diff --git a/contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/AArch64.cpp b/contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/AArch64.cpp index ed8c7e94b013..0e354a49b59a 100644 --- a/contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/AArch64.cpp +++ b/contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/AArch64.cpp @@ -1,522 +1,529 @@ //===--- AArch64.cpp - AArch64 (not ARM) Helpers for Tools ------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "AArch64.h" #include "clang/Driver/Driver.h" #include "clang/Driver/DriverDiagnostic.h" #include "clang/Driver/Options.h" #include "llvm/Option/ArgList.h" #include "llvm/Support/TargetParser.h" #include "llvm/Support/Host.h" using namespace clang::driver; using namespace clang::driver::tools; using namespace clang; using namespace llvm::opt; /// \returns true if the given triple can determine the default CPU type even /// if -arch is not specified. static bool isCPUDeterminedByTriple(const llvm::Triple &Triple) { return Triple.isOSDarwin(); } /// getAArch64TargetCPU - Get the (LLVM) name of the AArch64 cpu we are /// targeting. Set \p A to the Arg corresponding to the -mcpu argument if it is /// provided, or to nullptr otherwise. std::string aarch64::getAArch64TargetCPU(const ArgList &Args, const llvm::Triple &Triple, Arg *&A) { std::string CPU; // If we have -mcpu, use that. if ((A = Args.getLastArg(options::OPT_mcpu_EQ))) { StringRef Mcpu = A->getValue(); CPU = Mcpu.split("+").first.lower(); } // Handle CPU name is 'native'. if (CPU == "native") return std::string(llvm::sys::getHostCPUName()); if (CPU.size()) return CPU; if (Triple.isTargetMachineMac() && Triple.getArch() == llvm::Triple::aarch64) { // Apple Silicon macs default to M1 CPUs. return "apple-m1"; } // arm64e requires v8.3a and only runs on apple-a12 and later CPUs. if (Triple.isArm64e()) return "apple-a12"; // Make sure we pick the appropriate Apple CPU if -arch is used or when // targetting a Darwin OS. if (Args.getLastArg(options::OPT_arch) || Triple.isOSDarwin()) return Triple.getArch() == llvm::Triple::aarch64_32 ? "apple-s4" : "apple-a7"; return "generic"; } // Decode AArch64 features from string like +[no]featureA+[no]featureB+... static bool DecodeAArch64Features(const Driver &D, StringRef text, std::vector &Features, llvm::AArch64::ArchKind ArchKind) { SmallVector Split; text.split(Split, StringRef("+"), -1, false); for (StringRef Feature : Split) { StringRef FeatureName = llvm::AArch64::getArchExtFeature(Feature); if (!FeatureName.empty()) Features.push_back(FeatureName); else if (Feature == "neon" || Feature == "noneon") D.Diag(clang::diag::err_drv_no_neon_modifier); else return false; // +sve implies +f32mm if the base architecture is v8.6A or v8.7A // it isn't the case in general that sve implies both f64mm and f32mm if ((ArchKind == llvm::AArch64::ArchKind::ARMV8_6A || ArchKind == llvm::AArch64::ArchKind::ARMV8_7A) && Feature == "sve") Features.push_back("+f32mm"); } return true; } // Check if the CPU name and feature modifiers in -mcpu are legal. If yes, // decode CPU and feature. static bool DecodeAArch64Mcpu(const Driver &D, StringRef Mcpu, StringRef &CPU, std::vector &Features) { std::pair Split = Mcpu.split("+"); CPU = Split.first; llvm::AArch64::ArchKind ArchKind = llvm::AArch64::ArchKind::ARMV8A; if (CPU == "native") CPU = llvm::sys::getHostCPUName(); if (CPU == "generic") { Features.push_back("+neon"); } else { ArchKind = llvm::AArch64::parseCPUArch(CPU); if (!llvm::AArch64::getArchFeatures(ArchKind, Features)) return false; uint64_t Extension = llvm::AArch64::getDefaultExtensions(CPU, ArchKind); if (!llvm::AArch64::getExtensionFeatures(Extension, Features)) return false; } if (Split.second.size() && !DecodeAArch64Features(D, Split.second, Features, ArchKind)) return false; return true; } static bool getAArch64ArchFeaturesFromMarch(const Driver &D, StringRef March, const ArgList &Args, std::vector &Features) { std::string MarchLowerCase = March.lower(); std::pair Split = StringRef(MarchLowerCase).split("+"); llvm::AArch64::ArchKind ArchKind = llvm::AArch64::parseArch(Split.first); if (ArchKind == llvm::AArch64::ArchKind::INVALID || !llvm::AArch64::getArchFeatures(ArchKind, Features) || (Split.second.size() && !DecodeAArch64Features(D, Split.second, Features, ArchKind))) return false; return true; } static bool getAArch64ArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu, const ArgList &Args, std::vector &Features) { StringRef CPU; std::string McpuLowerCase = Mcpu.lower(); if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, Features)) return false; return true; } static bool getAArch64MicroArchFeaturesFromMtune(const Driver &D, StringRef Mtune, const ArgList &Args, std::vector &Features) { std::string MtuneLowerCase = Mtune.lower(); // Check CPU name is valid std::vector MtuneFeatures; StringRef Tune; if (!DecodeAArch64Mcpu(D, MtuneLowerCase, Tune, MtuneFeatures)) return false; // Handle CPU name is 'native'. if (MtuneLowerCase == "native") MtuneLowerCase = std::string(llvm::sys::getHostCPUName()); if (MtuneLowerCase == "cyclone" || StringRef(MtuneLowerCase).startswith("apple")) { Features.push_back("+zcm"); Features.push_back("+zcz"); } return true; } static bool getAArch64MicroArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu, const ArgList &Args, std::vector &Features) { StringRef CPU; std::vector DecodedFeature; std::string McpuLowerCase = Mcpu.lower(); if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, DecodedFeature)) return false; return getAArch64MicroArchFeaturesFromMtune(D, CPU, Args, Features); } void aarch64::getAArch64TargetFeatures(const Driver &D, const llvm::Triple &Triple, const ArgList &Args, std::vector &Features, bool ForAS) { Arg *A; bool success = true; // Enable NEON by default. Features.push_back("+neon"); - llvm::StringRef WaMArch = ""; + llvm::StringRef WaMArch; if (ForAS) for (const auto *A : Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) for (StringRef Value : A->getValues()) if (Value.startswith("-march=")) WaMArch = Value.substr(7); // Call getAArch64ArchFeaturesFromMarch only if "-Wa,-march=" or // "-Xassembler -march" is detected. Otherwise it may return false // and causes Clang to error out. - if (WaMArch.size()) + if (!WaMArch.empty()) success = getAArch64ArchFeaturesFromMarch(D, WaMArch, Args, Features); else if ((A = Args.getLastArg(options::OPT_march_EQ))) success = getAArch64ArchFeaturesFromMarch(D, A->getValue(), Args, Features); else if ((A = Args.getLastArg(options::OPT_mcpu_EQ))) success = getAArch64ArchFeaturesFromMcpu(D, A->getValue(), Args, Features); else if (Args.hasArg(options::OPT_arch) || isCPUDeterminedByTriple(Triple)) success = getAArch64ArchFeaturesFromMcpu( D, getAArch64TargetCPU(Args, Triple, A), Args, Features); if (success && (A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ))) success = getAArch64MicroArchFeaturesFromMtune(D, A->getValue(), Args, Features); else if (success && (A = Args.getLastArg(options::OPT_mcpu_EQ))) success = getAArch64MicroArchFeaturesFromMcpu(D, A->getValue(), Args, Features); else if (success && (Args.hasArg(options::OPT_arch) || isCPUDeterminedByTriple(Triple))) success = getAArch64MicroArchFeaturesFromMcpu( D, getAArch64TargetCPU(Args, Triple, A), Args, Features); - if (!success) - D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args); + if (!success) { + auto Diag = D.Diag(diag::err_drv_clang_unsupported); + // If "-Wa,-march=" is used, 'WaMArch' will contain the argument's value, + // while 'A' is uninitialized. Only dereference 'A' in the other case. + if (!WaMArch.empty()) + Diag << "-march=" + WaMArch.str(); + else + Diag << A->getAsString(Args); + } if (Args.getLastArg(options::OPT_mgeneral_regs_only)) { Features.push_back("-fp-armv8"); Features.push_back("-crypto"); Features.push_back("-neon"); } if (Arg *A = Args.getLastArg(options::OPT_mtp_mode_EQ)) { StringRef Mtp = A->getValue(); if (Mtp == "el3") Features.push_back("+tpidr-el3"); else if (Mtp == "el2") Features.push_back("+tpidr-el2"); else if (Mtp == "el1") Features.push_back("+tpidr-el1"); else if (Mtp != "el0") D.Diag(diag::err_drv_invalid_mtp) << A->getAsString(Args); } // Enable/disable straight line speculation hardening. if (Arg *A = Args.getLastArg(options::OPT_mharden_sls_EQ)) { StringRef Scope = A->getValue(); bool EnableRetBr = false; bool EnableBlr = false; bool DisableComdat = false; if (Scope != "none") { SmallVector Opts; Scope.split(Opts, ","); for (auto Opt : Opts) { Opt = Opt.trim(); if (Opt == "all") { EnableBlr = true; EnableRetBr = true; continue; } if (Opt == "retbr") { EnableRetBr = true; continue; } if (Opt == "blr") { EnableBlr = true; continue; } if (Opt == "comdat") { DisableComdat = false; continue; } if (Opt == "nocomdat") { DisableComdat = true; continue; } D.Diag(diag::err_invalid_sls_hardening) << Scope << A->getAsString(Args); break; } } if (EnableRetBr) Features.push_back("+harden-sls-retbr"); if (EnableBlr) Features.push_back("+harden-sls-blr"); if (DisableComdat) { Features.push_back("+harden-sls-nocomdat"); } } // En/disable crc if (Arg *A = Args.getLastArg(options::OPT_mcrc, options::OPT_mnocrc)) { if (A->getOption().matches(options::OPT_mcrc)) Features.push_back("+crc"); else Features.push_back("-crc"); } // Handle (arch-dependent) fp16fml/fullfp16 relationship. // FIXME: this fp16fml option handling will be reimplemented after the // TargetParser rewrite. const auto ItRNoFullFP16 = std::find(Features.rbegin(), Features.rend(), "-fullfp16"); const auto ItRFP16FML = std::find(Features.rbegin(), Features.rend(), "+fp16fml"); if (llvm::is_contained(Features, "+v8.4a")) { const auto ItRFullFP16 = std::find(Features.rbegin(), Features.rend(), "+fullfp16"); if (ItRFullFP16 < ItRNoFullFP16 && ItRFullFP16 < ItRFP16FML) { // Only entangled feature that can be to the right of this +fullfp16 is -fp16fml. // Only append the +fp16fml if there is no -fp16fml after