lib/Target/X86/X86TargetAsmInfo.cpp

   1 //===-- X86TargetAsmInfo.cpp - X86 asm properties ---------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file contains the declarations of the X86TargetAsmInfo properties.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "X86TargetAsmInfo.h"
  15 #include "X86TargetMachine.h"
  16 #include "X86Subtarget.h"
  17 #include "llvm/DerivedTypes.h"
  18 #include "llvm/InlineAsm.h"
  19 #include "llvm/Instructions.h"
  20 #include "llvm/Intrinsics.h"
  21 #include "llvm/Module.h"
  22 #include "llvm/ADT/StringExtras.h"
  23 #include "llvm/Support/Dwarf.h"
  24 #include "llvm/Support/ErrorHandling.h"
  25
  26 using namespace llvm;
  27 using namespace llvm::dwarf;
  28
  29 const char *const llvm::x86_asm_table[] = {
  30   "{si}", "S",
  31   "{di}", "D",
  32   "{ax}", "a",
  33   "{cx}", "c",
  34   "{memory}", "memory",
  35   "{flags}", "",
  36   "{dirflag}", "",
  37   "{fpsr}", "",
  38   "{cc}", "cc",
  39   0,0};
  40
  41 X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
  42   X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
  43   const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
  44   bool is64Bit = Subtarget->is64Bit();
  45
  46   AlignmentIsInBytes = false;
  47   TextAlignFillValue = 0x90;
  48
  49
  50   if (!is64Bit)
  51     Data64bitsDirective = 0;       // we can't emit a 64-bit unit
  52   ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
  53   ZeroFillDirective = "\t.zerofill\t";  // Uses .zerofill
  54   LCOMMDirective = "\t.lcomm\t";
  55
  56   // Leopard and above support aligned common symbols.
  57   COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
  58   HasDotTypeDotSizeDirective = false;
  59
  60   if (is64Bit) {
  61     PersonalityPrefix = "";
  62     PersonalitySuffix = "+4@GOTPCREL";
  63   } else {
  64     PersonalityPrefix = "L";
  65     PersonalitySuffix = "$non_lazy_ptr";
  66   }
  67
  68   InlineAsmStart = "## InlineAsm Start";
  69   InlineAsmEnd = "## InlineAsm End";
  70   CommentString = "##";
  71   SetDirective = "\t.set";
  72   PCSymbol = ".";
  73   UsedDirective = "\t.no_dead_strip\t";
  74   ProtectedDirective = "\t.globl\t";
  75
  76   SupportsDebugInformation = true;
  77   DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
  78   DwarfUsesInlineInfoSection = true;
  79
  80   // Exceptions handling
  81   SupportsExceptionHandling = true;
  82   GlobalEHDirective = "\t.globl\t";
  83   SupportsWeakOmittedEHFrame = false;
  84   AbsoluteEHSectionOffsets = false;
  85 }
  86
  87 X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM) :
  88   X86TargetAsmInfo<TargetAsmInfo>(TM) {
  89
  90   PrivateGlobalPrefix = ".L";
  91   WeakRefDirective = "\t.weak\t";
  92   SetDirective = "\t.set\t";
  93   PCSymbol = ".";
  94
  95   // Set up DWARF directives
  96   HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
  97
  98   // Debug Information
  99   AbsoluteDebugSectionOffsets = true;
 100   SupportsDebugInformation = true;
 101   DwarfAbbrevSection =  "\t.section\t.debug_abbrev,\"\",@progbits";
 102   DwarfInfoSection =    "\t.section\t.debug_info,\"\",@progbits";
 103   DwarfLineSection =    "\t.section\t.debug_line,\"\",@progbits";
 104   DwarfFrameSection =   "\t.section\t.debug_frame,\"\",@progbits";
 105   DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
 106   DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
 107   DwarfStrSection =     "\t.section\t.debug_str,\"\",@progbits";
 108   DwarfLocSection =     "\t.section\t.debug_loc,\"\",@progbits";
 109   DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
 110   DwarfRangesSection =  "\t.section\t.debug_ranges,\"\",@progbits";
 111   DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
 112
 113   // Exceptions handling
 114   SupportsExceptionHandling = true;
 115   AbsoluteEHSectionOffsets = false;
 116
 117   // On Linux we must declare when we can use a non-executable stack.
 118   if (TM.getSubtarget<X86Subtarget>().isLinux())
 119     NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
 120 }
 121
 122
 123 X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
 124   X86TargetAsmInfo<TargetAsmInfo>(TM) {
 125   GlobalPrefix = "_";
 126   CommentString = ";";
 127
 128   InlineAsmStart = "; InlineAsm Start";
 129   InlineAsmEnd   = "; InlineAsm End";
 130
 131   PrivateGlobalPrefix = "$";
 132   AlignDirective = "\tALIGN\t";
 133   ZeroDirective = "\tdb\t";
 134   ZeroDirectiveSuffix = " dup(0)";
 135   AsciiDirective = "\tdb\t";
 136   AscizDirective = 0;
 137   Data8bitsDirective = "\tdb\t";
 138   Data16bitsDirective = "\tdw\t";
 139   Data32bitsDirective = "\tdd\t";
 140   Data64bitsDirective = "\tdq\t";
 141   HasDotTypeDotSizeDirective = false;
 142   HasSingleParameterDotFile = false;
 143
 144   AlignmentIsInBytes = true;
 145
 146   SwitchToSectionDirective = "";
 147   TextSectionStartSuffix = "\tSEGMENT PARA 'CODE'";
 148   DataSectionStartSuffix = "\tSEGMENT PARA 'DATA'";
 149   SectionEndDirectiveSuffix = "\tends\n";
 150 }
 151
 152 // Instantiate default implementation.
 153 TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);