[Driver][SYCL] Update diagnostic behavior for -fsanitize with -fsycl (#6292)

When using -fsanitize for spir64 targets, the driver would error out not
allowing for compilation to move forward.  -fsanitize is currently not
supported for spir64 targets, but it is supported for host.

Restrict the -fsanitize option to only be used for the Host compilation but
also emit a diagnostic that -fsanitize is being ignored for the target
compilation.

Author: mdtoguchi

clang/lib/Driver/ToolChains/SYCL.cpp

@@ -622,6 +622,12 @@ SYCLToolChain::SYCLToolChain(const Driver &D, const llvm::Triple &Triple,
   // Lookup binaries into the driver directory, this is used to
   // discover the clang-offload-bundler executable.
   getProgramPaths().push_back(getDriver().Dir);
+
+  // Diagnose unsupported options only once.
+  // All sanitizer options are not currently supported.
+  for (auto A : Args.filtered(options::OPT_fsanitize_EQ))
+    D.getDiags().Report(clang::diag::warn_drv_unsupported_option_for_target)
+        << A->getAsString(Args) << getTriple().str();
 }
 
 void SYCLToolChain::addClangTargetOptions(
@@ -643,6 +649,8 @@ SYCLToolChain::TranslateArgs(const llvm::opt::DerivedArgList &Args,
       // Filter out any options we do not want to pass along to the device
       // compilation.
       switch ((options::ID)A->getOption().getID()) {
+      case options::OPT_fsanitize_EQ:
+        break;
       default:
         DAL->append(A);
         break;

clang/test/Driver/sycl-unsupported.cpp

@@ -0,0 +1,10 @@
+/// Diagnose unsupported options specific to SYCL compilations
+// RUN: %clangxx -fsycl -fsanitize=address -### %s 2>&1 \
+// RUN:  | FileCheck %s --check-prefix=SANITIZE -DARCH=spir64
+// RUN: %clangxx -fsycl -fsycl-targets=spir64_gen -fsanitize=address -### %s 2>&1 \
+// RUN:  | FileCheck %s --check-prefix=SANITIZE -DARCH=spir64_gen
+// RUN: %clangxx -fsycl -fsycl-targets=spir64_fpga -fsanitize=address -### %s 2>&1 \
+// RUN:  | FileCheck %s --check-prefix=SANITIZE -DARCH=spir64_fpga
+// RUN: %clangxx -fsycl -fsycl-targets=spir64_x86_64 -fsanitize=address -### %s 2>&1 \
+// RUN:  | FileCheck %s --check-prefix=SANITIZE -DARCH=spir64_x86_64
+// SANITIZE: ignoring '-fsanitize=address' option as it is not currently supported for target '[[ARCH]]{{.*}}' [-Woption-ignored]