1 //===-- WebAssemblyMCAsmInfo.cpp - WebAssembly asm properties -------------===//
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 /// \file
11 /// \brief This file contains the declarations of the WebAssemblyMCAsmInfo
12 /// properties.
13 ///
14 //===----------------------------------------------------------------------===//
15 
16 #include "WebAssemblyMCAsmInfo.h"
17 #include "llvm/ADT/Triple.h"
18 #include "llvm/Support/CommandLine.h"
19 using namespace llvm;
20 
21 #define DEBUG_TYPE "wasm-mc-asm-info"
22 
23 WebAssemblyMCAsmInfo::~WebAssemblyMCAsmInfo() {}
24 
25 WebAssemblyMCAsmInfo::WebAssemblyMCAsmInfo(const Triple &T) {
26   PointerSize = CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4;
27 
28   // TODO: What should MaxInstLength be?
29 
30   // The s-expression format of WebAssembly uses LISP-style comments.
31   CommentString = ";;";
32 
33   PrivateGlobalPrefix = "";
34   PrivateLabelPrefix = "";
35 
36   UseDataRegionDirectives = true;
37 
38   Data8bitsDirective = "\t.int8\t";
39   Data16bitsDirective = "\t.int16\t";
40   Data32bitsDirective = "\t.int32\t";
41   Data64bitsDirective = "\t.int64\t";
42 
43   AlignmentIsInBytes = false;
44   COMMDirectiveAlignmentIsInBytes = false;
45   LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
46 
47   HasDotTypeDotSizeDirective = false;
48   HasSingleParameterDotFile = false;
49 
50   SupportsDebugInformation = true;
51 
52   // For now, WebAssembly does not support exceptions.
53   ExceptionsType = ExceptionHandling::None;
54 
55   // FIXME: modify AsmPrinter to be more flexible, and fix other virtual ISAs.
56   WeakDirective = "\t;; .weak\t";
57   GlobalDirective = "\t;; .globl\t";
58 
59   // TODO: UseIntegratedAssembler?
60 }
61