llvm-project/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCAsmInfo.cpp
Wouter van Oortmerssen 86cd2332ce [WebAssembly] Fixed DWARF DW_AT_low_pc encoded as 64-bit in wasm64
Also added general wasm64 DWARF test
Also added asserts for unsupported reloc combinations that triggered this bug.

Differential Revision: https://reviews.llvm.org/D90503
2020-10-30 16:42:48 -07:00

51 lines
1.6 KiB
C++

//===-- WebAssemblyMCAsmInfo.cpp - WebAssembly asm properties -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains the declarations of the WebAssemblyMCAsmInfo
/// properties.
///
//===----------------------------------------------------------------------===//
#include "WebAssemblyMCAsmInfo.h"
#include "llvm/ADT/Triple.h"
using namespace llvm;
#define DEBUG_TYPE "wasm-mc-asm-info"
WebAssemblyMCAsmInfo::~WebAssemblyMCAsmInfo() = default; // anchor.
WebAssemblyMCAsmInfo::WebAssemblyMCAsmInfo(const Triple &T,
const MCTargetOptions &Options) {
CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4;
// So far this is used for DWARF DW_AT_low_pc which is always 32-bit in Wasm.
CodePointerSize = 4;
// TODO: What should MaxInstLength be?
UseDataRegionDirectives = true;
// Use .skip instead of .zero because .zero is confusing when used with two
// arguments (it doesn't actually zero things out).
ZeroDirective = "\t.skip\t";
Data8bitsDirective = "\t.int8\t";
Data16bitsDirective = "\t.int16\t";
Data32bitsDirective = "\t.int32\t";
Data64bitsDirective = "\t.int64\t";
AlignmentIsInBytes = false;
COMMDirectiveAlignmentIsInBytes = false;
LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
SupportsDebugInformation = true;
// TODO: UseIntegratedAssembler?
}