[CI] Provide libclc targets to build and test (#5091)

Follow up to #5062

This PR ensures that `libclc` is built and tested against:
*  `amdgcn--;amdgcn--amdhsa`
* `nvptx64--;nvptx64--nvidiacl`

buildbot/configure.py

@@ -15,6 +15,9 @@ def do_configure(args):
 
     llvm_external_projects = 'sycl;llvm-spirv;opencl;libdevice;xpti;xptifw'
 
+    libclc_amd_target_names = ';amdgcn--;amdgcn--amdhsa'
+    libclc_nvidia_target_names = 'nvptx64--;nvptx64--nvidiacl'
+
     if args.llvm_external_projects:
         llvm_external_projects += ";" + args.llvm_external_projects.replace(",", ";")
 
@@ -43,18 +46,6 @@ def do_configure(args):
     sycl_enable_xpti_tracing = 'ON'
     xpti_enable_werror = 'ON'
 
-    build_libclc = False
-
-    if args.ci_defaults:
-        print("#############################################")
-        print("# Default CI configuration will be applied. #")
-        print("#############################################")
-
-        # For clang-format and clang-tidy
-        llvm_enable_projects += ";clang-tools-extra"
-        # libclc is required for CI validation
-        build_libclc = True
-
     # replace not append, so ARM ^ X86
     if args.arm:
         llvm_targets_to_build = 'ARM;AArch64'
@@ -63,26 +54,26 @@ def do_configure(args):
         sycl_build_pi_esimd_emulator = 'ON'
 
     if args.cuda or args.hip:
-        build_libclc = True
+        llvm_enable_projects += ';libclc'
 
     if args.cuda:
         llvm_targets_to_build += ';NVPTX'
-        libclc_targets_to_build = 'nvptx64--;nvptx64--nvidiacl'
+        libclc_targets_to_build = libclc_nvidia_target_names
         libclc_gen_remangled_variants = 'ON'
         sycl_build_pi_cuda = 'ON'
 
     if args.hip:
         if args.hip_platform == 'AMD':
             llvm_targets_to_build += ';AMDGPU'
-            libclc_targets_to_build += ';amdgcn--;amdgcn--amdhsa'
+            libclc_targets_to_build += libclc_amd_target_names
             if args.hip_amd_arch:
                 sycl_clang_extra_flags += "-Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch="+args.hip_amd_arch
 
             # The HIP plugin for AMD uses lld for linking
             llvm_enable_projects += ';lld'
         elif args.hip_platform == 'NVIDIA' and not args.cuda:
             llvm_targets_to_build += ';NVPTX'
-            libclc_targets_to_build += ';nvptx64--;nvptx64--nvidiacl'
+            libclc_targets_to_build += libclc_nvidia_target_names
         libclc_gen_remangled_variants = 'ON'
 
         sycl_build_pi_hip_platform = args.hip_platform
@@ -103,10 +94,28 @@ def do_configure(args):
         llvm_build_shared_libs = 'ON'
 
     if args.use_lld:
-      llvm_enable_lld = 'ON'
+        llvm_enable_lld = 'ON'
 
-    if build_libclc:
-        llvm_enable_projects += ';libclc'
+    # CI Default conditionally appends to options, keep it at the bottom of
+    # args handling
+    if args.ci_defaults:
+        print("#############################################")
+        print("# Default CI configuration will be applied. #")
+        print("#############################################")
+
+        # For clang-format and clang-tidy
+        llvm_enable_projects += ";clang-tools-extra"
+        # libclc is required for CI validation
+        if 'libclc' not in llvm_enable_projects:
+            llvm_enable_projects += ';libclc'
+        # libclc passes `--nvvm-reflect-enable=false`, build NVPTX to enable it
+        if 'NVPTX' not in llvm_targets_to_build:
+            llvm_targets_to_build += ';NVPTX'
+        # Add both NVIDIA and AMD libclc targets
+        if libclc_amd_target_names not in libclc_targets_to_build:
+            libclc_targets_to_build += libclc_amd_target_names
+        if libclc_nvidia_target_names not in libclc_targets_to_build:
+            libclc_targets_to_build += libclc_nvidia_target_names
 
     install_dir = os.path.join(abs_obj_dir, "install")
 

libclc/test/CMakeLists.txt

@@ -13,6 +13,7 @@ set(LIBCLC_TEST_DEPS
   llvm-dis
   not
   clang
+  count
 )
 
 add_custom_target(check-libclc)

libclc/test/lit.cfg.py

@@ -44,7 +44,8 @@
   "-target", target,
   "-Xclang", "-fdeclare-spirv-builtins",
   "-Xclang", "-mlink-builtin-bitcode",
-  "-Xclang", os.path.join(config.llvm_libs_dir, "clc", builtins)
+  "-Xclang", os.path.join(config.llvm_libs_dir, "clc", builtins),
+  "-nogpulib"
 ]
 
 if target == 'amdgcn--amdhsa':