compiler: add ACCESS_STREAM_CACHE_POLICY

radeonsi will use this.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

src/amd/common/ac_nir_to_llvm.c

@@ -1549,6 +1549,9 @@ static unsigned get_cache_policy(struct ac_nir_context *ctx,
 		cache_policy |= ac_glc;
 	}
 
+	if (access & ACCESS_STREAM_CACHE_POLICY)
+		cache_policy |= ac_slc;
+
 	return cache_policy;
 }
 

src/compiler/shader_enums.h

@@ -736,6 +736,9 @@ enum gl_access_qualifier
     * a lack of ACCESS_COHERENT and ACCESS_VOLATILE.
     */
    ACCESS_CAN_REORDER = (1 << 6),
+
+   /** Use as little cache space as possible. */
+   ACCESS_STREAM_CACHE_POLICY = (1 << 7),
 };
 
 /**