Mesa (master): radv: Add early exit for cache flushes.

[Bas Nieuwenhuizen]

Module: Mesa
Branch: master
Commit: e08f7416780389c96d4359474ef69ae73a9ab530
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e08f7416780389c96d4359474ef69ae73a9ab530

Author: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Date:   Tue Jun  6 19:15:47 2017 +0200

radv: Add early exit for cache flushes.

No sense checking each bit separately in the common case of none
being set.

Signed-off-by: Bas Nieuwenhuizen <basni at google.com>
Reviewed-by: Dave Airlie <airlied at redhat.com>

---

 src/amd/vulkan/si_cmd_buffer.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/amd/vulkan/si_cmd_buffer.c b/src/amd/vulkan/si_cmd_buffer.c
index a10034e4f2..1011c2d339 100644
--- a/src/amd/vulkan/si_cmd_buffer.c
+++ b/src/amd/vulkan/si_cmd_buffer.c
@@ -1089,6 +1089,9 @@ si_emit_cache_flush(struct radv_cmd_buffer *cmd_buffer)
 	                                          RADV_CMD_FLAG_VS_PARTIAL_FLUSH |
 	                                          RADV_CMD_FLAG_VGT_FLUSH);
 
+	if (!cmd_buffer->state.flush_bits)
+		return;
+
 	radeon_check_space(cmd_buffer->device->ws, cmd_buffer->cs, 128);
 
 	uint32_t *ptr = NULL;
@@ -1104,8 +1107,7 @@ si_emit_cache_flush(struct radv_cmd_buffer *cmd_buffer)
 	                       cmd_buffer->state.flush_bits);
 
 
-	if (cmd_buffer->state.flush_bits)
-		radv_cmd_buffer_trace_emit(cmd_buffer);
+	radv_cmd_buffer_trace_emit(cmd_buffer);
 	cmd_buffer->state.flush_bits = 0;
 }