X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FAsmPrinterDwarf.cpp;h=c141d60452b99eea8ca6b1a54c7021b9ce8500b0;hb=05497cc965b59dff8a8170c5cbbcef3dff251262;hp=17d3ef13c4226cf7473c788a3c4d53812bb945fb;hpb=126ae6815263aeffe4fbaa6dff1e4428aa8f0a91;p=oota-llvm.git

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
index 17d3ef13c42..c141d60452b 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -13,18 +13,19 @@
 
 #define DEBUG_TYPE "asm-printer"
 #include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/IR/DataLayout.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/TargetData.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Target/TargetFrameLowering.h"
 #include "llvm/Target/TargetLoweringObjectFile.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/Support/Dwarf.h"
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
@@ -32,65 +33,32 @@ using namespace llvm;
 //===----------------------------------------------------------------------===//
 
 /// EmitSLEB128 - emit the specified signed leb128 value.
-void AsmPrinter::EmitSLEB128(int Value, const char *Desc) const {
+void AsmPrinter::EmitSLEB128(int64_t Value, const char *Desc) const {
   if (isVerbose() && Desc)
     OutStreamer.AddComment(Desc);
-    
-  if (MAI->hasLEB128()) {
-    OutStreamer.EmitSLEB128IntValue(Value);
-    return;
-  }
 
-  // If we don't have .sleb128, emit as .bytes.
-  int Sign = Value >> (8 * sizeof(Value) - 1);
-  bool IsMore;
-  
-  do {
-    unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
-    Value >>= 7;
-    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
-    if (IsMore) Byte |= 0x80;
-    OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
-  } while (IsMore);
+  OutStreamer.EmitSLEB128IntValue(Value);
 }
 
 /// EmitULEB128 - emit the specified signed leb128 value.
-void AsmPrinter::EmitULEB128(unsigned Value, const char *Desc,
+void AsmPrinter::EmitULEB128(uint64_t Value, const char *Desc,
                              unsigned PadTo) const {
   if (isVerbose() && Desc)
     OutStreamer.AddComment(Desc);
 
-  // FIXME: Should we add a PadTo option to the streamer?
-  if (MAI->hasLEB128() && PadTo == 0) {
-    OutStreamer.EmitULEB128IntValue(Value); 
-    return;
-  }
-  
-  // If we don't have .uleb128 or we want to emit padding, emit as .bytes.
-  do {
-    unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
-    Value >>= 7;
-    if (Value || PadTo != 0) Byte |= 0x80;
-    OutStreamer.EmitIntValue(Byte, 1, /*addrspace*/0);
-  } while (Value);
-
-  if (PadTo) {
-    if (PadTo > 1)
-      OutStreamer.EmitFill(PadTo - 1, 0x80/*fillval*/, 0/*addrspace*/);
-    OutStreamer.EmitFill(1, 0/*fillval*/, 0/*addrspace*/);
-  }
+  OutStreamer.EmitULEB128IntValue(Value, PadTo);
 }
 
 /// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
 void AsmPrinter::EmitCFAByte(unsigned Val) const {
   if (isVerbose()) {
     if (Val >= dwarf::DW_CFA_offset && Val < dwarf::DW_CFA_offset+64)
-      OutStreamer.AddComment("DW_CFA_offset + Reg (" + 
+      OutStreamer.AddComment("DW_CFA_offset + Reg (" +
                              Twine(Val-dwarf::DW_CFA_offset) + ")");
     else
       OutStreamer.AddComment(dwarf::CallFrameString(Val));
   }
-  OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/);
+  OutStreamer.EmitIntValue(Val, 1);
 }
 
 static const char *DecodeDWARFEncoding(unsigned Encoding) {
@@ -115,7 +83,7 @@ static const char *DecodeDWARFEncoding(unsigned Encoding) {
   case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8:
     return "indirect pcrel sdata8";
   }
-  
+
   return "<unknown encoding>";
 }
 
@@ -133,38 +101,34 @@ void AsmPrinter::EmitEncodingByte(unsigned Val, const char *Desc) const {
       OutStreamer.AddComment(Twine("Encoding = ") +
                              DecodeDWARFEncoding(Val));
   }
-  
-  OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/);
+
+  OutStreamer.EmitIntValue(Val, 1);
 }
 
