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