X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86ATTAsmPrinter.cpp;h=10a2c89fbacc338031869f9175bb21cf07596529;hb=ea348585c80f5b1f51776dd850ecbdce034f2f19;hp=39a82ad4fe68f4120471cbd6325b5d900519b6cb;hpb=73213f6c07afc1479f8d7bf53ea99adf7fd60b78;p=oota-llvm.git

diff --git a/lib/Target/X86/X86ATTAsmPrinter.cpp b/lib/Target/X86/X86ATTAsmPrinter.cpp
index 39a82ad4fe6..10a2c89fbac 100755
--- a/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -18,34 +18,79 @@
 #include "X86TargetMachine.h"
 #include "llvm/Module.h"
 #include "llvm/Support/Mangler.h"
+#include "llvm/Target/TargetOptions.h"
+#include <iostream>
 using namespace llvm;
-using namespace x86;
 
 /// runOnMachineFunction - This uses the printMachineInstruction()
 /// method to print assembly for each instruction.
 ///
 bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
-  setupMachineFunction(MF);
+  if (Subtarget->isTargetDarwin()) {
+    // Let PassManager know we need debug information and relay
+    // the MachineDebugInfo address on to DwarfWriter.
+    DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
+  }
+
+  SetupMachineFunction(MF);
   O << "\n\n";
 
   // Print out constants referenced by the function
-  printConstantPool(MF.getConstantPool());
+  EmitConstantPool(MF.getConstantPool());
 
+  // Print out jump tables referenced by the function
+  EmitJumpTableInfo(MF.getJumpTableInfo());
+  
   // Print out labels for the function.
-  O << "\t.text\n";
-  emitAlignment(4);
-  O << "\t.globl\t" << CurrentFnName << "\n";
-  if (!forCygwin && !forDarwin)
-    O << "\t.type\t" << CurrentFnName << ", @function\n";
+  const Function *F = MF.getFunction();
+  switch (F->getLinkage()) {
+  default: assert(0 && "Unknown linkage type!");
+  case Function::InternalLinkage:  // Symbols default to internal.
+    SwitchToTextSection(DefaultTextSection, F);
+    EmitAlignment(4, F);     // FIXME: This should be parameterized somewhere.
+    break;
+  case Function::ExternalLinkage:
+    SwitchToTextSection(DefaultTextSection, F);
+    EmitAlignment(4, F);     // FIXME: This should be parameterized somewhere.
+    O << "\t.globl\t" << CurrentFnName << "\n";
+    break;
+  case Function::WeakLinkage:
+  case Function::LinkOnceLinkage:
+    if (Subtarget->isTargetDarwin()) {
+      SwitchToTextSection(
+                ".section __TEXT,__textcoal_nt,coalesced,pure_instructions", F);
+      O << "\t.globl\t" << CurrentFnName << "\n";
+      O << "\t.weak_definition\t" << CurrentFnName << "\n";
+    } else if (Subtarget->TargetType == X86Subtarget::isCygwin) {
+      EmitAlignment(4, F);     // FIXME: This should be parameterized somewhere.
+      O << "\t.section\t.llvm.linkonce.t." << CurrentFnName
+        << ",\"ax\"\n";
+      SwitchToTextSection("", F);
+      O << "\t.weak " << CurrentFnName << "\n";
+    } else {
+      EmitAlignment(4, F);     // FIXME: This should be parameterized somewhere.
+      O << "\t.section\t.llvm.linkonce.t." << CurrentFnName
+        << ",\"ax\",@progbits\n";
+      SwitchToTextSection("", F);
+      O << "\t.weak " << CurrentFnName << "\n";
+    }
+    break;
+  }
   O << CurrentFnName << ":\n";
 
+  if (Subtarget->isTargetDarwin()) {
+    // 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 (I->pred_begin() != I->pred_end())
-      O << ".LBB" << 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.
@@ -53,74 +98,99 @@ bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
       printMachineInstruction(II);
     }
   }
-  if (!forDarwin)
+  if (HasDotTypeDotSizeDirective)
     O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
 
+  if (Subtarget->isTargetDarwin()) {
+    // Emit post-function debug information.
+    DW.EndFunction();
+  }
+
   // We didn't modify anything.
   return false;
 }
 
