[SYCL] Support -f[no-]sycl-rdc in clang-cl, add Windows lit tests (#7748)

The cause of the windows test failures in my previous change was 
1) Expected linux host triple in a few places
2) Did not account for different number of device libraries for windows

I also added support for -f[no-]sycl-rdc in clang-cl

I tested these manually on Windows

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

clang/include/clang/Driver/Options.td

@@ -2998,8 +2998,8 @@ def fsycl_max_parallel_jobs_EQ : Joined<["-"], "fsycl-max-parallel-link-jobs=">,
   HelpText<"Experimental feature: Controls the maximum parallelism of actions performed "
   "on SYCL device code post-link, i.e. the generation of SPIR-V device images "
   "or AOT compilation of each device image.">;
-def : Flag<["-"], "fsycl-rdc">, Alias<fgpu_rdc>;
-def : Flag<["-"], "fno-sycl-rdc">, Alias<fno_gpu_rdc>;
+def : Flag<["-"], "fsycl-rdc">, Flags<[CoreOption]>, Alias<fgpu_rdc>;
+def : Flag<["-"], "fno-sycl-rdc">, Flags<[CoreOption]>, Alias<fno_gpu_rdc>;
 def fsyntax_only : Flag<["-"], "fsyntax-only">,
   Flags<[NoXarchOption,CoreOption,CC1Option,FC1Option,FlangOption]>, Group<Action_Group>,
   HelpText<"Run the preprocessor, parser and semantic analysis stages">;

clang/test/Driver/sycl-no-rdc-fat-archive-win.cpp

@@ -0,0 +1,35 @@
+/// test behaviors of passing a fat static lib with -fno-sycl-rdc on Windows
+// REQUIRES: system-windows
+
+// Build a fat static lib that will be used for all tests
+// RUN: echo "void foo(void) {}" > %t1.cpp
+// RUN: %clangxx -target x86_64-pc-windows-msvc -fsycl %t1.cpp -c -o %t1_bundle.o
+// RUN: llvm-ar cr %t_lib.a %t1_bundle.o
+// RUN: %clang -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=off --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=auto --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=per_kernel --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=per_source --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang_cl -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=off --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang_cl -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=auto --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang_cl -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=per_kernel --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang_cl -### -fsycl -fno-sycl-rdc -fsycl-device-code-split=per_source --sysroot=%S/Inputs/SYCL %t_lib.a 2>&1 -ccc-print-phases | FileCheck %s
+// CHECK: 2: input, "{{.*}}_lib.a", archive
+// CHECK: 3: clang-offload-unbundler, {2}, tempfilelist
+// CHECK: 4: spirv-to-ir-wrapper, {3}, tempfilelist, (device-sycl)
+// CHECK: 5: input, "{{.*}}libsycl-crt{{.*}}", object
+// CHECK: 6: clang-offload-unbundler, {5}, object
+// CHECK: 7: offload, " (spir64-unknown-unknown)" {6}, object
+// CHECK: 68: linker, {7, {{.*}}}, ir, (device-sycl)
+// CHECK: 69: linker, {4, 68}, ir, (device-sycl)
+// CHECK: 70: foreach, {4, 69}, ir, (device-sycl)
+// CHECK: 71: file-table-tform, {4, 70}, tempfilelist, (device-sycl)
+// CHECK: 72: sycl-post-link, {71}, tempfiletable, (device-sycl)
+// CHECK: 73: foreach, {71, 72}, tempfiletable, (device-sycl)
+// CHECK: 74: file-table-tform, {73}, tempfilelist, (device-sycl)
+// CHECK: 75: file-table-tform, {73}, tempfilelist, (device-sycl)
+// CHECK: 76: foreach, {71, 75}, tempfilelist, (device-sycl)
+// CHECK: 77: file-table-tform, {76}, tempfilelist, (device-sycl)
+// CHECK: 78: llvm-spirv, {77}, tempfilelist, (device-sycl)
+// CHECK: 79: file-table-tform, {74, 78}, tempfiletable, (device-sycl)
+// CHECK: 80: clang-offload-wrapper, {79}, object, (device-sycl)
+// CHECK: 81: offload, "host-sycl (x86_64-pc-windows-msvc)" {1}, "device-sycl (spir64-unknown-unknown)" {80}, image

clang/test/Driver/sycl-no-rdc-win.cpp

@@ -0,0 +1,34 @@
+/// Tests for -fno-sycl-rdc on Windows
+// REQUIRES: system-windows
+
+// RUN: touch %t1.cpp
+// RUN: touch %t2.cpp
+// RUN: %clang -### -fsycl -fno-sycl-rdc --sysroot=%S/Inputs/SYCL %t1.cpp %t2.cpp 2>&1 -ccc-print-phases | FileCheck %s
+// RUN: %clang_cl -### -fsycl -fno-sycl-rdc --sysroot=%S/Inputs/SYCL %t1.cpp %t2.cpp 2>&1 -ccc-print-phases | FileCheck %s
+
+// CHECK: 3: input, "{{.*}}1.cpp", c++, (device-sycl)
+// CHECK: 4: preprocessor, {3}, c++-cpp-output, (device-sycl)
+// CHECK: 5: compiler, {4}, ir, (device-sycl)
+// CHECK: 13: input, "{{.*}}2.cpp", c++, (device-sycl)
+// CHECK: 14: preprocessor, {13}, c++-cpp-output, (device-sycl)
+// CHECK: 15: compiler, {14}, ir, (device-sycl)
+
+// CHECK: 21: input, {{.*}}libsycl-crt{{.*}}, object
+// CHECK: 22: clang-offload-unbundler, {21}, object
+// CHECK: 23: offload, " (spir64-unknown-unknown)" {22}, object
+// CHECK: 84: linker, {23, {{.*}}}, ir, (device-sycl)
+// CHECK: 85: linker, {5, 84}, ir, (device-sycl)
+// CHECK: 86: sycl-post-link, {85}, tempfiletable, (device-sycl)
+// CHECK: 87: file-table-tform, {86}, tempfilelist, (device-sycl)
+// CHECK: 88: llvm-spirv, {87}, tempfilelist, (device-sycl)
+// CHECK: 89: file-table-tform, {86, 88}, tempfiletable, (device-sycl)
+// CHECK: 90: clang-offload-wrapper, {89}, object, (device-sycl)
+
+// CHECK: 91: linker, {15, 84}, ir, (device-sycl)
+// CHECK: 92: sycl-post-link, {91}, tempfiletable, (device-sycl)
+// CHECK: 93: file-table-tform, {92}, tempfilelist, (device-sycl)
+// CHECK: 94: llvm-spirv, {93}, tempfilelist, (device-sycl)
+// CHECK: 95: file-table-tform, {92, 94}, tempfiletable, (device-sycl)
+// CHECK: 96: clang-offload-wrapper, {95}, object, (device-sycl)
+
+// CHECK: 97: offload, "host-sycl (x86_64-pc-windows-msvc)" {{{.*}}}, "device-sycl (spir64-unknown-unknown)" {90}, "device-sycl (spir64-unknown-unknown)" {96}, image