lib/Target/TargetAsmInfo.cpp

   1 //===-- TargetAsmInfo.cpp - Asm Info ---------------------------------------==//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by James M. Laskey and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines target asm properties related what form asm statements
  11 // should take.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm/Target/TargetAsmInfo.h"
  16
  17 using namespace llvm;
  18
  19 TargetAsmInfo::TargetAsmInfo() :
  20   TextSection(".text"),
  21   DataSection(".data"),
  22   BSSSection(".bss"),
  23   AddressSize(4),
  24   NeedsSet(false),
  25   MaxInstLength(4),
  26   SeparatorChar(';'),
  27   CommentString("#"),
  28   GlobalPrefix(""),
  29   PrivateGlobalPrefix("."),
  30   GlobalVarAddrPrefix(""),
  31   GlobalVarAddrSuffix(""),
  32   FunctionAddrPrefix(""),
  33   FunctionAddrSuffix(""),
  34   InlineAsmStart("#APP"),
  35   InlineAsmEnd("#NO_APP"),
  36   AssemblerDialect(0),
  37   ZeroDirective("\t.zero\t"),
  38   ZeroDirectiveSuffix(0),
  39   AsciiDirective("\t.ascii\t"),
  40   AscizDirective("\t.asciz\t"),
  41   Data8bitsDirective("\t.byte\t"),
  42   Data16bitsDirective("\t.short\t"),
  43   Data32bitsDirective("\t.long\t"),
  44   Data64bitsDirective("\t.quad\t"),
  45   AlignDirective("\t.align\t"),
  46   AlignmentIsInBytes(true),
  47   SwitchToSectionDirective("\t.section\t"),
  48   TextSectionStartSuffix(""),
  49   DataSectionStartSuffix(""),
  50   SectionEndDirectiveSuffix(0),
  51   ConstantPoolSection("\t.section .rodata\n"),
  52   JumpTableDataSection("\t.section .rodata\n"),
  53   JumpTableDirective(0),
  54   CStringSection(0),
  55   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  56   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  57   FourByteConstantSection(0),
  58   EightByteConstantSection(0),
  59   SixteenByteConstantSection(0),
  60   SetDirective(0),
  61   LCOMMDirective(0),
  62   COMMDirective("\t.comm\t"),
  63   COMMDirectiveTakesAlignment(true),
  64   HasDotTypeDotSizeDirective(true),
  65   UsedDirective(0),
  66   WeakRefDirective(0),
  67   HiddenDirective("\t.hidden\t"),
  68   HasLEB128(false),
  69   HasDotLoc(false),
  70   HasDotFile(false),
  71   DwarfRequiresFrameSection(true),
  72   DwarfAbbrevSection(".debug_abbrev"),
  73   DwarfInfoSection(".debug_info"),
  74   DwarfLineSection(".debug_line"),
  75   DwarfFrameSection(".debug_frame"),
  76   DwarfPubNamesSection(".debug_pubnames"),
  77   DwarfPubTypesSection(".debug_pubtypes"),
  78   DwarfStrSection(".debug_str"),
  79   DwarfLocSection(".debug_loc"),
  80   DwarfARangesSection(".debug_aranges"),
  81   DwarfRangesSection(".debug_ranges"),
  82   DwarfMacInfoSection(".debug_macinfo"),
  83   AsmTransCBE(0) {
  84 }
  85
  86 TargetAsmInfo::~TargetAsmInfo() {
  87 }
  88
  89 /// Measure the specified inline asm to determine an approximation of its
  90 /// length.
  91 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
  92   // Count the number of instructions in the asm.
  93   unsigned NumInsts = 0;
  94   for (; *Str; ++Str) {
  95     if (*Str == '\n' || *Str == SeparatorChar)
  96       ++NumInsts;
  97   }
  98
  99   // Multiply by the worst-case length for each instruction.
 100   return NumInsts * MaxInstLength;
 101 }