radv: move {load,store}_var intrinsics scanning in different functions

These are going to be crazy and we are probably going to add
more scan stuff in the future. Also use switch cases instead.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/amd/vulkan/radv_shader_info.c

@@ -87,6 +87,83 @@ static void get_deref_offset(nir_deref_var *deref, unsigned *const_out)
 	*const_out = const_offset;
 }
 
+static void
+gather_intrinsic_load_var_info(const nir_shader *nir,
+			       const nir_intrinsic_instr *instr,
+			       struct radv_shader_info *info)
+{
+	switch (nir->info.stage) {
+	case MESA_SHADER_VERTEX: {
+		nir_deref_var *dvar = instr->variables[0];
+		nir_variable *var = dvar->var;
+
+		if (var->data.mode == nir_var_shader_in) {
+			unsigned idx = var->data.location;
+			uint8_t mask = nir_ssa_def_components_read(&instr->dest.ssa);
+
+			info->vs.input_usage_mask[idx] |=
+				mask << var->data.location_frac;
+		}
+		break;
+	}
+	default:
+		break;
+	}
+}
+
+static void
+gather_intrinsic_store_var_info(const nir_shader *nir,
+				const nir_intrinsic_instr *instr,
+				struct radv_shader_info *info)
+{
+	nir_deref_var *dvar = instr->variables[0];
+	nir_variable *var = dvar->var;
+
+	if (var->data.mode == nir_var_shader_out) {
+		unsigned attrib_count = glsl_count_attribute_slots(var->type, false);
+		unsigned idx = var->data.location;
+		unsigned comp = var->data.location_frac;
+		unsigned const_offset = 0;
+
+		get_deref_offset(dvar, &const_offset);
+
+		switch (nir->info.stage) {
+		case MESA_SHADER_VERTEX:
+			for (unsigned i = 0; i < attrib_count; i++) {
+				info->vs.output_usage_mask[idx + i + const_offset] |=
+					instr->const_index[0] << comp;
+			}
+			break;
+		case MESA_SHADER_TESS_EVAL:
+			for (unsigned i = 0; i < attrib_count; i++) {
+				info->tes.output_usage_mask[idx + i + const_offset] |=
+					instr->const_index[0] << comp;
+			}
+			break;
+		case MESA_SHADER_TESS_CTRL: {
+			unsigned param = shader_io_get_unique_index(idx);
+			const struct glsl_type *type = var->type;
+
+			if (!var->data.patch)
+				type = glsl_get_array_element(var->type);
+
+			unsigned slots =
+				var->data.compact ? DIV_ROUND_UP(glsl_get_length(type), 4)
+						  : glsl_count_attribute_slots(type, false);
+
+			if (idx == VARYING_SLOT_CLIP_DIST0)
+				slots = (nir->info.clip_distance_array_size +
+					 nir->info.cull_distance_array_size > 4) ? 2 : 1;
+
+			mark_tess_output(info, var->data.patch, param, slots);
+			break;
+		}
+		default:
+			break;
+		}
+	}
+}
+
 static void
 gather_intrinsic_info(const nir_shader *nir, const nir_intrinsic_instr *instr,
 		      struct radv_shader_info *info)
@@ -197,55 +274,11 @@ gather_intrinsic_info(const nir_shader *nir, const nir_intrinsic_instr *instr,
 			info->ps.writes_memory = true;
 		break;
 	case nir_intrinsic_load_var:
-		if (nir->info.stage == MESA_SHADER_VERTEX) {
-			nir_deref_var *dvar = instr->variables[0];
-			nir_variable *var = dvar->var;
-
-			if (var->data.mode == nir_var_shader_in) {
-				unsigned idx = var->data.location;
-				uint8_t mask =
-					nir_ssa_def_components_read(&instr->dest.ssa) << var->data.location_frac;
-				info->vs.input_usage_mask[idx] |= mask;
-			}
-		}
+		gather_intrinsic_load_var_info(nir, instr, info);
 		break;
-	case nir_intrinsic_store_var: {
-		nir_deref_var *dvar = instr->variables[0];
-		nir_variable *var = dvar->var;
-
-		if (var->data.mode == nir_var_shader_out) {
-			unsigned attrib_count = glsl_count_attribute_slots(var->type, false);
-			unsigned idx = var->data.location;
-			unsigned comp = var->data.location_frac;
-			unsigned const_offset = 0;
-
-			get_deref_offset(dvar, &const_offset);
-
-			if (nir->info.stage == MESA_SHADER_VERTEX) {
-				for (unsigned i = 0; i < attrib_count; i++) {
-					info->vs.output_usage_mask[idx + i + const_offset] |=
-						instr->const_index[0] << comp;
-				}
-			} else if (nir->info.stage == MESA_SHADER_TESS_EVAL) {
-				for (unsigned i = 0; i < attrib_count; i++) {
-					info->tes.output_usage_mask[idx + i + const_offset] |=
-						instr->const_index[0] << comp;
-				}
-			} else if (nir->info.stage == MESA_SHADER_TESS_CTRL) {
-				unsigned param = shader_io_get_unique_index(idx);
-				const struct glsl_type *type = var->type;
-				if (!var->data.patch)
-					type = glsl_get_array_element(var->type);
-				unsigned slots =
-					var->data.compact ? DIV_ROUND_UP(glsl_get_length(type), 4)
-					: glsl_count_attribute_slots(type, false);
-				if (idx == VARYING_SLOT_CLIP_DIST0)
-					slots = (nir->info.clip_distance_array_size + nir->info.cull_distance_array_size > 4) ? 2 : 1;
-				mark_tess_output(info, var->data.patch, param, slots);
-			}
-		}
+	case nir_intrinsic_store_var:
+		gather_intrinsic_store_var_info(nir, instr, info);
 		break;
-	}
 	default:
 		break;
 	}