[SYCL][Driver] Enable SPV_KHR_linkonce_odr extension (#4683)

Author: Fznamznon

clang/lib/Driver/ToolChains/Clang.cpp

@@ -9021,7 +9021,7 @@ void SPIRVTranslator::ConstructJob(Compilation &C, const JobAction &JA,
     std::string DefaultExtArg =
         ",+SPV_EXT_shader_atomic_float_add,+SPV_EXT_shader_atomic_float_min_max"
         ",+SPV_KHR_no_integer_wrap_decoration,+SPV_KHR_float_controls"
-        ",+SPV_KHR_expect_assume";
+        ",+SPV_KHR_expect_assume,+SPV_KHR_linkonce_odr";
     std::string INTELExtArg =
         ",+SPV_INTEL_subgroups,+SPV_INTEL_media_block_io"
         ",+SPV_INTEL_device_side_avc_motion_estimation"

clang/test/Driver/sycl-spirv-ext.c

@@ -29,7 +29,7 @@
 // CHECK-DEFAULT-SAME:,+SPV_EXT_shader_atomic_float_add
 // CHECK-DEFAULT-SAME:,+SPV_EXT_shader_atomic_float_min_max
 // CHECK-DEFAULT-SAME:,+SPV_KHR_no_integer_wrap_decoration,+SPV_KHR_float_controls
-// CHECK-DEFAULT-SAME:,+SPV_KHR_expect_assume
+// CHECK-DEFAULT-SAME:,+SPV_KHR_expect_assume,+SPV_KHR_linkonce_odr
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_subgroups,+SPV_INTEL_media_block_io
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_device_side_avc_motion_estimation
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_fpga_loop_controls,+SPV_INTEL_fpga_memory_attributes