llvm/lib/Target/ARM/MCTargetDesc/ARMMCAsmInfo.cpp

   1 //===-- ARMMCAsmInfo.cpp - ARM asm properties -----------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains the declarations of the ARMMCAsmInfo properties.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "ARMMCAsmInfo.h"
  14 #include "llvm/ADT/Triple.h"
  15
  16 using namespace llvm;
  17
  18 void ARMMCAsmInfoDarwin::anchor() { }
  19
  20 ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) {
  21   if ((TheTriple.getArch() == Triple::armeb) ||
  22       (TheTriple.getArch() == Triple::thumbeb))
  23     IsLittleEndian = false;
  24
  25   Data64bitsDirective = nullptr;
  26   CommentString = "@";
  27   Code16Directive = ".code\t16";
  28   Code32Directive = ".code\t32";
  29   UseDataRegionDirectives = true;
  30
  31   SupportsDebugInformation = true;
  32
  33   // Conditional Thumb 4-byte instructions can have an implicit IT.
  34   MaxInstLength = 6;
  35
  36   // Exceptions handling
  37   ExceptionsType = (TheTriple.isOSDarwin() && !TheTriple.isWatchABI())
  38                        ? ExceptionHandling::SjLj
  39                        : ExceptionHandling::DwarfCFI;
  40 }
  41
  42 void ARMELFMCAsmInfo::anchor() { }
  43
  44 ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) {
  45   if ((TheTriple.getArch() == Triple::armeb) ||
  46       (TheTriple.getArch() == Triple::thumbeb))
  47     IsLittleEndian = false;
  48
  49   // ".comm align is in bytes but .align is pow-2."
  50   AlignmentIsInBytes = false;
  51
  52   Data64bitsDirective = nullptr;
  53   CommentString = "@";
  54   Code16Directive = ".code\t16";
  55   Code32Directive = ".code\t32";
  56
  57   SupportsDebugInformation = true;
  58
  59   // Conditional Thumb 4-byte instructions can have an implicit IT.
  60   MaxInstLength = 6;
  61
  62   // Exceptions handling
  63   switch (TheTriple.getOS()) {
  64   case Triple::NetBSD:
  65     ExceptionsType = ExceptionHandling::DwarfCFI;
  66     break;
  67   default:
  68     ExceptionsType = ExceptionHandling::ARM;
  69     break;
  70   }
  71
  72   // foo(plt) instead of foo@plt
  73   UseParensForSymbolVariant = true;
  74 }
  75
  76 void ARMELFMCAsmInfo::setUseIntegratedAssembler(bool Value) {
  77   UseIntegratedAssembler = Value;
  78   if (!UseIntegratedAssembler) {
  79     // gas doesn't handle VFP register names in cfi directives,
  80     // so don't use register names with external assembler.
  81     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16694
  82     DwarfRegNumForCFI = true;
  83   }
  84 }
  85
  86 void ARMCOFFMCAsmInfoMicrosoft::anchor() { }
  87
  88 ARMCOFFMCAsmInfoMicrosoft::ARMCOFFMCAsmInfoMicrosoft() {
  89   AlignmentIsInBytes = false;
  90   SupportsDebugInformation = true;
  91   ExceptionsType = ExceptionHandling::WinEH;
  92   PrivateGlobalPrefix = "$M";
  93   PrivateLabelPrefix = "$M";
  94   CommentString = ";";
  95
  96   // Conditional Thumb 4-byte instructions can have an implicit IT.
  97   MaxInstLength = 6;
  98 }
  99
 100 void ARMCOFFMCAsmInfoGNU::anchor() { }
 101
 102 ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
 103   AlignmentIsInBytes = false;
 104   HasSingleParameterDotFile = true;
 105
 106   CommentString = "@";
 107   Code16Directive = ".code\t16";
 108   Code32Directive = ".code\t32";
 109   PrivateGlobalPrefix = ".L";
 110   PrivateLabelPrefix = ".L";
 111
 112   SupportsDebugInformation = true;
 113   ExceptionsType = ExceptionHandling::DwarfCFI;
 114   UseParensForSymbolVariant = true;
 115
 116   DwarfRegNumForCFI = false;
 117
 118   // Conditional Thumb 4-byte instructions can have an implicit IT.
 119   MaxInstLength = 6;
 120 }