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538b137e0b
This to protect against non-sensical instruction sequences being assembled, which would either cause asserts/crashes further down, or a Wasm module being output that doesn't validate. Unlike a validator, this type checker is able to give type-errors as part of the parsing process, which makes the assembler much friendlier to be used by humans writing manual input. Because the MC system is single pass (instructions aren't even stored in MC format, they are directly output) the type checker has to be single pass as well, which means that from now on .globaltype and .functype decls must come before their use. An extra pass is added to Codegen to collect information for this purpose, since AsmPrinter is normally single pass / streaming as well, and would otherwise generate this information on the fly. A `-no-type-check` flag was added to llvm-mc (and any other tools that take asm input) that surpresses type errors, as a quick escape hatch for tests that were not intended to be type correct. This is a first version of the type checker that ignores control flow, i.e. it checks that types are correct along the linear path, but not the branch path. This will still catch most errors. Branch checking could be added in the future. Differential Revision: https://reviews.llvm.org/D104945
121 lines
4.6 KiB
C++
121 lines
4.6 KiB
C++
//===-- MCTargetOptionsCommandFlags.cpp --------------------------*- C++
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//-*-===//
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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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// This file contains machine code-specific flags that are shared between
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// different command line tools.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCTargetOptionsCommandFlags.h"
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#include "llvm/MC/MCTargetOptions.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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#define MCOPT(TY, NAME) \
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static cl::opt<TY> *NAME##View; \
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TY llvm::mc::get##NAME() { \
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assert(NAME##View && "RegisterMCTargetOptionsFlags not created."); \
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return *NAME##View; \
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}
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#define MCOPT_EXP(TY, NAME) \
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MCOPT(TY, NAME) \
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Optional<TY> llvm::mc::getExplicit##NAME() { \
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if (NAME##View->getNumOccurrences()) { \
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TY res = *NAME##View; \
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return res; \
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} \
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return None; \
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}
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MCOPT_EXP(bool, RelaxAll)
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MCOPT(bool, IncrementalLinkerCompatible)
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MCOPT(int, DwarfVersion)
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MCOPT(bool, Dwarf64)
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MCOPT(bool, ShowMCInst)
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MCOPT(bool, FatalWarnings)
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MCOPT(bool, NoWarn)
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MCOPT(bool, NoDeprecatedWarn)
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MCOPT(bool, NoTypeCheck)
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MCOPT(std::string, ABIName)
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llvm::mc::RegisterMCTargetOptionsFlags::RegisterMCTargetOptionsFlags() {
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#define MCBINDOPT(NAME) \
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do { \
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NAME##View = std::addressof(NAME); \
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} while (0)
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static cl::opt<bool> RelaxAll(
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"mc-relax-all", cl::desc("When used with filetype=obj, relax all fixups "
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"in the emitted object file"));
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MCBINDOPT(RelaxAll);
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static cl::opt<bool> IncrementalLinkerCompatible(
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"incremental-linker-compatible",
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cl::desc(
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"When used with filetype=obj, "
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"emit an object file which can be used with an incremental linker"));
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MCBINDOPT(IncrementalLinkerCompatible);
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static cl::opt<int> DwarfVersion("dwarf-version", cl::desc("Dwarf version"),
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cl::init(0));
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MCBINDOPT(DwarfVersion);
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static cl::opt<bool> Dwarf64(
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"dwarf64",
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cl::desc("Generate debugging info in the 64-bit DWARF format"));
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MCBINDOPT(Dwarf64);
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static cl::opt<bool> ShowMCInst(
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"asm-show-inst",
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cl::desc("Emit internal instruction representation to assembly file"));
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MCBINDOPT(ShowMCInst);
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static cl::opt<bool> FatalWarnings("fatal-warnings",
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cl::desc("Treat warnings as errors"));
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MCBINDOPT(FatalWarnings);
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static cl::opt<bool> NoWarn("no-warn", cl::desc("Suppress all warnings"));
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static cl::alias NoWarnW("W", cl::desc("Alias for --no-warn"),
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cl::aliasopt(NoWarn));
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MCBINDOPT(NoWarn);
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static cl::opt<bool> NoDeprecatedWarn(
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"no-deprecated-warn", cl::desc("Suppress all deprecated warnings"));
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MCBINDOPT(NoDeprecatedWarn);
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static cl::opt<bool> NoTypeCheck(
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"no-type-check", cl::desc("Suppress type errors (Wasm)"));
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MCBINDOPT(NoTypeCheck);
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static cl::opt<std::string> ABIName(
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"target-abi", cl::Hidden,
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cl::desc("The name of the ABI to be targeted from the backend."),
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cl::init(""));
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MCBINDOPT(ABIName);
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#undef MCBINDOPT
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}
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MCTargetOptions llvm::mc::InitMCTargetOptionsFromFlags() {
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MCTargetOptions Options;
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Options.MCRelaxAll = getRelaxAll();
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Options.MCIncrementalLinkerCompatible = getIncrementalLinkerCompatible();
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Options.Dwarf64 = getDwarf64();
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Options.DwarfVersion = getDwarfVersion();
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Options.ShowMCInst = getShowMCInst();
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Options.ABIName = getABIName();
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Options.MCFatalWarnings = getFatalWarnings();
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Options.MCNoWarn = getNoWarn();
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Options.MCNoDeprecatedWarn = getNoDeprecatedWarn();
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Options.MCNoTypeCheck = getNoTypeCheck();
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return Options;
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}
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