#include "X86IntelAsmPrinter.h"
#include "X86.h"
+#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
+X86IntelAsmPrinter::X86IntelAsmPrinter(std::ostream &O, X86TargetMachine &TM)
+ : X86SharedAsmPrinter(O, TM) {
+}
+
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
///
bool X86IntelAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- if (forDarwin) {
- // Let PassManager know we need debug information and relay
- // the MachineDebugInfo address on to DwarfWriter.
- DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
- }
-
SetupMachineFunction(MF);
O << "\n\n";
EmitConstantPool(MF.getConstantPool());
// Print out labels for the function.
- SwitchSection("\t.text\n", MF.getFunction());
+ SwitchToTextSection("_text", MF.getFunction());
EmitAlignment(4);
- O << "\t.globl\t" << CurrentFnName << "\n";
- if (HasDotTypeDotSizeDirective)
- O << "\t.type\t" << CurrentFnName << ", @function\n";
- O << CurrentFnName << ":\n";
+ if (MF.getFunction()->getLinkage() == GlobalValue::ExternalLinkage)
+ O << "\tpublic " << CurrentFnName << "\n";
+ O << CurrentFnName << "\tproc near\n";
- if (forDarwin) {
- // Emit pre-function debug information.
- DW.BeginFunction(&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 there are any predecessors.
- if (I->pred_begin() != I->pred_end())
- O << PrivateGlobalPrefix << "BB" << CurrentFnName << "_" << I->getNumber()
- << ":\t"
- << CommentString << " " << I->getBasicBlock()->getName() << "\n";
+ if (I->pred_begin() != I->pred_end()) {
+ printBasicBlockLabel(I, true);
+ O << '\n';
+ }
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
}
}
- if (forDarwin) {
- // Emit post-function debug information.
- DW.EndFunction();
- }
+ O << CurrentFnName << "\tendp\n";
// We didn't modify anything.
return false;
const char *Modifier) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- if (Value *V = MO.getVRegValueOrNull()) {
- O << "<" << V->getName() << ">";
- return;
- }
- // FALLTHROUGH
- case MachineOperand::MO_MachineRegister:
- if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
- // Bug Workaround: See note in Printer::doInitialization about %.
- O << "%" << RI.get(MO.getReg()).Name;
- else
- O << "%reg" << MO.getReg();
+ case MachineOperand::MO_Register:
+ if (MRegisterInfo::isPhysicalRegister(MO.getReg())) {
+ unsigned Reg = MO.getReg();
+ if (Modifier && strncmp(Modifier, "trunc", strlen("trunc")) == 0) {
+ MVT::ValueType VT = (strcmp(Modifier,"trunc16") == 0)
+ ? MVT::i16 : MVT::i8;
+ Reg = getX86SubSuperRegister(Reg, VT);
+ }
+ O << RI.get(Reg).Name;
+ } else
+ O << "reg" << MO.getReg();
return;
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
+ case MachineOperand::MO_Immediate:
O << (int)MO.getImmedValue();
return;
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << PrivateGlobalPrefix << "BB"
- << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber () << "\t# "
- << MBBOp->getBasicBlock ()->getName ();
- return;
- }
- case MachineOperand::MO_PCRelativeDisp:
- assert(0 && "Shouldn't use addPCDisp() when building X86 MachineInstrs");
- abort ();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
return;
case MachineOperand::MO_ConstantPoolIndex: {
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
if (!isMemOp) O << "OFFSET ";
O << "[" << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
<< MO.getConstantPoolIndex();
- if (forDarwin && TM.getRelocationModel() == Reloc::PIC)
- O << "-\"L" << getFunctionNumber() << "$pb\"";
int Offset = MO.getOffset();
if (Offset > 0)
O << " + " << Offset;
bool isCallOp = Modifier && !strcmp(Modifier, "call");
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
if (!isMemOp && !isCallOp) O << "OFFSET ";
- if (forDarwin && TM.getRelocationModel() != Reloc::Static) {
- GlobalValue *GV = MO.getGlobal();
- std::string Name = Mang->getValueName(GV);
- if (!isMemOp && !isCallOp) O << '$';
- // Link-once, External, or Weakly-linked global variables need
- // non-lazily-resolved stubs
- if (GV->isExternal() || GV->hasWeakLinkage() ||
- GV->hasLinkOnceLinkage()) {
- // Dynamically-resolved functions need a stub for the function.
