vk: Cache each render pass's number of clear ops

During vkCreateRenderPass, count the number of clear ops and store them
in new members of anv_render_pass:

    uint32_t num_color_clear_attachments
    bool has_depth_clear_attachment
    bool has_stencil_clear_attachment

Cacheing these 8 bytes (including padding) reduces the number of times
that anv_cmd_buffer_clear_attachments needs to loop over the pass's
attachments.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/vulkan/anv_device.c b/src/vulkan/anv_device.c
index 5805ffab193..eaeae3b0a4f 100644
--- a/src/vulkan/anv_device.c
+++ b/src/vulkan/anv_device.c
@@ -2238,6 +2238,17 @@ VkResult anv_CreateRenderPass(
       att->stencil_load_op = pCreateInfo->pAttachments[i].stencilLoadOp;
       // att->store_op = pCreateInfo->pAttachments[i].storeOp;
       // att->stencil_store_op = pCreateInfo->pAttachments[i].stencilStoreOp;
+
+      if (att->load_op == VK_ATTACHMENT_LOAD_OP_CLEAR) {
+         if (anv_format_is_color(att->format)) {
+            ++pass->num_color_clear_attachments;
+         } else if (att->format->depth_format) {
+            pass->has_depth_clear_attachment = true;
+         }
+      } else if (att->stencil_load_op == VK_ATTACHMENT_LOAD_OP_CLEAR) {
+         assert(att->format->has_stencil);
+         pass->has_stencil_clear_attachment = true;
+      }
    }
 
    for (uint32_t i = 0; i < pCreateInfo->subpassCount; i++) {