[clang] [llvm] [Driver][SYCL] Add initial SYCL offload compilation support (PR #107493)

[Michael Toguchi via llvm-commits]

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@@ -0,0 +1,183 @@
+//===--- SYCL.cpp - SYCL Tool and ToolChain Implementations -----*- 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 "SYCL.h"
+#include "CommonArgs.h"
+#include "llvm/Support/Path.h"
+
+using namespace clang::driver;
+using namespace clang::driver::toolchains;
+using namespace clang::driver::tools;
+using namespace clang;
+using namespace llvm::opt;
+
+SYCLInstallationDetector::SYCLInstallationDetector(const Driver &D) : D(D) {
+  InstallationCandidates.emplace_back(D.Dir + "/..");
+}
+
+void SYCLInstallationDetector::AddSYCLIncludeArgs(
+    const ArgList &DriverArgs, ArgStringList &CC1Args) const {
+  // Add the SYCL header search locations in the specified order.
+  //   ../include/sycl/stl_wrappers
+  //   ../include
+  SmallString<128> IncludePath(D.Dir);
+  llvm::sys::path::append(IncludePath, "..");
+  llvm::sys::path::append(IncludePath, "include");
+  // This is used to provide our wrappers around STL headers that provide
+  // additional functions/template specializations when the user includes those
+  // STL headers in their programs (e.g., <complex>).
+  SmallString<128> STLWrappersPath(IncludePath);
+  llvm::sys::path::append(STLWrappersPath, "sycl");
+  llvm::sys::path::append(STLWrappersPath, "stl_wrappers");
+  CC1Args.push_back("-internal-isystem");
+  CC1Args.push_back(DriverArgs.MakeArgString(STLWrappersPath));
+  CC1Args.push_back("-internal-isystem");
+  CC1Args.push_back(DriverArgs.MakeArgString(IncludePath));
+}
+
+void SYCLInstallationDetector::print(llvm::raw_ostream &OS) const {
+  if (!InstallationCandidates.size())
+    return;
+  OS << "SYCL Installation Candidates: \n";
+  for (const auto &IC : InstallationCandidates) {
+    OS << IC << "\n";
+  }
+}
+
+// Unsupported options for SYCL device compilation.
+static std::vector<OptSpecifier> getUnsupportedOpts() {
+  std::vector<OptSpecifier> UnsupportedOpts = {
+      options::OPT_fsanitize_EQ,      // -fsanitize
+      options::OPT_fcf_protection_EQ, // -fcf-protection
+      options::OPT_fprofile_generate,
+      options::OPT_fprofile_generate_EQ,
+      options::OPT_fno_profile_generate, // -f[no-]profile-generate
+      options::OPT_ftest_coverage,
+      options::OPT_fno_test_coverage, // -f[no-]test-coverage
+      options::OPT_fcoverage_mapping,
+      options::OPT_fno_coverage_mapping, // -f[no-]coverage-mapping
+      options::OPT_coverage,             // --coverage
+      options::OPT_fprofile_instr_generate,
+      options::OPT_fprofile_instr_generate_EQ,
+      options::OPT_fno_profile_instr_generate, // -f[no-]profile-instr-generate
+      options::OPT_fprofile_arcs,
+      options::OPT_fno_profile_arcs, // -f[no-]profile-arcs
+      options::OPT_fcreate_profile,  // -fcreate-profile
+      options::OPT_fprofile_instr_use,
+      options::OPT_fprofile_instr_use_EQ,       // -fprofile-instr-use
+      options::OPT_forder_file_instrumentation, // -forder-file-instrumentation
+      options::OPT_fcs_profile_generate,        // -fcs-profile-generate
+      options::OPT_fcs_profile_generate_EQ};
----------------
mdtoguchi wrote:

@tahonermann, the `InstallationDetector` model was used mimicking the Cuda detectors.  There isn't really an installation to detect here, as everything should be part of the compiler build.  Perhaps the naming is not ideal maybe something more in the lines of `SYCLLocation` or just `SYCLInstallation`?  I'll clean out the `InstallationCandidates` as it is not pertinent.

https://github.com/llvm/llvm-project/pull/107493