Add compilation flags to increase icpx support

CMakeLists.txt

@@ -144,6 +144,12 @@ if (INSTALL_HEADER_ONLY)
   set_target_properties(portblas PROPERTIES
     INTERFACE_INCLUDE_DIRECTORIES "${PORTBLAS_INCLUDE};$<INSTALL_INTERFACE:src>"
   )
+  set(non_intel_target "AMD_GPU" "NVIDIA_GPU")
+  if((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND
+      (TUNING_TARGET IN_LIST non_intel_target) )
+      target_compile_options(portblas INTERFACE -fno-fast-math)
+      target_compile_options(portblas INTERFACE -mllvm -loopopt=0 )
+  endif()
 else()
   add_subdirectory(src)
   build_library(portblas ${BLAS_ENABLE_EXTENSIONS})

cmake/Modules/FindDPCPP.cmake

@@ -85,6 +85,7 @@ endif()
 add_definitions(-DSB_ENABLE_USM=1)
 set(SB_ENABLE_USM 1)
 list(APPEND DPCPP_FLAGS "-DSB_ENABLE_USM=1")
+set(non_intel_target "AMD_GPU" "NVIDIA_GPU")
 
 function(add_sycl_to_target)
   set(options)
@@ -96,6 +97,11 @@ function(add_sycl_to_target)
     "${multi_value_args}"
     ${ARGN}
   )
+  if((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND
+      (TUNING_TARGET IN_LIST non_intel_target) )
+    target_compile_options(${SB_ADD_SYCL_TARGET} PRIVATE -fno-fast-math)
+    target_compile_options(${SB_ADD_SYCL_TARGET} PRIVATE -mllvm -loopopt=0 )
+  endif()
   target_compile_options(${SB_ADD_SYCL_TARGET} PUBLIC ${DPCPP_FLAGS})
   get_target_property(target_type ${SB_ADD_SYCL_TARGET} TYPE)
   if (NOT target_type STREQUAL "OBJECT_LIBRARY")