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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
119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
//===- llvm/CodeGen/MachineModuleInfoImpls.h --------------------*- C++ -*-===//
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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 defines object-file format specific implementations of
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// MachineModuleInfoImpl.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
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#define LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include <cassert>
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namespace llvm {
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class MCSymbol;
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/// MachineModuleInfoMachO - This is a MachineModuleInfoImpl implementation
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/// for MachO targets.
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class MachineModuleInfoMachO : public MachineModuleInfoImpl {
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/// GVStubs - Darwin '$non_lazy_ptr' stubs. The key is something like
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/// "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra bit
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/// is true if this GV is external.
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DenseMap<MCSymbol *, StubValueTy> GVStubs;
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/// ThreadLocalGVStubs - Darwin '$non_lazy_ptr' stubs. The key is something
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/// like "Lfoo$non_lazy_ptr", the value is something like "_foo". The extra
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/// bit is true if this GV is external.
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DenseMap<MCSymbol *, StubValueTy> ThreadLocalGVStubs;
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virtual void anchor(); // Out of line virtual method.
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public:
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MachineModuleInfoMachO(const MachineModuleInfo &) {}
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StubValueTy &getGVStubEntry(MCSymbol *Sym) {
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assert(Sym && "Key cannot be null");
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return GVStubs[Sym];
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}
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StubValueTy &getThreadLocalGVStubEntry(MCSymbol *Sym) {
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assert(Sym && "Key cannot be null");
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return ThreadLocalGVStubs[Sym];
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}
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/// Accessor methods to return the set of stubs in sorted order.
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SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
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SymbolListTy GetThreadLocalGVStubList() {
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return getSortedStubs(ThreadLocalGVStubs);
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}
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};
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/// MachineModuleInfoELF - This is a MachineModuleInfoImpl implementation
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/// for ELF targets.
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class MachineModuleInfoELF : public MachineModuleInfoImpl {
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/// GVStubs - These stubs are used to materialize global addresses in PIC
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/// mode.
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DenseMap<MCSymbol *, StubValueTy> GVStubs;
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virtual void anchor(); // Out of line virtual method.
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public:
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MachineModuleInfoELF(const MachineModuleInfo &) {}
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StubValueTy &getGVStubEntry(MCSymbol *Sym) {
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assert(Sym && "Key cannot be null");
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return GVStubs[Sym];
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}
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/// Accessor methods to return the set of stubs in sorted order.
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SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
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};
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/// MachineModuleInfoCOFF - This is a MachineModuleInfoImpl implementation
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/// for COFF targets.
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class MachineModuleInfoCOFF : public MachineModuleInfoImpl {
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/// GVStubs - These stubs are used to materialize global addresses in PIC
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/// mode.
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DenseMap<MCSymbol *, StubValueTy> GVStubs;
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virtual void anchor(); // Out of line virtual method.
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public:
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MachineModuleInfoCOFF(const MachineModuleInfo &) {}
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StubValueTy &getGVStubEntry(MCSymbol *Sym) {
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assert(Sym && "Key cannot be null");
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return GVStubs[Sym];
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}
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/// Accessor methods to return the set of stubs in sorted order.
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SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
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};
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/// MachineModuleInfoWasm - This is a MachineModuleInfoImpl implementation
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/// for Wasm targets.
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class MachineModuleInfoWasm : public MachineModuleInfoImpl {
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virtual void anchor(); // Out of line virtual method.
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public:
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MachineModuleInfoWasm(const MachineModuleInfo &) {}
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StringSet<> MachineSymbolsUsed;
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};
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} // end namespace llvm
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#endif // LLVM_CODEGEN_MACHINEMODULEINFOIMPLS_H
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