d9ab3e82f3
This avoids recomputing string length that is already known at compile time. It has a slight impact on preprocessing / compile time, see https://llvm-compile-time-tracker.com/compare.php?from=3f36d2d579d8b0e8824d9dd99bfa79f456858f88&to=e49640c507ddc6615b5e503144301c8e41f8f434&stat=instructions:u This a recommit of e953ae5bbc313fd0cc980ce021d487e5b5199ea4 and the subsequent fixes caa713559bd38f337d7d35de35686775e8fb5175 and 06b90e2e9c991e211fecc97948e533320a825470. The above patchset caused some version of GCC to take eons to compile clang/lib/Basic/Targets/AArch64.cpp, as spotted in aa171833ab0017d9732e82b8682c9848ab25ff9e. The fix is to make BuiltinInfo tables a compilation unit static variable, instead of a private static variable. Differential Revision: https://reviews.llvm.org/D139881
120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
//===--- BPF.h - Declare BPF 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 BPF TargetInfo objects.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
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#define LLVM_CLANG_LIB_BASIC_TARGETS_BPF_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/ADT/Triple.h"
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#include "llvm/Support/Compiler.h"
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namespace clang {
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namespace targets {
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class LLVM_LIBRARY_VISIBILITY BPFTargetInfo : public TargetInfo {
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bool HasAlu32 = false;
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public:
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BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
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: TargetInfo(Triple) {
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LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
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SizeType = UnsignedLong;
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PtrDiffType = SignedLong;
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IntPtrType = SignedLong;
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IntMaxType = SignedLong;
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Int64Type = SignedLong;
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RegParmMax = 5;
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if (Triple.getArch() == llvm::Triple::bpfeb) {
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resetDataLayout("E-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
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} else {
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resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
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}
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MaxAtomicPromoteWidth = 64;
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MaxAtomicInlineWidth = 64;
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TLSSupported = false;
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}
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void getTargetDefines(const LangOptions &Opts,
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MacroBuilder &Builder) const override;
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bool hasFeature(StringRef Feature) const override {
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return Feature == "bpf" || Feature == "alu32" || Feature == "dwarfris";
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}
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void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
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bool Enabled) const override {
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Features[Name] = Enabled;
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}
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bool handleTargetFeatures(std::vector<std::string> &Features,
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DiagnosticsEngine &Diags) override;
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ArrayRef<Builtin::Info> getTargetBuiltins() const override;
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const char *getClobbers() const override { return ""; }
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BuiltinVaListKind getBuiltinVaListKind() const override {
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return TargetInfo::VoidPtrBuiltinVaList;
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}
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bool isValidGCCRegisterName(StringRef Name) const override { return true; }
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ArrayRef<const char *> getGCCRegNames() const override {
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return std::nullopt;
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}
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bool validateAsmConstraint(const char *&Name,
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TargetInfo::ConstraintInfo &Info) const override {
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switch (*Name) {
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default:
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break;
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case 'w':
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if (HasAlu32) {
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Info.setAllowsRegister();
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}
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break;
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}
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return true;
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}
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ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
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return std::nullopt;
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}
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bool allowDebugInfoForExternalRef() const override { return true; }
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CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
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switch (CC) {
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default:
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return CCCR_Warning;
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case CC_C:
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case CC_OpenCLKernel:
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return CCCR_OK;
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}
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}
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bool isValidCPUName(StringRef Name) const override;
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void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
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bool setCPU(const std::string &Name) override {
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if (Name == "v3") {
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HasAlu32 = true;
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}
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StringRef CPUName(Name);
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return isValidCPUName(CPUName);
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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 // LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
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