum,AsmVariant,ExtraCode,O);
case 'X': // hex const int
if ((MO.getType()) != MachineOperand::MO_Immediate)
return true;
return true;
O << MO.getImm() - 1;
return false;
+ case 'z': {
+ // $0 if zero, regular printing otherwise
+ if (MO.getType() != MachineOperand::MO_Immediate)
+ return true;
+ int64_t Val = MO.getImm();
+ if (Val)
+ O << Val;
+ else
+ O << "$0";
+ return false;
+ }
+ case 'D': // Second part of a double word register operand
+ case 'L': // Low order register of a double word register operand
+ case 'M': // High order register of a double word register operand
+ {
+ if (OpNum == 0)
+ return true;
+ const MachineOperand &FlagsOP = MI->getOperand(OpNum - 1);
+ if (!FlagsOP.isImm())
+ return true;
+ unsigned Flags = FlagsOP.getImm();
+ unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
+ // Number of registers represented by this operand. We are looking
+ // for 2 for 32 bit mode and 1 for 64 bit mode.
+ if (NumVals != 2) {
+ if (Subtarget->isGP64bit() && NumVals == 1 && MO.isReg()) {
+ unsigned Reg = MO.getReg();
+ O << '$' << MipsInstPrinter::getRegisterName(Reg);
+ return false;
+ }
+ return true;
+ }
+
+ unsigned RegOp = OpNum;
+ if (!Subtarget->isGP64bit()){
+ // Endianess reverses which register holds the high or low value
+ // between M and L.
+ switch(ExtraCode[0]) {
+ case 'M':
+ RegOp = (Subtarget->isLittle()) ? OpNum + 1 : OpNum;
+ break;
+ case 'L':
+ RegOp = (Subtarget->isLittle()) ? OpNum : OpNum + 1;
+ break;
+ case 'D': // Always the second part
+ RegOp = OpNum + 1;
+ }
+ if (RegOp >= MI->getNumOperands())
+ return true;
+ const MachineOperand &MO = MI->getOperand(RegOp);
+ if (!MO.isReg())
+ return true;
+ unsigned Reg = MO.getReg();
+ O << '$' << MipsInstPrinter::getRegisterName(Reg);
+ return false;
+ }
+ }
+ case 'w':
+ // Print MSA registers for the 'f' constraint
+ // In LLVM, the 'w' modifier doesn't need to do anything.
+ // We can just call printOperand as normal.
+ break;
}
}
unsigned OpNum, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
- if (ExtraCode && ExtraCode[0])
- return true; // Unknown modifier.
+ int Offset = 0;
+ // Currently we are expecting either no ExtraCode or 'D'
+ if (ExtraCode) {
+ if (ExtraCode[0] == 'D')
+ Offset = 4;
+ else
+ return true; // Unknown modifier.
+ }
const MachineOperand &MO = MI->getOperand(OpNum);
assert(MO.isReg() && "unexpected inline asm memory operand");
- O << "0($" << MipsInstPrinter::getRegisterName(MO.getReg()) << ")";
+ O << Offset << "($" << MipsInstPrinter::getRegisterName(MO.getReg()) << ")";
+
return false;
}
void MipsAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
raw_ostream &O) {
+ const DataLayout *DL = TM.getDataLayout();
const MachineOperand &MO = MI->getOperand(opNum);
bool closeP = false;
return;
case MachineOperand::MO_GlobalAddress:
- O << *Mang->getSymbol(MO.getGlobal());
+ O << *getSymbol(MO.getGlobal());
break;
case MachineOperand::MO_BlockAddress: {
- MCSymbol* BA = GetBlockAddressSymbol(MO.getBlockAddress());
+ MCSymbol *BA = GetBlockAddressSymbol(MO.getBlockAddress());
O << BA->getName();
break;
}
- case MachineOperand::MO_ExternalSymbol:
- O << *GetExternalSymbolSymbol(MO.getSymbolName());
- break;
-
- case MachineOperand::MO_JumpTableIndex:
- O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << MO.getIndex();
- break;
-
case MachineOperand::MO_ConstantPoolIndex:
- O << MAI->getPrivateGlobalPrefix() << "CPI"
+ O << DL->getPrivateGlobalPrefix() << "CPI"
<< getFunctionNumber() << "_" << MO.getIndex();
if (MO.getOffset())
O << "+" << MO.getOffset();
printOperand(MI, opNum, O);
}
+void MipsAsmPrinter::printUnsignedImm8(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.isImm())
+ O << (unsigned short int)(unsigned char)MO.getImm();
+ else
+ printOperand(MI, opNum, O);
+}
+
void MipsAsmPrinter::
printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O) {
// Load/Store memory operands -- imm($reg)
void MipsAsmPrinter::
printFCCOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
const char *Modifier) {
- const MachineOperand& MO = MI->getOperand(opNum);
+ const MachineOperand &MO = MI->getOperand(opNum);
O << Mips::MipsFCCToString((Mips::CondCode)MO.getImm());
}
void MipsAsmPrinter::EmitStartOfAsmFile(Module &M) {
// FIXME: Use SwitchSection.
