MCAsmInfoDarwin.cpp revision de9a1a2055851a0f0a88e459cd23a246a90efd45 
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
21void MCAsmInfoDarwin::anchor() { }
22
23MCAsmInfoDarwin::MCAsmInfoDarwin() {
24  // Common settings for all Darwin targets.
25  // Syntax:
26  GlobalPrefix = "_";
27  PrivateGlobalPrefix = "L";
28  LinkerPrivateGlobalPrefix = "l";
29  HasSingleParameterDotFile = false;
30  HasSubsectionsViaSymbols = true;
31
32  AlignmentIsInBytes = false;
33  COMMDirectiveAlignmentIsInBytes = false;
34  LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
35  InlineAsmStart = " InlineAsm Start";
36  InlineAsmEnd = " InlineAsm End";
37
38  // Directives:
39  WeakDefDirective = "\t.weak_definition ";
40  WeakRefDirective = "\t.weak_reference ";
41  ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
42  HasMachoZeroFillDirective = true;  // Uses .zerofill
43  HasMachoTBSSDirective = true; // Uses .tbss
44  HasStaticCtorDtorReferenceInStaticMode = true;
45
46  // FIXME: Darwin 10 and newer don't need this.
47  LinkerRequiresNonEmptyDwarfLines = true;
48
49  // FIXME: Change this once MC is the system assembler.
50  HasAggressiveSymbolFolding = false;
51
52  HiddenVisibilityAttr = MCSA_PrivateExtern;
53  HiddenDeclarationVisibilityAttr = MCSA_Invalid;
54
55  // Doesn't support protected visibility.
56  ProtectedVisibilityAttr = MCSA_Invalid;
57
58  HasDotTypeDotSizeDirective = false;
59  HasNoDeadStrip = true;
60
61  DwarfUsesRelocationsAcrossSections = false;
62}
63