50428fb5e9
Move wasm-specific members outside of MCSymbolRefExpr::VariantKind (a legacy interface I am eliminating). Most changes are mechanic and similar to what I've done for many ELF targets (e.g. X86 #132149) Notes: * `fixSymbolsInTLSFixups` is replaced with `setTLS` in `WebAssemblyWasmObjectWriter::getRelocType`, similar to what I've done for many ELF targets. * `SymA->setUsedInGOT()` in `recordRelocation` is moved to `getRelocType`. While here, rename "Modifier' to "Specifier": > "Relocation modifier", though concise, suggests adjustments happen during the linker's relocation step rather than the assembler's expression evaluation. I landed on "relocation specifier" as the winner. It's clear, aligns with Arm and IBM’s usage, and fits the assembler's role seamlessly. Pull Request: https://github.com/llvm/llvm-project/pull/133116
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
//===-- WebAssemblyMCAsmInfo.cpp - WebAssembly asm properties -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file contains the declarations of the WebAssemblyMCAsmInfo
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/// properties.
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///
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//===----------------------------------------------------------------------===//
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#include "WebAssemblyMCAsmInfo.h"
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#include "WebAssemblyMCExpr.h"
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#include "WebAssemblyMCTargetDesc.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/TargetParser/Triple.h"
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using namespace llvm;
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#define DEBUG_TYPE "wasm-mc-asm-info"
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const MCAsmInfo::AtSpecifier atSpecifiers[] = {
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{WebAssembly::S_TYPEINDEX, "TYPEINDEX"},
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{WebAssembly::S_TBREL, "TBREL"},
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{WebAssembly::S_MBREL, "MBREL"},
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{WebAssembly::S_TLSREL, "TLSREL"},
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{WebAssembly::S_GOT, "GOT"},
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{WebAssembly::S_GOT_TLS, "GOT@TLS"},
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{WebAssembly::S_FUNCINDEX, "FUNCINDEX"},
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};
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WebAssemblyMCAsmInfo::~WebAssemblyMCAsmInfo() = default; // anchor.
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WebAssemblyMCAsmInfo::WebAssemblyMCAsmInfo(const Triple &T,
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const MCTargetOptions &Options) {
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CodePointerSize = CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4;
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// TODO: What should MaxInstLength be?
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UseDataRegionDirectives = true;
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// Use .skip instead of .zero because .zero is confusing when used with two
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// arguments (it doesn't actually zero things out).
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ZeroDirective = "\t.skip\t";
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Data8bitsDirective = "\t.int8\t";
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Data16bitsDirective = "\t.int16\t";
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Data32bitsDirective = "\t.int32\t";
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Data64bitsDirective = "\t.int64\t";
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AlignmentIsInBytes = false;
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COMMDirectiveAlignmentIsInBytes = false;
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LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
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SupportsDebugInformation = true;
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// When compilation is done on a cpp file by clang, the exception model info
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// is stored in LangOptions, which is later used to set the info in
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// TargetOptions and then MCAsmInfo in CodeGenTargetMachine::initAsmInfo().
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// But this process does not happen when compiling bitcode directly with
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// clang, so we make sure this info is set correctly.
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if (WebAssembly::WasmEnableEH || WebAssembly::WasmEnableSjLj)
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ExceptionsType = ExceptionHandling::Wasm;
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initializeVariantKinds(atSpecifiers);
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}
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