[clang] [llvm] Reland - [Driver][SYCL] Add initial SYCL offload compilation support … (PR #117268)

[Michael Toguchi via cfe-commits]

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@@ -0,0 +1,179 @@
+//===--- 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, const llvm::Triple &HostTriple,
+    const llvm::opt::ArgList &Args)
+    : D(D) {}
+
+void SYCLInstallationDetector::AddSYCLIncludeArgs(
+    const ArgList &DriverArgs, ArgStringList &CC1Args) const {
+  if (DriverArgs.hasArg(clang::driver::options::OPT_nobuiltininc))
+    return;
+
+  // 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));
+}
+
+// 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};
+  return UnsupportedOpts;
+}
+
+SYCLToolChain::SYCLToolChain(const Driver &D, const llvm::Triple &Triple,
+                             const ToolChain &HostTC, const ArgList &Args)
+    : ToolChain(D, Triple, Args), HostTC(HostTC),
+      SYCLInstallation(D, Triple, Args) {
+  // Lookup binaries into the driver directory, this is used to discover any
+  // dependent SYCL offload compilation tools.
+  getProgramPaths().push_back(getDriver().Dir);
+
+  // Diagnose unsupported options only once.
+  for (OptSpecifier Opt : getUnsupportedOpts()) {
+    if (const Arg *A = Args.getLastArg(Opt)) {
+      // All sanitizer options are not currently supported, except
+      // AddressSanitizer.
----------------
mdtoguchi wrote:

Right - I will remove this special casing until the support is upstreamed.

https://github.com/llvm/llvm-project/pull/117268