intel/compiler: drop unused ray-tracing fields from cache hash

The compiler only references `intel_device_info->subslice_masks` for
ray tracing workloads.  Platforms which lack raytracing support can
share a cache even if they differ on this field.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28311>

src/intel/compiler/brw_device_sha1_gen_c.py

@@ -47,7 +47,12 @@ void
 brw_device_sha1_update(struct mesa_sha1 *ctx,
                        const struct intel_device_info *devinfo) {
 % for member in compiler_fields:
+% if member.ray_tracing_field:
+   if (devinfo->has_ray_tracing)
+      SHA_UPDATE_FIELD(${member.name});
+% else:
    SHA_UPDATE_FIELD(${member.name});
+% endif
 % endfor
 }
 

src/intel/dev/intel_device_info.py

@@ -65,13 +65,16 @@ class Enum:
 
 class Member:
     """Stores details needed to declare and serialize the member of a struct."""
-    def __init__(self, member_type, name, array=None, compiler_field=False, comment=None):
+    def __init__(self, member_type, name, array=None,
+                 compiler_field=False, ray_tracing_field=False,
+                 comment=None):
         self.member_type = member_type
         self.name = name
         self.array = array
         # indicates whether this field is used by the compiler, and whether it
         # should be included in the shader compiler cache hash function.
         self.compiler_field = compiler_field
+        self.ray_tracing_field = ray_tracing_field
         self.comment=comment
 
 class Struct:
@@ -362,6 +365,7 @@ Struct("intel_device_info",
         Member("uint8_t", "subslice_masks",
                array="INTEL_DEVICE_MAX_SLICES * DIV_ROUND_UP(INTEL_DEVICE_MAX_SUBSLICES, 8)",
                compiler_field=True,
+               ray_tracing_field=True,
                comment=dedent("""\
                An array of bit mask of the subslices available, use subslice_slice_stride
                to access this array.""")),