 /// GetSizeOfEncodedValue - Return the size of the encoding in bytes.
 unsigned AsmPrinter::GetSizeOfEncodedValue(unsigned Encoding) const {
   if (Encoding == dwarf::DW_EH_PE_omit)
     return 0;
-  
+
   switch (Encoding & 0x07) {
-  default: assert(0 && "Invalid encoded value.");
-  case dwarf::DW_EH_PE_absptr: return TM.getTargetData()->getPointerSize();
+  default: llvm_unreachable("Invalid encoded value.");
+  case dwarf::DW_EH_PE_absptr: return TM.getDataLayout()->getPointerSize();
   case dwarf::DW_EH_PE_udata2: return 2;
   case dwarf::DW_EH_PE_udata4: return 4;
   case dwarf::DW_EH_PE_udata8: return 8;
   }
 }
 
-void AsmPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const {
-  const TargetLoweringObjectFile &TLOF = getObjFileLowering();
-  
-  const MCExpr *Exp =
-    TLOF.getExprForDwarfReference(Sym, Mang, MMI, Encoding, OutStreamer);
-  OutStreamer.EmitAbsValue(Exp, GetSizeOfEncodedValue(Encoding));
-}
+void AsmPrinter::EmitTTypeReference(const GlobalValue *GV,
+                                    unsigned Encoding) const {
+  if (GV) {
+    const TargetLoweringObjectFile &TLOF = getObjFileLowering();
 
-void AsmPrinter::EmitReference(const GlobalValue *GV, unsigned Encoding)const{
-  const TargetLoweringObjectFile &TLOF = getObjFileLowering();
-  
-  const MCExpr *Exp =
-    TLOF.getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, OutStreamer);
-  OutStreamer.EmitValue(Exp, GetSizeOfEncodedValue(Encoding), /*addrspace*/0);
+    const MCExpr *Exp =
+      TLOF.getTTypeGlobalReference(GV, Mang, MMI, Encoding, OutStreamer);
+    OutStreamer.EmitValue(Exp, GetSizeOfEncodedValue(Encoding));
+  } else
+    OutStreamer.EmitIntValue(0, GetSizeOfEncodedValue(Encoding));
 }
 
 /// EmitSectionOffset - Emit the 4-byte offset of Label from the start of its
@@ -177,27 +141,26 @@ void AsmPrinter::EmitReference(const GlobalValue *GV, unsigned Encoding)const{
 void AsmPrinter::EmitSectionOffset(const MCSymbol *Label,
                                    const MCSymbol *SectionLabel) const {
   // On COFF targets, we have to emit the special .secrel32 directive.
-  if (const char *SecOffDir = MAI->getDwarfSectionOffsetDirective()) {
-    // FIXME: MCize.
-    OutStreamer.EmitRawText(SecOffDir + Twine(Label->getName()));
+  if (MAI->needsDwarfSectionOffsetDirective()) {
+    OutStreamer.EmitCOFFSecRel32(Label);
     return;
   }
-  
+
   // Get the section that we're referring to, based on SectionLabel.
   const MCSection &Section = SectionLabel->getSection();
-  
+
   // If Label has already been emitted, verify that it is in the same section as
   // section label for sanity.
   assert((!Label->isInSection() || &Label->getSection() == &Section) &&
          "Section offset using wrong section base for label");
-  
+
   // If the section in question will end up with an address of 0 anyway, we can
   // just emit an absolute reference to save a relocation.
   if (Section.isBaseAddressKnownZero()) {
-    OutStreamer.EmitSymbolValue(Label, 4, 0/*AddrSpace*/);
+    OutStreamer.EmitSymbolValue(Label, 4);
     return;
   }
-  
+
   // Otherwise, emit it as a label difference from the start of the section.
   EmitLabelDifference(Label, SectionLabel, 4);
 }
@@ -206,113 +169,21 @@ void AsmPrinter::EmitSectionOffset(const MCSymbol *Label,
 // Dwarf Lowering Routines
 //===----------------------------------------------------------------------===//
 