+ // TODO: Need to add -mabicalls and -mno-abicalls flags.
+ // Currently we assume that -mabicalls is the default.
+ getTargetStreamer().emitDirectiveAbiCalls();
+ Reloc::Model RM = Subtarget->getRelocationModel();
+ if (RM == Reloc::Static && !Subtarget->hasMips64())
+ getTargetStreamer().emitDirectiveOptionPic0();
+
// Tell the assembler which ABI we are using
if (OutStreamer.hasRawTextSupport())
OutStreamer.EmitRawText("\t.section .mdebug." +
// return to previous section
if (OutStreamer.hasRawTextSupport())
OutStreamer.EmitRawText(StringRef("\t.previous"));
+
+}
+
+static void emitELFHeaderFlagsCG(MipsTargetStreamer &TargetStreamer,
+ const MipsSubtarget &Subtarget) {
+ // Update e_header flags
+ unsigned EFlags = 0;
+
+ // TODO: Need to add -mabicalls and -mno-abicalls flags.
+ // Currently we assume that -mabicalls is the default.
+ EFlags |= ELF::EF_MIPS_CPIC;
+
+ if (Subtarget.inMips16Mode())
+ EFlags |= ELF::EF_MIPS_ARCH_ASE_M16;
+ else
+ EFlags |= ELF::EF_MIPS_NOREORDER;
+
+ // Architecture
+ if (Subtarget.hasMips64r2())
+ EFlags |= ELF::EF_MIPS_ARCH_64R2;
+ else if (Subtarget.hasMips64())
+ EFlags |= ELF::EF_MIPS_ARCH_64;
+ else if (Subtarget.hasMips32r2())
+ EFlags |= ELF::EF_MIPS_ARCH_32R2;
+ else
+ EFlags |= ELF::EF_MIPS_ARCH_32;
+
+ if (Subtarget.inMicroMipsMode())
+ EFlags |= ELF::EF_MIPS_MICROMIPS;
+
+ // ABI
+ if (Subtarget.isABI_O32())
+ EFlags |= ELF::EF_MIPS_ABI_O32;
+
+ // Relocation Model
+ Reloc::Model RM = Subtarget.getRelocationModel();
+ if (RM == Reloc::PIC_ || RM == Reloc::Default)
+ EFlags |= ELF::EF_MIPS_PIC;
+ else if (RM == Reloc::Static)
+ ; // Do nothing for Reloc::Static
+ else
+ llvm_unreachable("Unsupported relocation model for e_flags");
+
+ TargetStreamer.emitMipsHackELFFlags(EFlags);
}
-MachineLocation
-MipsAsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
- // Handles frame addresses emitted in MipsInstrInfo::emitFrameIndexDebugValue.
- assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
- assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm() &&
- "Unexpected MachineOperand types");
- return MachineLocation(MI->getOperand(0).getReg(),
- MI->getOperand(1).getImm());
+void MipsAsmPrinter::EmitEndOfAsmFile(Module &M) {
+ // Emit Mips ELF register info
+ Subtarget->getMReginfo().emitMipsReginfoSectionCG(
+ OutStreamer, getObjFileLowering(), *Subtarget);
+ emitELFHeaderFlagsCG(getTargetStreamer(), *Subtarget);
}
void MipsAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
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