- if (isCallOp && isa<Function>(GV) && cast<Function>(GV)->isExternal()) {
- FnStubs.insert(Name);
- O << "L" << Name << "$stub";
- } else {
- GVStubs.insert(Name);
- O << "L" << Name << "$non_lazy_ptr";
- }
- } else {
- O << Mang->getValueName(GV);
- }
- if (!isCallOp && TM.getRelocationModel() == Reloc::PIC)
- O << "-\"L" << getFunctionNumber() << "$pb\"";
- } else
- O << Mang->getValueName(MO.getGlobal());
+ O << Mang->getValueName(MO.getGlobal());
int Offset = MO.getOffset();
if (Offset > 0)
O << " + " << Offset;
}
case MachineOperand::MO_ExternalSymbol: {
bool isCallOp = Modifier && !strcmp(Modifier, "call");
- if (isCallOp && forDarwin && TM.getRelocationModel() != Reloc::Static) {
- std::string Name(GlobalPrefix);
- Name += MO.getSymbolName();
- FnStubs.insert(Name);
- O << "L" << Name << "$stub";
- return;
- }
if (!isCallOp) O << "OFFSET ";
O << GlobalPrefix << MO.getSymbolName();
return;
O << "\"L" << getFunctionNumber() << "$pb\":";
}
+bool X86IntelAsmPrinter::printAsmMRegister(const MachineOperand &MO,
+ const char Mode) {
+ const MRegisterInfo &RI = *TM.getRegisterInfo();
+ unsigned Reg = MO.getReg();
+ switch (Mode) {
+ default: return true; // Unknown mode.
+ case 'b': // Print QImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i8);
+ break;
+ case 'h': // Print QImode high register
+ Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
+ break;
+ case 'w': // Print HImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i16);
+ break;
+ case 'k': // Print SImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i32);
+ break;
+ }
+
+ O << '%' << RI.get(Reg).Name;
+ return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool X86IntelAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
+ }
+ }
+
+ printOperand(MI, OpNo);
+ return false;
+}
+
+bool X86IntelAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+ printMemReference(MI, OpNo);
+ return false;
+}
+
/// printMachineInstruction -- Print out a single X86 LLVM instruction
/// MI in Intel syntax to the current output stream.
///
void X86IntelAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
+ // See if a truncate instruction can be turned into a nop.
+ switch (MI->getOpcode()) {
+ default: break;
+ case X86::TRUNC_R32_R16:
+ case X86::TRUNC_R32_R8:
+ case X86::TRUNC_R16_R8: {
+ const MachineOperand &MO0 = MI->getOperand(0);
+ const MachineOperand &MO1 = MI->getOperand(1);
+ unsigned Reg0 = MO0.getReg();
+ unsigned Reg1 = MO1.getReg();
+ if (MI->getOpcode() == X86::TRUNC_R32_R16)
+ Reg1 = getX86SubSuperRegister(Reg1, MVT::i16);
+ else
+ Reg1 = getX86SubSuperRegister(Reg1, MVT::i8);
+ O << CommentString << " TRUNCATE ";
+ if (Reg0 != Reg1)
+ O << "\n\t";
+ break;
+ }
+ }
+
// Call the autogenerated instruction printer routines.
printInstruction(MI);
}
bool X86IntelAsmPrinter::doInitialization(Module &M) {
+ MLSections = true;
+ GlobalPrefix = "_";
+ CommentString = ";";
+
X86SharedAsmPrinter::doInitialization(M);
- // Tell gas we are outputting Intel syntax (not AT&T syntax) assembly.
- //
- // Bug: gas in `intel_syntax noprefix' mode interprets the symbol `Sp' in an
- // instruction as a reference to the register named sp, and if you try to
- // reference a symbol `Sp' (e.g. `mov ECX, OFFSET Sp') then it gets lowercased
- // before being looked up in the symbol table. This creates spurious
- // `undefined symbol' errors when linking. Workaround: Do not use `noprefix'
- // mode, and decorate all register names with percent signs.
