327 lines
10 KiB
C++
327 lines
10 KiB
C++
//===-- Flang.cpp - Flang+LLVM ToolChain Implementations --------*- 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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#include "Flang.h"
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#include "CommonArgs.h"
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#include "clang/Driver/Options.h"
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#include <cassert>
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using namespace clang::driver;
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using namespace clang::driver::tools;
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using namespace clang;
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using namespace llvm::opt;
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/// Add -x lang to \p CmdArgs for \p Input.
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static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
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ArgStringList &CmdArgs) {
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CmdArgs.push_back("-x");
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// Map the driver type to the frontend type.
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CmdArgs.push_back(types::getTypeName(Input.getType()));
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}
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void Flang::addFortranDialectOptions(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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Args.AddAllArgs(
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CmdArgs, {options::OPT_ffixed_form, options::OPT_ffree_form,
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options::OPT_ffixed_line_length_EQ, options::OPT_fopenmp,
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options::OPT_fopenacc, options::OPT_finput_charset_EQ,
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options::OPT_fimplicit_none, options::OPT_fno_implicit_none,
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options::OPT_fbackslash, options::OPT_fno_backslash,
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options::OPT_flogical_abbreviations,
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options::OPT_fno_logical_abbreviations,
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options::OPT_fxor_operator, options::OPT_fno_xor_operator,
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options::OPT_falternative_parameter_statement,
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options::OPT_fdefault_real_8, options::OPT_fdefault_integer_8,
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options::OPT_fdefault_double_8, options::OPT_flarge_sizes,
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options::OPT_fno_automatic});
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}
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void Flang::addPreprocessingOptions(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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Args.AddAllArgs(CmdArgs,
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{options::OPT_P, options::OPT_D, options::OPT_U,
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options::OPT_I, options::OPT_cpp, options::OPT_nocpp});
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}
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void Flang::addOtherOptions(const ArgList &Args, ArgStringList &CmdArgs) const {
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Args.AddAllArgs(CmdArgs,
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{options::OPT_module_dir, options::OPT_fdebug_module_writer,
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options::OPT_fintrinsic_modules_path, options::OPT_pedantic,
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options::OPT_std_EQ, options::OPT_W_Joined,
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options::OPT_fconvert_EQ, options::OPT_fpass_plugin_EQ});
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}
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void Flang::addPicOptions(const ArgList &Args, ArgStringList &CmdArgs) const {
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// ParsePICArgs parses -fPIC/-fPIE and their variants and returns a tuple of
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// (RelocationModel, PICLevel, IsPIE).
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llvm::Reloc::Model RelocationModel;
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unsigned PICLevel;
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bool IsPIE;
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std::tie(RelocationModel, PICLevel, IsPIE) =
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ParsePICArgs(getToolChain(), Args);
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if (auto *RMName = RelocationModelName(RelocationModel)) {
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CmdArgs.push_back("-mrelocation-model");
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CmdArgs.push_back(RMName);
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}
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if (PICLevel > 0) {
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CmdArgs.push_back("-pic-level");
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CmdArgs.push_back(PICLevel == 1 ? "1" : "2");
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if (IsPIE)
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CmdArgs.push_back("-pic-is-pie");
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}
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}
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void Flang::addTargetOptions(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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const ToolChain &TC = getToolChain();
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const llvm::Triple &Triple = TC.getEffectiveTriple();
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const Driver &D = TC.getDriver();
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std::string CPU = getCPUName(D, Args, Triple);
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if (!CPU.empty()) {
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CmdArgs.push_back("-target-cpu");
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CmdArgs.push_back(Args.MakeArgString(CPU));
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}
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// Add the target features.
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switch (TC.getArch()) {
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default:
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break;
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case llvm::Triple::aarch64:
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[[fallthrough]];
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case llvm::Triple::x86_64:
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getTargetFeatures(D, Triple, Args, CmdArgs, /*ForAs*/ false);
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break;
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}
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// TODO: Add target specific flags, ABI, mtune option etc.
