[SYCL] Use same source for libsycl-crt (#3019)

Currently, the implementation of assert support for Linux and Windows are in 2 files glibc_wrapper.cpp and msvc_wrapper.cpp. We can merge them into one source and use macro "_WIN32" to separate Windows and Linux specific code.
We plan to add some more functions in libsycl-crt in the future and the implementation may be same for both Linux and Windows platform, keeping 2 different sources for Linux and Windows will lead to duplicate code then.

Signed-off-by: gejin <[email protected]>

Author: jinge90

libdevice/cmake/modules/SYCLLibdevice.cmake

@@ -2,11 +2,9 @@ set(obj_binary_dir "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}")
 if (WIN32)
   set(lib-suffix obj)
   set(spv_binary_dir "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}")
-  set(lib_crt_source msvc_wrapper.cpp)
 else()
   set(lib-suffix o)
   set(spv_binary_dir "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}")
-  set(lib_crt_source glibc_wrapper.cpp)
 endif()
 set(clang $<TARGET_FILE:clang>)
 
@@ -33,9 +31,9 @@ set(devicelib-obj-file ${obj_binary_dir}/libsycl-crt.${lib-suffix})
 add_custom_command(OUTPUT ${devicelib-obj-file}
                    COMMAND ${clang} -fsycl -c
                            ${compile_opts} ${sycl_targets_opt}
-                           ${CMAKE_CURRENT_SOURCE_DIR}/${lib_crt_source}
+                           ${CMAKE_CURRENT_SOURCE_DIR}/crt_wrapper.cpp
                            -o ${devicelib-obj-file}
-                   MAIN_DEPENDENCY ${lib_crt_source}
+                   MAIN_DEPENDENCY crt_wrapper.cpp
                    DEPENDS wrapper.h device.h spirv_vars.h clang clang-offload-bundler
                    VERBATIM)
 

libdevice/msvc_wrapper.cpp renamed to libdevice/crt_wrapper.cpp

@@ -1,4 +1,4 @@
-//==--- msvc_wrapper.cpp - wrappers for Microsoft C library functions ------==//
+//==------ crt_wrapper.cpp - wrappers for libc internal functions ----------==//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -9,6 +9,7 @@
 #include "wrapper.h"
 
 #ifdef __SPIR__
+#if defined(_WIN32)
 // Truncates a wide (16 or 32 bit) string (wstr) into an ASCII string (str).
 // Any non-ASCII characters are replaced by question mark '?'.
 static void __truncate_wchar_char_str(const wchar_t *wstr, char *str,
@@ -37,4 +38,15 @@ void _wassert(const wchar_t *wexpr, const wchar_t *wfile, unsigned line) {
       __spirv_LocalInvocationId_x(), __spirv_LocalInvocationId_y(),
       __spirv_LocalInvocationId_z());
 }
+#else
+DEVICE_EXTERN_C
+void __assert_fail(const char *expr, const char *file, unsigned int line,
+                   const char *func) {
+  __devicelib_assert_fail(
+      expr, file, line, func, __spirv_GlobalInvocationId_x(),
+      __spirv_GlobalInvocationId_y(), __spirv_GlobalInvocationId_z(),
+      __spirv_LocalInvocationId_x(), __spirv_LocalInvocationId_y(),
+      __spirv_LocalInvocationId_z());
+}
+#endif
 #endif // __SPIR__