- O << "\t.intel_syntax\n";
+
+ PrivateGlobalPrefix = "$";
+ AlignDirective = "\talign\t";
+ ZeroDirective = "\tdb\t";
+ ZeroDirectiveSuffix = " dup(0)";
+ AsciiDirective = "\tdb\t";
+ AscizDirective = 0;
+ Data8bitsDirective = "\tdb\t";
+ Data16bitsDirective = "\tdw\t";
+ Data32bitsDirective = "\tdd\t";
+ Data64bitsDirective = "\tdq\t";
+ HasDotTypeDotSizeDirective = false;
+ Mang->markCharUnacceptable('.');
+
+ DefaultTextSection = "_text";
+ DefaultDataSection = "_data";
+ SwitchToSectionDirective = "";
+
+ O << "\t.686\n\t.model flat\n\n";
+
+ // Emit declarations for external functions.
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (I->isExternal())
+ O << "\textern " << Mang->getValueName(I) << ":near\n";
+
+ // Emit declarations for external globals. Note that VC++ always declares
+ // external globals to have type byte, and if that's good enough for VC++...
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I) {
+ if (I->isExternal())
+ O << "\textern " << Mang->getValueName(I) << ":byte\n";
+ }
+
return false;
}
+bool X86IntelAsmPrinter::doFinalization(Module &M) {
+ const TargetData *TD = TM.getTargetData();
+
+ // 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->isExternal()) continue; // 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;
+
+ std::string name = Mang->getValueName(I);
+ Constant *C = I->getInitializer();
+ unsigned Size = TD->getTypeSize(C->getType());
+ unsigned Align = getPreferredAlignmentLog(I);
+ bool bCustomSegment = false;
+
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ SwitchToDataSection("", 0);
+ O << name << "?\tsegment common 'COMMON'\n";
+ bCustomSegment = true;
+ // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
+ // are also available.
+ break;
+ case GlobalValue::AppendingLinkage:
+ SwitchToDataSection("", 0);
+ O << name << "?\tsegment public 'DATA'\n";
+ bCustomSegment = true;
+ // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
+ // are also available.
+ break;
+ case GlobalValue::ExternalLinkage:
+ O << "\tpublic " << name << "\n";
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ SwitchToDataSection(DefaultDataSection, I);
+ break;
+ default:
+ assert(0 && "Unknown linkage type!");
+ }
+
+ if (!bCustomSegment)
+ EmitAlignment(Align, I);
+
+ O << name << ":\t\t\t\t" << CommentString << " " << I->getName() << '\n';
+
+ EmitGlobalConstant(C);
+
+ if (bCustomSegment)
+ O << name << "?\tends\n";
+ }
+
+ // Bypass X86SharedAsmPrinter::doFinalization().
+ AsmPrinter::doFinalization(M);
+ SwitchToDataSection("", 0);
+ O << "\tend\n";
+ return false; // success
+}
+
+void X86IntelAsmPrinter::EmitString(const ConstantArray *CVA) const {
+ unsigned NumElts = CVA->getNumOperands();
+ if (NumElts) {
+ // ML does not have escape sequences except '' for '. It also has a maximum
+ // string length of 255.
+ unsigned len = 0;
+ bool inString = false;
+ for (unsigned i = 0; i < NumElts; i++) {
+ int n = cast<ConstantInt>(CVA->getOperand(i))->getRawValue() & 255;
+ if (len == 0)
+ O << "\tdb ";
+
+ if (n >= 32 && n <= 127) {
+ if (!inString) {
+ if (len > 0) {
+ O << ",'";
+ len += 2;
+ } else {
+ O << "'";
+ len++;
+ }
+ inString = true;
+ }
+ if (n == '\'') {
+ O << "'";
+ len++;
+ }
+ O << char(n);
+ } else {
+ if (inString) {
+ O << "'";
+ len++;
+ inString = false;
+ }
+ if (len > 0) {
+ O << ",";
+ len++;
+ }
+ O << n;
+ len += 1 + (n > 9) + (n > 99);
+ }
+
+ if (len > 60) {
+ if (inString) {
+ O << "'";
+ inString = false;
+ }
+ O << "\n";
+ len = 0;
+ }
+ }
+
+ if (len > 0) {
+ if (inString)
+ O << "'";
+ O << "\n";
+ }
+ }
+}
+
// Include the auto-generated portion of the assembly writer.
#include "X86GenAsmWriter1.inc"
projects / oota-llvm.git / blobdiff