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}
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static void addFloatingPointOptions(const Driver &D, const ArgList &Args,
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ArgStringList &CmdArgs) {
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StringRef FPContract;
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bool HonorINFs = true;
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bool HonorNaNs = true;
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bool ApproxFunc = false;
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bool SignedZeros = true;
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bool AssociativeMath = false;
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bool ReciprocalMath = false;
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if (const Arg *A = Args.getLastArg(options::OPT_ffp_contract)) {
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const StringRef Val = A->getValue();
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if (Val == "fast" || Val == "off") {
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FPContract = Val;
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} else if (Val == "on") {
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// Warn instead of error because users might have makefiles written for
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// gfortran (which accepts -ffp-contract=on)
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D.Diag(diag::warn_drv_unsupported_option_for_flang)
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<< Val << A->getOption().getName() << "off";
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FPContract = "off";
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} else
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// Clang's "fast-honor-pragmas" option is not supported because it is
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// non-standard
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D.Diag(diag::err_drv_unsupported_option_argument)
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<< A->getSpelling() << Val;
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}
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for (const Arg *A : Args) {
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auto optId = A->getOption().getID();
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switch (optId) {
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// if this isn't an FP option, skip the claim below
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default:
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continue;
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case options::OPT_fhonor_infinities:
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HonorINFs = true;
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break;
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case options::OPT_fno_honor_infinities:
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HonorINFs = false;
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break;
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case options::OPT_fhonor_nans:
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HonorNaNs = true;
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break;
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case options::OPT_fno_honor_nans:
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HonorNaNs = false;
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break;
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case options::OPT_fapprox_func:
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ApproxFunc = true;
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break;
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case options::OPT_fno_approx_func:
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ApproxFunc = false;
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break;
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case options::OPT_fsigned_zeros:
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SignedZeros = true;
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break;
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case options::OPT_fno_signed_zeros:
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SignedZeros = false;
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break;
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case options::OPT_fassociative_math:
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AssociativeMath = true;
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break;
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case options::OPT_fno_associative_math:
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AssociativeMath = false;
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break;
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case options::OPT_freciprocal_math:
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ReciprocalMath = true;
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break;
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case options::OPT_fno_reciprocal_math:
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ReciprocalMath = false;
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break;
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}
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// If we handled this option claim it
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A->claim();
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}
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if (!FPContract.empty())
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CmdArgs.push_back(Args.MakeArgString("-ffp-contract=" + FPContract));
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if (!HonorINFs)
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CmdArgs.push_back("-menable-no-infs");
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if (!HonorNaNs)
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CmdArgs.push_back("-menable-no-nans");
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if (ApproxFunc)
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CmdArgs.push_back("-fapprox-func");
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if (!SignedZeros)
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CmdArgs.push_back("-fno-signed-zeros");
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if (AssociativeMath && !SignedZeros)
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CmdArgs.push_back("-mreassociate");
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if (ReciprocalMath)
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CmdArgs.push_back("-freciprocal-math");
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}
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void Flang::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output, const InputInfoList &Inputs,
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const ArgList &Args, const char *LinkingOutput) const {
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const auto &TC = getToolChain();
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const llvm::Triple &Triple = TC.getEffectiveTriple();
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const std::string &TripleStr = Triple.getTriple();
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const Driver &D = TC.getDriver();
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ArgStringList CmdArgs;
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// Invoke ourselves in -fc1 mode.
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CmdArgs.push_back("-fc1");
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// Add the "effective" target triple.
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CmdArgs.push_back("-triple");
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CmdArgs.push_back(Args.MakeArgString(TripleStr));
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if (isa<PreprocessJobAction>(JA)) {
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CmdArgs.push_back("-E");
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} else if (isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) {
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if (JA.getType() == types::TY_Nothing) {
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CmdArgs.push_back("-fsyntax-only");
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} else if (JA.getType() == types::TY_AST) {
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CmdArgs.push_back("-emit-ast");
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} else if (JA.getType() == types::TY_LLVM_IR ||
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JA.getType() == types::TY_LTO_IR) {
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CmdArgs.push_back("-emit-llvm");
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} else if (JA.getType() == types::TY_LLVM_BC ||
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JA.getType() == types::TY_LTO_BC) {
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CmdArgs.push_back("-emit-llvm-bc");
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} else if (JA.getType() == types::TY_PP_Asm) {
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CmdArgs.push_back("-S");
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} else {
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assert(false && "Unexpected output type!");
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}
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} else if (isa<AssembleJobAction>(JA)) {
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CmdArgs.push_back("-emit-obj");
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} else {
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assert(false && "Unexpected action class for Flang tool.");
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}
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const InputInfo &Input = Inputs[0];
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types::ID InputType = Input.getType();
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// Add preprocessing options like -I, -D, etc. if we are using the
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// preprocessor (i.e. skip when dealing with e.g. binary files).
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if (types::getPreprocessedType(InputType) != types::TY_INVALID)
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addPreprocessingOptions(Args, CmdArgs);
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addFortranDialectOptions(Args, CmdArgs);
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// Color diagnostics are parsed by the driver directly from argv and later
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// re-parsed to construct this job; claim any possible color diagnostic here
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// to avoid warn_drv_unused_argument.
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Args.getLastArg(options::OPT_fcolor_diagnostics,
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options::OPT_fno_color_diagnostics);
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if (D.getDiags().getDiagnosticOptions().ShowColors)
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CmdArgs.push_back("-fcolor-diagnostics");
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// -fPIC and related options.
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addPicOptions(Args, CmdArgs);
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// Floating point related options
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addFloatingPointOptions(D, Args, CmdArgs);
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// Add target args, features, etc.
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addTargetOptions(Args, CmdArgs);
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// Add other compile options
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addOtherOptions(Args, CmdArgs);
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// Forward -Xflang arguments to -fc1
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Args.AddAllArgValues(CmdArgs, options::OPT_Xflang);
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// Forward -mllvm options to the LLVM option parser. In practice, this means
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// forwarding to `-fc1` as that's where the LLVM parser is run.
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for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
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A->claim();
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A->render(Args, CmdArgs);
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}
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for (const Arg *A : Args.filtered(options::OPT_mmlir)) {
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A->claim();
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A->render(Args, CmdArgs);
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}
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// Optimization level for CodeGen.
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if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) {
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if (A->getOption().matches(options::OPT_O4)) {
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CmdArgs.push_back("-O3");
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D.Diag(diag::warn_O4_is_O3);
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} else {
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A->render(Args, CmdArgs);
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}
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}
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if (Output.isFilename()) {
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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} else {
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assert(Output.isNothing() && "Invalid output.");
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}
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assert(Input.isFilename() && "Invalid input.");
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addDashXForInput(Args, Input, CmdArgs);
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CmdArgs.push_back(Input.getFilename());
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// TODO: Replace flang-new with flang once the new driver replaces the
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// throwaway driver
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const char *Exec = Args.MakeArgString(D.GetProgramPath("flang-new", TC));
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C.addCommand(std::make_unique<Command>(JA, *this,
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ResponseFileSupport::AtFileUTF8(),
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Exec, CmdArgs, Inputs, Output));
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}
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Flang::Flang(const ToolChain &TC) : Tool("flang-new", "flang frontend", TC) {}
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Flang::~Flang() {}
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