212ecb9d5c
This moves the main builtins and several targets to use nice generated string tables and info structures rather than X-macros. Even without obvious prefixes factored out, the resulting tables are significantly smaller and much cheaper to compile with out all the X-macro overhead. This leaves the X-macros in place for atomic builtins which have a wide range of uses that don't seem reasonable to fold into TableGen. As future work, these should move to their own file (whether as X-macros or just generated patterns) so the AST headers don't have to include all the data for other builtins.
107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
//===--- BPF.cpp - Implement BPF target feature support -------------------===//
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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 implements BPF TargetInfo objects.
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//
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//===----------------------------------------------------------------------===//
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#include "BPF.h"
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#include "Targets.h"
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#include "clang/Basic/MacroBuilder.h"
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#include "clang/Basic/TargetBuiltins.h"
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#include "llvm/ADT/StringRef.h"
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using namespace clang;
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using namespace clang::targets;
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static constexpr int NumBuiltins =
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clang::BPF::LastTSBuiltin - Builtin::FirstTSBuiltin;
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#define GET_BUILTIN_STR_TABLE
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#include "clang/Basic/BuiltinsBPF.inc"
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#undef GET_BUILTIN_STR_TABLE
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static constexpr Builtin::Info BuiltinInfos[] = {
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#define GET_BUILTIN_INFOS
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#include "clang/Basic/BuiltinsBPF.inc"
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#undef GET_BUILTIN_INFOS
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};
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static_assert(std::size(BuiltinInfos) == NumBuiltins);
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void BPFTargetInfo::getTargetDefines(const LangOptions &Opts,
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MacroBuilder &Builder) const {
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Builder.defineMacro("__bpf__");
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Builder.defineMacro("__BPF__");
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std::string CPU = getTargetOpts().CPU;
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if (CPU == "probe") {
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Builder.defineMacro("__BPF_CPU_VERSION__", "0");
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return;
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}
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Builder.defineMacro("__BPF_FEATURE_ADDR_SPACE_CAST");
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Builder.defineMacro("__BPF_FEATURE_MAY_GOTO");
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Builder.defineMacro("__BPF_FEATURE_ATOMIC_MEM_ORDERING");
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if (CPU.empty())
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CPU = "v3";
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if (CPU == "generic" || CPU == "v1") {
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Builder.defineMacro("__BPF_CPU_VERSION__", "1");
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return;
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}
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std::string CpuVerNumStr = CPU.substr(1);
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Builder.defineMacro("__BPF_CPU_VERSION__", CpuVerNumStr);
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int CpuVerNum = std::stoi(CpuVerNumStr);
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if (CpuVerNum >= 2)
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Builder.defineMacro("__BPF_FEATURE_JMP_EXT");
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if (CpuVerNum >= 3) {
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Builder.defineMacro("__BPF_FEATURE_JMP32");
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Builder.defineMacro("__BPF_FEATURE_ALU32");
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}
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if (CpuVerNum >= 4) {
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Builder.defineMacro("__BPF_FEATURE_LDSX");
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Builder.defineMacro("__BPF_FEATURE_MOVSX");
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Builder.defineMacro("__BPF_FEATURE_BSWAP");
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Builder.defineMacro("__BPF_FEATURE_SDIV_SMOD");
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Builder.defineMacro("__BPF_FEATURE_GOTOL");
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Builder.defineMacro("__BPF_FEATURE_ST");
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}
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}
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static constexpr llvm::StringLiteral ValidCPUNames[] = {"generic", "v1", "v2",
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"v3", "v4", "probe"};
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bool BPFTargetInfo::isValidCPUName(StringRef Name) const {
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return llvm::is_contained(ValidCPUNames, Name);
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}
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void BPFTargetInfo::fillValidCPUList(SmallVectorImpl<StringRef> &Values) const {
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Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames));
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}
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llvm::SmallVector<Builtin::InfosShard>
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BPFTargetInfo::getTargetBuiltins() const {
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return {{&BuiltinStrings, BuiltinInfos}};
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}
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bool BPFTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
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DiagnosticsEngine &Diags) {
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for (const auto &Feature : Features) {
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if (Feature == "+alu32") {
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HasAlu32 = true;
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}
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}
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return true;
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}
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