MCAsmInfoDarwin.cpp revision cee63322eaccc2f1067bdf5eab506e440f867da1 
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  AllowQuotesInName = true;
25  HasSingleParameterDotFile = false;
26  HasSubsectionsViaSymbols = true;
27
28  AlignmentIsInBytes = false;
29  COMMDirectiveAlignmentIsInBytes = 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
40  HiddenVisibilityAttr = MCSA_PrivateExtern;
41  // Doesn't support protected visibility.
42  ProtectedVisibilityAttr = MCSA_Global;
43
44
45  HasDotTypeDotSizeDirective = false;
46  HasNoDeadStrip = true;
47  // Note: Even though darwin has the .lcomm directive, it is just a synonym for
48  // zerofill, so we prefer to use .zerofill.
49
50  // _foo.eh symbols are currently always exported so that the linker knows
51  // about them.  This is not necessary on 10.6 and later, but it
52  // doesn't hurt anything.
53  // FIXME: I need to get this from Triple.
54  Is_EHSymbolPrivate = false;
55  GlobalEHDirective = "\t.globl\t";
56  SupportsWeakOmittedEHFrame = false;
57}
58
59