the +fullfp16. if (std::find(Features.rbegin(), ItRFullFP16, "-fp16fml") == ItRFullFP16) Features.push_back("+fp16fml"); } else goto fp16_fml_fallthrough; } else { fp16_fml_fallthrough: // In both of these cases, putting the 'other' feature on the end of the vector will // result in the same effect as placing it immediately after the current feature. if (ItRNoFullFP16 < ItRFP16FML) Features.push_back("-fp16fml"); else if (ItRNoFullFP16 > ItRFP16FML) Features.push_back("+fullfp16"); } // FIXME: this needs reimplementation too after the TargetParser rewrite // // Context sensitive meaning of Crypto: // 1) For Arch >= ARMv8.4a: crypto = sm4 + sha3 + sha2 + aes // 2) For Arch <= ARMv8.3a: crypto = sha2 + aes const auto ItBegin = Features.begin(); const auto ItEnd = Features.end(); const auto ItRBegin = Features.rbegin(); const auto ItREnd = Features.rend(); const auto ItRCrypto = std::find(ItRBegin, ItREnd, "+crypto"); const auto ItRNoCrypto = std::find(ItRBegin, ItREnd, "-crypto"); const auto HasCrypto = ItRCrypto != ItREnd; const auto HasNoCrypto = ItRNoCrypto != ItREnd; const ptrdiff_t PosCrypto = ItRCrypto - ItRBegin; const ptrdiff_t PosNoCrypto = ItRNoCrypto - ItRBegin; bool NoCrypto = false; if (HasCrypto && HasNoCrypto) { if (PosNoCrypto < PosCrypto) NoCrypto = true; } if (std::find(ItBegin, ItEnd, "+v8.4a") != ItEnd) { if (HasCrypto && !NoCrypto) { // Check if we have NOT disabled an algorithm with something like: // +crypto, -algorithm // And if "-algorithm" does not occur, we enable that crypto algorithm. const bool HasSM4 = (std::find(ItBegin, ItEnd, "-sm4") == ItEnd); const bool HasSHA3 = (std::find(ItBegin, ItEnd, "-sha3") == ItEnd); const bool HasSHA2 = (std::find(ItBegin, ItEnd, "-sha2") == ItEnd); const bool HasAES = (std::find(ItBegin, ItEnd, "-aes") == ItEnd); if (HasSM4) Features.push_back("+sm4"); if (HasSHA3) Features.push_back("+sha3"); if (HasSHA2) Features.push_back("+sha2"); if (HasAES) Features.push_back("+aes"); } else if (HasNoCrypto) { // Check if we have NOT enabled a crypto algorithm with something like: // -crypto, +algorithm // And if "+algorithm" does not occur, we disable that crypto algorithm. const bool HasSM4 = (std::find(ItBegin, ItEnd, "+sm4") != ItEnd); const bool HasSHA3 = (std::find(ItBegin, ItEnd, "+sha3") != ItEnd); const bool HasSHA2 = (std::find(ItBegin, ItEnd, "+sha2") != ItEnd); const bool HasAES = (std::find(ItBegin, ItEnd, "+aes") != ItEnd); if (!HasSM4) Features.push_back("-sm4"); if (!HasSHA3) Features.push_back("-sha3"); if (!HasSHA2) Features.push_back("-sha2"); if (!HasAES) Features.push_back("-aes"); } } else { if (HasCrypto && !NoCrypto) { const bool HasSHA2 = (std::find(ItBegin, ItEnd, "-sha2") == ItEnd); const bool HasAES = (std::find(ItBegin, ItEnd, "-aes") == ItEnd); if (HasSHA2) Features.push_back("+sha2"); if (HasAES) Features.push_back("+aes"); } else if (HasNoCrypto) { const bool HasSHA2 = (std::find(ItBegin, ItEnd, "+sha2") != ItEnd); const bool HasAES = (std::find(ItBegin, ItEnd, "+aes") != ItEnd); const bool HasV82a = (std::find(ItBegin, ItEnd, "+v8.2a") != ItEnd); const bool HasV83a = (std::find(ItBegin, ItEnd, "+v8.3a") != ItEnd); const bool HasV84a = (std::find(ItBegin, ItEnd, "+v8.4a") != ItEnd); if (!HasSHA2) Features.push_back("-sha2"); if (!HasAES) Features.push_back("-aes"); if (HasV82a || HasV83a || HasV84a) { Features.push_back("-sm4"); Features.push_back("-sha3"); } } } auto V8_6Pos = llvm::find(Features, "+v8.6a"); if (V8_6Pos != std::end(Features)) V8_6Pos = Features.insert(std::next(V8_6Pos), {"+i8mm", "+bf16"}); if (Arg *A = Args.getLastArg(options::OPT_mno_unaligned_access, options::OPT_munaligned_access)) { if (A->getOption().matches(options::OPT_mno_unaligned_access)) Features.push_back("+strict-align"); } else if (Triple.isOSOpenBSD()) Features.push_back("+strict-align"); if (Args.hasArg(options::OPT_ffixed_x1)) Features.push_back("+reserve-x1"); if (Args.hasArg(options::OPT_ffixed_x2)) Features.push_back("+reserve-x2"); if (Args.hasArg(options::OPT_ffixed_x3)) Features.push_back("+reserve-x3"); if (Args.hasArg(options::OPT_ffixed_x4)) Features.push_back("+reserve-x4"); if (Args.hasArg(options::OPT_ffixed_x5)) Features.push_back("+reserve-x5"); if (Args.hasArg(options::OPT_ffixed_x6)) Features.push_back("+reserve-x6"); if (Args.hasArg(options::OPT_ffixed_x7)) Features.push_back("+reserve-x7"); if (Args.hasArg(options::OPT_ffixed_x9)) Features.push_back("+reserve-x9"); if (Args.hasArg(options::OPT_ffixed_x10)) Features.push_back("+reserve-x10"); if (Args.hasArg(options::OPT_ffixed_x11)) Features.push_back("+reserve-x11"); if (Args.hasArg(options::OPT_ffixed_x12)) Features.push_back("+reserve-x12"); if (Args.hasArg(options::OPT_ffixed_x13)) Features.push_back("+reserve-x13"); if (Args.hasArg(options::OPT_ffixed_x14)) Features.push_back("+reserve-x14"); if (Args.hasArg(options::OPT_ffixed_x15)) Features.push_back("+reserve-x15"); if (Args.hasArg(options::OPT_ffixed_x18)) Features.push_back("+reserve-x18"); if (Args.hasArg(options::OPT_ffixed_x20)) Features.push_back("+reserve-x20"); if (Args.hasArg(options::OPT_ffixed_x21)) Features.push_back("+reserve-x21"); if (Args.hasArg(options::OPT_ffixed_x22)) Features.push_back("+reserve-x22"); if (Args.hasArg(options::OPT_ffixed_x23)) Features.push_back("+reserve-x23"); if (Args.hasArg(options::OPT_ffixed_x24)) Features.push_back("+reserve-x24"); if (Args.hasArg(options::OPT_ffixed_x25)) Features.push_back("+reserve-x25"); if (Args.hasArg(options::OPT_ffixed_x26)) Features.push_back("+reserve-x26"); if (Args.hasArg(options::OPT_ffixed_x27)) Features.push_back("+reserve-x27"); if (Args.hasArg(options::OPT_ffixed_x28)) Features.push_back("+reserve-x28"); if (Args.hasArg(options::OPT_ffixed_x30)) Features.push_back("+reserve-x30"); if (Args.hasArg(options::OPT_fcall_saved_x8)) Features.push_back("+call-saved-x8"); if (Args.hasArg(options::OPT_fcall_saved_x9)) Features.push_back("+call-saved-x9"); if (Args.hasArg(options::OPT_fcall_saved_x10)) Features.push_back("+call-saved-x10"); if (Args.hasArg(options::OPT_fcall_saved_x11)) Features.push_back("+call-saved-x11"); if (Args.hasArg(options::OPT_fcall_saved_x12)) Features.push_back("+call-saved-x12"); if (Args.hasArg(options::OPT_fcall_saved_x13)) Features.push_back("+call-saved-x13"); if (Args.hasArg(options::OPT_fcall_saved_x14)) Features.push_back("+call-saved-x14"); if (Args.hasArg(options::OPT_fcall_saved_x15)) Features.push_back("+call-saved-x15"); if (Args.hasArg(options::OPT_fcall_saved_x18)) Features.push_back("+call-saved-x18"); if (Args.hasArg(options::OPT_mno_neg_immediates)) Features.push_back("+no-neg-immediates"); }