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cd269fee05
This both reapplies #118734, the initial attempt at this, and updates it significantly. First, it uses the newly added `StringTable` abstraction for string tables, and simplifies the construction to build the string table and info arrays separately. This should reduce any `constexpr` compile time memory or CPU cost of the original PR while significantly improving the APIs throughout. It also restructures the builtins to support sharding across several independent tables. This accomplishes two improvements from the original PR: 1) It improves the APIs used significantly. 2) When builtins are defined from different sources (like SVE vs MVE in AArch64), this allows each of them to build their own string table independently rather than having to merge the string tables and info structures. 3) It allows each shard to factor out a common prefix, often cutting the size of the strings needed for the builtins by a factor two. The second point is important both to allow different mechanisms of construction (for example a `.def` file and a tablegen'ed `.inc` file, or different tablegen'ed `.inc files), it also simply reduces the sizes of these tables which is valuable given how large they are in some cases. The third builds on that size reduction. Initially, we use this new sharding rather than merging tables in AArch64, LoongArch, RISCV, and X86. Mostly this helps ensure the system works, as without further changes these still push scaling limits. Subsequent commits will more deeply leverage the new structure, including using the prefix capabilities which cannot be easily factored out here and requires deep changes to the targets.
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
//===--- M68k.h - Declare M68k target feature support -------*- 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 declares M68k TargetInfo objects.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_M68K_H
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#define LLVM_CLANG_LIB_BASIC_TARGETS_M68K_H
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#include "OSTargets.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Basic/TargetOptions.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/TargetParser/Triple.h"
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#include <optional>
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namespace clang {
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namespace targets {
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class LLVM_LIBRARY_VISIBILITY M68kTargetInfo : public TargetInfo {
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static const char *const GCCRegNames[];
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static const TargetInfo::GCCRegAlias GCCRegAliases[];
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enum CPUKind {
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CK_Unknown,
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CK_68000,
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CK_68010,
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CK_68020,
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CK_68030,
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CK_68040,
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CK_68060
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} CPU = CK_Unknown;
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const TargetOptions &TargetOpts;
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public:
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M68kTargetInfo(const llvm::Triple &Triple, const TargetOptions &);
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void getTargetDefines(const LangOptions &Opts,
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MacroBuilder &Builder) const override;
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llvm::SmallVector<Builtin::InfosShard> getTargetBuiltins() const override;
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bool hasFeature(StringRef Feature) const override;
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ArrayRef<const char *> getGCCRegNames() const override;
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ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
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std::string convertConstraint(const char *&Constraint) const override;
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bool validateAsmConstraint(const char *&Name,
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TargetInfo::ConstraintInfo &info) const override;
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std::optional<std::string> handleAsmEscapedChar(char EscChar) const override;
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std::string_view getClobbers() const override;
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BuiltinVaListKind getBuiltinVaListKind() const override;
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bool setCPU(const std::string &Name) override;
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CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
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std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
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return std::make_pair(32, 32);
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}
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};
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} // namespace targets
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} // namespace clang
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#endif
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