-void X86ATTAsmPrinter::printOp(const MachineOperand &MO, bool isCallOp) {
+void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
+                                    const char *Modifier) {
+  const MachineOperand &MO = MI->getOperand(OpNo);
   const MRegisterInfo &RI = *TM.getRegisterInfo();
   switch (MO.getType()) {
-  case MachineOperand::MO_VirtualRegister:
-  case MachineOperand::MO_MachineRegister:
+  case MachineOperand::MO_Register: {
     assert(MRegisterInfo::isPhysicalRegister(MO.getReg()) &&
            "Virtual registers should not make it this far!");
     O << '%';
-    for (const char *Name = RI.get(MO.getReg()).Name; *Name; ++Name)
+    unsigned Reg = MO.getReg();
+    if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
+      MVT::ValueType VT = (strcmp(Modifier,"subreg16") == 0)
+        ? MVT::i16 : MVT::i8;
+      Reg = getX86SubSuperRegister(Reg, VT);
+    }
+    for (const char *Name = RI.get(Reg).Name; *Name; ++Name)
       O << (char)tolower(*Name);
     return;
+  }
 
-  case MachineOperand::MO_SignExtendedImmed:
-  case MachineOperand::MO_UnextendedImmed:
-    O << '$' << (int)MO.getImmedValue();
+  case MachineOperand::MO_Immediate:
+    if (!Modifier || strcmp(Modifier, "debug") != 0)
+      O << '$';
+    O << MO.getImmedValue();
+    return;
+  case MachineOperand::MO_MachineBasicBlock:
+    printBasicBlockLabel(MO.getMachineBasicBlock());
     return;
-  case MachineOperand::MO_MachineBasicBlock: {
-    MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
-    O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
-      << "_" << MBBOp->getNumber () << "\t# "
-      << MBBOp->getBasicBlock ()->getName ();
+  case MachineOperand::MO_JumpTableIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << '$';
+    O << PrivateGlobalPrefix << "JTI" << getFunctionNumber() << "_"
+      << MO.getJumpTableIndex();
+    if (Subtarget->isTargetDarwin() && 
+        TM.getRelocationModel() == Reloc::PIC_)
+      O << "-\"L" << getFunctionNumber() << "$pb\"";
     return;
   }
-  case MachineOperand::MO_PCRelativeDisp:
-    std::cerr << "Shouldn't use addPCDisp() when building X86 MachineInstrs";
-    abort ();
+  case MachineOperand::MO_ConstantPoolIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << '$';
+    O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
+      << MO.getConstantPoolIndex();
+    if (Subtarget->isTargetDarwin() && 
+        TM.getRelocationModel() == Reloc::PIC_)
+      O << "-\"L" << getFunctionNumber() << "$pb\"";
+    int Offset = MO.getOffset();
+    if (Offset > 0)
+      O << "+" << Offset;
+    else if (Offset < 0)
+      O << Offset;
     return;
+  }
   case MachineOperand::MO_GlobalAddress: {
-    // Darwin block shameless ripped from PowerPCAsmPrinter.cpp
-    if (forDarwin) {
-      if (!isCallOp) O << '$';
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp && !isCallOp) O << '$';
+    // Darwin block shameless ripped from PPCAsmPrinter.cpp
+    if (Subtarget->isTargetDarwin() && 
+        TM.getRelocationModel() != Reloc::Static) {
       GlobalValue *GV = MO.getGlobal();
       std::string Name = Mang->getValueName(GV);
-
-      // Dynamically-resolved functions need a stub for the function.  Be
-      // wary however not to output $stub for external functions whose addresses
-      // are taken.  Those should be emitted as $non_lazy_ptr below.
-      Function *F = dyn_cast<Function>(GV);
-      if (F && isCallOp && F->isExternal()) {
-        FnStubs.insert(Name);
-        O << "L" << Name << "$stub";
-        return;
-      }
-
-      // Link-once, External, or Weakly-linked global variables need 
+      // Link-once, External, or Weakly-linked global variables need
       // non-lazily-resolved stubs
-      if (GV->hasLinkOnceLinkage()) {
-        LinkOnceStubs.insert(Name);
-        O << "L" << Name << "$non_lazy_ptr";
-        return;
-      }
-      if (GV->isExternal() || GV->hasWeakLinkage()) {
-        GVStubs.insert(Name);
-        O << "L" << Name << "$non_lazy_ptr";
-        return;
-      }
-      O << Mang->getValueName(GV);
-      return;
-    }
-    if (!isCallOp) O << '$';
-    O << Mang->getValueName(MO.getGlobal());
+      if (GV->isExternal() || GV->hasWeakLinkage() ||
+          GV->hasLinkOnceLinkage()) {
+        // Dynamically-resolved functions need a stub for the function.
+        if (isCallOp && isa<Function>(GV) && cast<Function>(GV)->isExternal()) {
+          FnStubs.insert(Name);
+          O << "L" << Name << "$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());
     int Offset = MO.getOffset();
     if (Offset > 0)
       O << "+" << Offset;
@@ -128,9 +198,13 @@ void X86ATTAsmPrinter::printOp(const MachineOperand &MO, bool isCallOp) {
       O << Offset;
     return;
   }
-  case MachineOperand::MO_ExternalSymbol:
-    if (isCallOp && forDarwin) {
-      std::string Name(GlobalPrefix); Name += MO.getSymbolName();
+  case MachineOperand::MO_ExternalSymbol: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    if (isCallOp && 
+        Subtarget->isTargetDarwin() && 
+        TM.getRelocationModel() != Reloc::Static) {
+      std::string Name(GlobalPrefix);
+      Name += MO.getSymbolName();
       FnStubs.insert(Name);
       O << "L" << Name << "$stub";
       return;
@@ -138,11 +212,27 @@ void X86ATTAsmPrinter::printOp(const MachineOperand &MO, bool isCallOp) {
     if (!isCallOp) O << '$';
     O << GlobalPrefix << MO.getSymbolName();
     return;
+  }
   default:
     O << "<unknown operand type>"; return;
   }
 }
 