-
-/// EmitFrameMoves - Emit frame instructions to describe the layout of the
-/// frame.
-void AsmPrinter::EmitFrameMoves(const std::vector<MachineMove> &Moves,
-                                MCSymbol *BaseLabel, bool isEH) const {
-  const TargetRegisterInfo *RI = TM.getRegisterInfo();
-  
-  int stackGrowth = TM.getTargetData()->getPointerSize();
-  if (TM.getFrameLowering()->getStackGrowthDirection() !=
-      TargetFrameLowering::StackGrowsUp)
-    stackGrowth *= -1;
-  
-  for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
-    const MachineMove &Move = Moves[i];
-    MCSymbol *Label = Move.getLabel();
-    // Throw out move if the label is invalid.
-    if (Label && !Label->isDefined()) continue; // Not emitted, in dead code.
-    
-    const MachineLocation &Dst = Move.getDestination();
-    const MachineLocation &Src = Move.getSource();
-    
-    // Advance row if new location.
-    if (BaseLabel && Label) {
-      MCSymbol *ThisSym = Label;
-      if (ThisSym != BaseLabel) {
-        EmitCFAByte(dwarf::DW_CFA_advance_loc4);
-        EmitLabelDifference(ThisSym, BaseLabel, 4);
-        BaseLabel = ThisSym;
-      }
-    }
-    
-    // If advancing cfa.
-    if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
-      assert(!Src.isReg() && "Machine move not supported yet.");
-      
-      if (Src.getReg() == MachineLocation::VirtualFP) {
-        EmitCFAByte(dwarf::DW_CFA_def_cfa_offset);
-      } else {
-        EmitCFAByte(dwarf::DW_CFA_def_cfa);
-        EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register");
-      }
-      
-      EmitULEB128(-Src.getOffset(), "Offset");
-      continue;
-    }
-    
-    if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
-      assert(Dst.isReg() && "Machine move not supported yet.");
-      EmitCFAByte(dwarf::DW_CFA_def_cfa_register);
-      EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register");
-      continue;
-    }
-    
-    unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
-    int Offset = Dst.getOffset() / stackGrowth;
-    
-    if (Offset < 0) {
-      EmitCFAByte(dwarf::DW_CFA_offset_extended_sf);
-      EmitULEB128(Reg, "Reg");
-      EmitSLEB128(Offset, "Offset");
-    } else if (Reg < 64) {
-      EmitCFAByte(dwarf::DW_CFA_offset + Reg);
-      EmitULEB128(Offset, "Offset");
-    } else {
-      EmitCFAByte(dwarf::DW_CFA_offset_extended);
-      EmitULEB128(Reg, "Reg");
-      EmitULEB128(Offset, "Offset");
-    }
-  }
-}
-
-/// EmitFrameMoves - Emit a frame instruction.
-void AsmPrinter::EmitCFIFrameMove(const MachineMove &Move) const {
-  const TargetRegisterInfo *RI = TM.getRegisterInfo();
-
-  const MachineLocation &Dst = Move.getDestination();
-  const MachineLocation &Src = Move.getSource();
-
-  // If advancing cfa.
-  if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
-    assert(!Src.isReg() && "Machine move not supported yet.");
-
-    if (Src.getReg() == MachineLocation::VirtualFP) {
-      OutStreamer.EmitCFIDefCfaOffset(-Src.getOffset());
-    } else {
-      assert("Machine move not supported yet");
-      // Reg + Offset
-    }
-  } else if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
-    assert(Dst.isReg() && "Machine move not supported yet.");
-    OutStreamer.EmitCFIDefCfaRegister(RI->getDwarfRegNum(Dst.getReg(), true));
-  } else {
-    assert(!Dst.isReg() && "Machine move not supported yet.");
-    OutStreamer.EmitCFIOffset(RI->getDwarfRegNum(Src.getReg(), true),
-                              -Dst.getOffset());
-  }
-}
-
-/// EmitFrameMoves - Emit frame instructions to describe the layout of the
-/// frame.
-void AsmPrinter::EmitCFIFrameMoves(const std::vector<MachineMove> &Moves) const {
-  for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
-    const MachineMove &Move = Moves[i];
-    MCSymbol *Label = Move.getLabel();
-    // Throw out move if the label is invalid.
-    if (Label && !Label->isDefined()) continue; // Not emitted, in dead code.
-
-    EmitCFIFrameMove(Move);
+void AsmPrinter::emitCFIInstruction(const MCCFIInstruction &Inst) const {
+  switch (Inst.getOperation()) {
+  default:
+    llvm_unreachable("Unexpected instruction");
+  case MCCFIInstruction::OpDefCfaOffset:
+    OutStreamer.EmitCFIDefCfaOffset(Inst.getOffset());
+    break;
+  case MCCFIInstruction::OpDefCfa:
+    OutStreamer.EmitCFIDefCfa(Inst.getRegister(), Inst.getOffset());
+    break;
+  case MCCFIInstruction::OpDefCfaRegister:
+    OutStreamer.EmitCFIDefCfaRegister(Inst.getRegister());
+    break;
+  case MCCFIInstruction::OpOffset:
+    OutStreamer.EmitCFIOffset(Inst.getRegister(), Inst.getOffset());
+    break;
   }
 }