llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCAsmInfo.cpp

   1 //===-- WebAssemblyMCAsmInfo.cpp - WebAssembly asm properties -------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file contains the declarations of the WebAssemblyMCAsmInfo
  11 /// properties.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "WebAssemblyMCAsmInfo.h"
  16 #include "Utils/WebAssemblyUtilities.h"
  17 #include "llvm/ADT/Triple.h"
  18
  19 using namespace llvm;
  20
  21 #define DEBUG_TYPE "wasm-mc-asm-info"
  22
  23 WebAssemblyMCAsmInfo::~WebAssemblyMCAsmInfo() = default; // anchor.
  24
  25 WebAssemblyMCAsmInfo::WebAssemblyMCAsmInfo(const Triple &T,
  26                                            const MCTargetOptions &Options) {
  27   CodePointerSize = CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4;
  28
  29   // TODO: What should MaxInstLength be?
  30
  31   UseDataRegionDirectives = true;
  32
  33   // Use .skip instead of .zero because .zero is confusing when used with two
  34   // arguments (it doesn't actually zero things out).
  35   ZeroDirective = "\t.skip\t";
  36
  37   Data8bitsDirective = "\t.int8\t";
  38   Data16bitsDirective = "\t.int16\t";
  39   Data32bitsDirective = "\t.int32\t";
  40   Data64bitsDirective = "\t.int64\t";
  41
  42   AlignmentIsInBytes = false;
  43   COMMDirectiveAlignmentIsInBytes = false;
  44   LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
  45
  46   SupportsDebugInformation = true;
  47
  48   // When compilation is done on a cpp file by clang, the exception model info
  49   // is stored in LangOptions, which is later used to set the info in
  50   // TargetOptions and then MCAsmInfo in LLVMTargetMachine::initAsmInfo(). But
  51   // this process does not happen when compiling bitcode directly with clang, so
  52   // we make sure this info is set correctly.
  53   if (WebAssembly::WasmEnableEH || WebAssembly::WasmEnableSjLj)
  54     ExceptionsType = ExceptionHandling::Wasm;
  55
  56   // TODO: UseIntegratedAssembler?
  57 }