gallium/util: fix util_color_[un]pack[-ub] to be strict aliasing safe

use pointer to union instead of void pointer.
gcc complained a lot, depending what the pointer originally actually was.
Looks like it's in fact maybe legal to cast for instance uint pointers to
union pointers as long as union contains a uint type, hence use this with some
callers, other just use union util_color in the first place.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/gallium/drivers/softpipe/sp_clear.c b/src/gallium/drivers/softpipe/sp_clear.c
index 8fac8e6e05f..f98087deb8c 100644
--- a/src/gallium/drivers/softpipe/sp_clear.c
+++ b/src/gallium/drivers/softpipe/sp_clear.c
@@ -48,6 +48,7 @@ softpipe_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
                double depth, unsigned stencil)
 {
    struct softpipe_context *softpipe = softpipe_context(pipe);
+   union util_color uc;
    unsigned cv;
    uint i;
 
@@ -62,12 +63,12 @@ softpipe_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
          struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];
 
-         util_pack_color(rgba, ps->format, &cv);
-         sp_tile_cache_clear(softpipe->cbuf_cache[i], rgba, cv);
+         util_pack_color(rgba, ps->format, &uc);
+         sp_tile_cache_clear(softpipe->cbuf_cache[i], rgba, uc.ui);
 
 #if !TILE_CLEAR_OPTIMIZATION
          /* non-cached surface */
-         pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, cv);
+         pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, uc.ui);
 #endif
       }
    }