nouveau/nvc0: silence maybe-uninitialized warning

gcc is not smart enough to see that

   enum pipe_format dst_fmt;
   ...

   switch (data_size) {
   case 16:
      dst_fmt = PIPE_FORMAT_R32G32B32A32_UINT;
      ...
      break;
   case 12:
      /* RGB32 is not a valid RT format. This will be handled by the pushbuf
       * uploader.
       */
      break;
   case 8:
      dst_fmt = PIPE_FORMAT_R32G32_UINT;
      ...
      break;
   case 4:
      dst_fmt = PIPE_FORMAT_R32_UINT;
      ...
      break;
   case 2:
      dst_fmt = PIPE_FORMAT_R16_UINT;
      ...
      break;
   case 1:
      dst_fmt = PIPE_FORMAT_R8_UINT;
      break;
   default:
      assert(!"Unsupported element size");
      return;
   }

   ...

   if (data_size == 12) {
      ...
      return;
   }

Does not result in dst_fmt being uninitialized when it is used so
lets just initialise it to silence the warning.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5766>

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
index 731b0b5dbf857207035fde9d01018e46bc5fe26e..725e391d4f7f41d991009b031b47f6a59f726300 100644 (file)
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
@@ -514,6 +514,7 @@ nvc0_clear_buffer(struct pipe_context *pipe,
       /* RGB32 is not a valid RT format. This will be handled by the pushbuf
        * uploader.
        */
+      dst_fmt = PIPE_FORMAT_NONE; /* Init dst_fmt to silence gcc warning */
       break;
    case 8:
       dst_fmt = PIPE_FORMAT_R32G32_UINT;