[llvm 16] libclc: disable opaque pointers when compiling to SPIR-V

[karolherbst]

Summary

There are still some regressions around opaque types like Event. Let's disable it for LLVM-16.

libclc/CMakeLists.txt

 set( CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake )
 set( CMAKE_CLC_COMPILER ${LLVM_CLANG} )
 set( CMAKE_CLC_ARCHIVE ${LLVM_LINK} )
+set( CMAKE_CLC_CREATE_STATIC_LIBRARY "<CMAKE_CLC_ARCHIVE> <LINK_FLAGS> -o <TARGET> <OBJECTS>" )
 set( CMAKE_LLAsm_PREPROCESSOR ${LLVM_CLANG} )
 set( CMAKE_LLAsm_COMPILER ${LLVM_AS} )
 set( CMAKE_LLAsm_ARCHIVE ${LLVM_LINK} )

       else()
         set( t "spir64--" )
       endif()
-      set( build_flags -O0 -finline-hint-functions )
-      set( opt_flags )
-      set( spvflags --spirv-max-version=1.1 )
+      set( build_flags -O0 -finline-hint-functions -Xclang -no-opaque-pointers )
+      set( linker_flags --opaque-pointers=0 )
+      set( opt_flags --opaque-pointers=0 )
+      set( spvflags -opaque-pointers=0 --spirv-max-version=1.1 )
     elseif( ${ARCH} STREQUAL "clspv" )
       set( t "spir--" )
       set( build_flags )
+      set( linker_flags )
       set( opt_flags -O3 )
     elseif( ${ARCH} STREQUAL "clspv64" )
       set( t "spir64--" )
       set( build_flags )
+      set( linker_flags )
       set( opt_flags -O3 )
     else()
       set( build_flags )
+      set( linker_flags )
       set( opt_flags -O3 )
     endif()
 

     target_compile_options( builtins.link.${arch_suffix} PRIVATE  -target
       ${t} ${mcpu} -fno-builtin -nostdlib ${build_flags} )
     set_target_properties( builtins.link.${arch_suffix} PROPERTIES
-      LINKER_LANGUAGE CLC )
+      LINKER_LANGUAGE CLC
+      STATIC_LIBRARY_OPTIONS "${linker_flags}" )
 
     set( obj_suffix ${arch_suffix}.bc )