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   AddressSize(4),
  23   NeedsSet(false),
  24   MaxInstLength(4),
  25   SeparatorChar(';'),
  26   CommentString("#"),
  27   GlobalPrefix(""),
  28   PrivateGlobalPrefix("."),
  29   GlobalVarAddrPrefix(""),
  30   GlobalVarAddrSuffix(""),
  31   FunctionAddrPrefix(""),
  32   FunctionAddrSuffix(""),
  33   InlineAsmStart("#APP"),
  34   InlineAsmEnd("#NO_APP"),
  35   ZeroDirective("\t.zero\t"),
  36   ZeroDirectiveSuffix(0),
  37   AsciiDirective("\t.ascii\t"),
  38   AscizDirective("\t.asciz\t"),
  39   Data8bitsDirective("\t.byte\t"),
  40   Data16bitsDirective("\t.short\t"),
  41   Data32bitsDirective("\t.long\t"),
  42   Data64bitsDirective("\t.quad\t"),
  43   AlignDirective("\t.align\t"),
  44   AlignmentIsInBytes(true),
  45   SwitchToSectionDirective("\t.section\t"),
  46   TextSectionStartSuffix(""),
  47   DataSectionStartSuffix(""),
  48   SectionEndDirectiveSuffix(0),
  49   ConstantPoolSection("\t.section .rodata\n"),
  50   JumpTableDataSection("\t.section .rodata\n"),
  51   JumpTableDirective(0),
  52   CStringSection(0),
  53   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  54   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  55   FourByteConstantSection(0),
  56   EightByteConstantSection(0),
  57   SixteenByteConstantSection(0),
  58   SetDirective(0),
  59   LCOMMDirective(0),
  60   COMMDirective("\t.comm\t"),
  61   COMMDirectiveTakesAlignment(true),
  62   HasDotTypeDotSizeDirective(true),
  63   UsedDirective(0),
  64   HasLEB128(false),
  65   HasDotLoc(false),
  66   HasDotFile(false),
  67   DwarfRequiresFrameSection(true),
  68   DwarfAbbrevSection(".debug_abbrev"),
  69   DwarfInfoSection(".debug_info"),
  70   DwarfLineSection(".debug_line"),
  71   DwarfFrameSection(".debug_frame"),
  72   DwarfPubNamesSection(".debug_pubnames"),
  73   DwarfPubTypesSection(".debug_pubtypes"),
  74   DwarfStrSection(".debug_str"),
  75   DwarfLocSection(".debug_loc"),
  76   DwarfARangesSection(".debug_aranges"),
  77   DwarfRangesSection(".debug_ranges"),
  78   DwarfMacInfoSection(".debug_macinfo") {
  79 }
  80
  81 TargetAsmInfo::~TargetAsmInfo() {
  82 }
  83
  84 /// Measure the specified inline asm to determine an approximation of its
  85 /// length.
  86 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
  87   // Count the number of instructions in the asm.
  88   unsigned NumInsts = 0;
  89   for (; *Str; ++Str) {
  90     if (*Str == '\n' || *Str == SeparatorChar)
  91       ++NumInsts;
  92   }
  93
  94   // Multiply by the worst-case length for each instruction.
  95   return NumInsts * MaxInstLength;
  96 }