MCAsmInfoDarwin.cpp revision 202878 
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"
16using namespace llvm;
17
18MCAsmInfoDarwin::MCAsmInfoDarwin() {
19  // Common settings for all Darwin targets.
20  // Syntax:
21  GlobalPrefix = "_";
22  PrivateGlobalPrefix = "L";
23  LinkerPrivateGlobalPrefix = "l";
24  NeedsSet = true;
25  AllowQuotesInName = true;
26  HasSingleParameterDotFile = false;
27  HasSubsectionsViaSymbols = true;
28
29  AlignmentIsInBytes = false;
30  InlineAsmStart = " InlineAsm Start";
31  InlineAsmEnd = " InlineAsm End";
32
33  // Directives:
34  WeakDefDirective = "\t.weak_definition ";
35  WeakRefDirective = "\t.weak_reference ";
36  ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
37  HasMachoZeroFillDirective = true;  // Uses .zerofill
38  HasStaticCtorDtorReferenceInStaticMode = true;
39  SetDirective = "\t.set";
40
41  HiddenVisibilityAttr = MCSA_PrivateExtern;
42  // Doesn't support protected visibility.
43  ProtectedVisibilityAttr = MCSA_Global;
44
45
46  HasDotTypeDotSizeDirective = false;
47  HasNoDeadStrip = true;
48  // Note: Even though darwin has the .lcomm directive, it is just a synonym for
49  // zerofill, so we prefer to use .zerofill.
50
51  // _foo.eh symbols are currently always exported so that the linker knows
52  // about them.  This is not necessary on 10.6 and later, but it
53  // doesn't hurt anything.
54  // FIXME: I need to get this from Triple.
55  Is_EHSymbolPrivate = false;
56  GlobalEHDirective = "\t.globl\t";
57  SupportsWeakOmittedEHFrame = false;
58}
59
60