MCAsmInfoDarwin.cpp revision 221345 
1//===-- MCAsmInfoDarwin.cpp - Darwin 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 defines target asm properties related what form asm statements
11// should take in general on Darwin-based targets
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/MC/MCAsmInfoDarwin.h"
16#include "llvm/MC/MCContext.h"
17#include "llvm/MC/MCExpr.h"
18#include "llvm/MC/MCStreamer.h"
19using namespace llvm;
20
21MCAsmInfoDarwin::MCAsmInfoDarwin() {
22  // Common settings for all Darwin targets.
23  // Syntax:
24  GlobalPrefix = "_";
25  PrivateGlobalPrefix = "L";
26  LinkerPrivateGlobalPrefix = "l";
27  AllowQuotesInName = true;
28  HasSingleParameterDotFile = false;
29  HasSubsectionsViaSymbols = true;
30
31  AlignmentIsInBytes = false;
32  COMMDirectiveAlignmentIsInBytes = false;
33  InlineAsmStart = " InlineAsm Start";
34  InlineAsmEnd = " InlineAsm End";
35
36  // Directives:
37  WeakDefDirective = "\t.weak_definition ";
38  WeakRefDirective = "\t.weak_reference ";
39  ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
40  HasMachoZeroFillDirective = true;  // Uses .zerofill
41  HasMachoTBSSDirective = true; // Uses .tbss
42  HasStaticCtorDtorReferenceInStaticMode = true;
43
44  // FIXME: Darwin 10 and newer don't need this.
45  LinkerRequiresNonEmptyDwarfLines = true;
46
47  // FIXME: Change this once MC is the system assembler.
48  HasAggressiveSymbolFolding = false;
49
50  HiddenVisibilityAttr = MCSA_PrivateExtern;
51  HiddenDeclarationVisibilityAttr = MCSA_Invalid;
52  // Doesn't support protected visibility.
53  ProtectedVisibilityAttr = MCSA_Global;
54
55  HasDotTypeDotSizeDirective = false;
56  HasNoDeadStrip = true;
57  HasSymbolResolver = true;
58
59  DwarfUsesAbsoluteLabelForStmtList = false;
60  DwarfUsesLabelOffsetForRanges = false;
61}
62