+void X86ATTAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
+  unsigned char value = MI->getOperand(Op).getImmedValue();
+  assert(value <= 7 && "Invalid ssecc argument!");
+  switch (value) {
+  case 0: O << "eq"; break;
+  case 1: O << "lt"; break;
+  case 2: O << "le"; break;
+  case 3: O << "unord"; break;
+  case 4: O << "neq"; break;
+  case 5: O << "nlt"; break;
+  case 6: O << "nle"; break;
+  case 7: O << "ord"; break;
+  }
+}
+
 void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
   assert(isMem(MI, Op) && "Invalid memory reference!");
 
@@ -157,23 +247,10 @@ void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
       O << " + " << DispSpec.getImmedValue();
     O << "]";
     return;
-  } else if (BaseReg.isConstantPoolIndex()) {
-    O << ".CPI" << CurrentFnName << "_"
-      << BaseReg.getConstantPoolIndex();
-    if (DispSpec.getImmedValue())
-      O << "+" << DispSpec.getImmedValue();
-    if (IndexReg.getReg()) {
-      O << "(,";
-      printOp(IndexReg);
-      if (ScaleVal != 1)
-        O << "," << ScaleVal;
-      O << ")";
-    }
-    return;
   }
 
-  if (DispSpec.isGlobalAddress()) {
-    printOp(DispSpec, true);
+  if (DispSpec.isGlobalAddress() || DispSpec.isConstantPoolIndex()) {
+    printOperand(MI, Op+3, "mem");
   } else {
     int DispVal = DispSpec.getImmedValue();
     if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
@@ -183,11 +260,11 @@ void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
   if (IndexReg.getReg() || BaseReg.getReg()) {
     O << "(";
     if (BaseReg.getReg())
-      printOp(BaseReg);
+      printOperand(MI, Op);
 
     if (IndexReg.getReg()) {
       O << ",";
-      printOp(IndexReg);
+      printOperand(MI, Op+2);
       if (ScaleVal != 1)
         O << "," << ScaleVal;
     }
@@ -196,11 +273,123 @@ void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
   }
 }
 
+void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
+  O << "\"L" << getFunctionNumber() << "$pb\"\n";
+  O << "\"L" << getFunctionNumber() << "$pb\":";
+}
+
+
+bool X86ATTAsmPrinter::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 << '%';
+  for (const char *Name = RI.get(Reg).Name; *Name; ++Name)
+    O << (char)tolower(*Name);
+  return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool X86ATTAsmPrinter::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 X86ATTAsmPrinter::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 X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
   ++EmittedInsts;
+  // This works around some Darwin assembler bugs.
+  if (Subtarget->isTargetDarwin()) {
+    switch (MI->getOpcode()) {
+    case X86::REP_MOVSB:
+      O << "rep/movsb (%esi),(%edi)\n";
+      return;
+    case X86::REP_MOVSD:
+      O << "rep/movsl (%esi),(%edi)\n";
+      return;
+    case X86::REP_MOVSW:
+      O << "rep/movsw (%esi),(%edi)\n";
+      return;
+    case X86::REP_STOSB:
+      O << "rep/stosb\n";
+      return;
+    case X86::REP_STOSD:
+      O << "rep/stosl\n";
+      return;
+    case X86::REP_STOSW:
+      O << "rep/stosw\n";
+      return;
+    default:
+      break;
+    }
+  }
+
+  // See if a truncate instruction can be turned into a nop.
+  switch (MI->getOpcode()) {
+  default: break;
+  case X86::TRUNC_GR32_GR16:
+  case X86::TRUNC_GR32_GR8:
+  case X86::TRUNC_GR16_GR8: {
+    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_GR32_GR16)
+      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);
 }