<div dir="ltr"><div>Have you seen this matter somewhere?  It seems like a reasonable thing to do none the less.  3 and 4 are<br><br></div>Reviewed-by: Jason Ekstrand <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Oct 28, 2017 at 10:32 AM, Kenneth Graunke <span dir="ltr"><<a href="mailto:kenneth@whitecape.org" target="_blank">kenneth@whitecape.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">This avoids recompiles for shaders that don't use explicit derivatives<br>
when ctx->Hint.<wbr>FragmentShaderDerivative == GL_NICEST.<br>
---<br>
 src/mesa/drivers/dri/i965/brw_<wbr>wm.c | 1 +<br>
 1 file changed, 1 insertion(+)<br>
<br>
diff --git a/src/mesa/drivers/dri/i965/<wbr>brw_wm.c b/src/mesa/drivers/dri/i965/<wbr>brw_wm.c<br>
index ad1c8aed79e..a1e39b55fcb 100644<br>
--- a/src/mesa/drivers/dri/i965/<wbr>brw_wm.c<br>
+++ b/src/mesa/drivers/dri/i965/<wbr>brw_wm.c<br>
@@ -521,6 +521,7 @@ brw_wm_populate_key(struct brw_context *brw, struct brw_wm_prog_key *key)<br>
<br>
    /* _NEW_HINT */<br>
    key->high_quality_derivatives =<br>
+      prog->info.uses_fddx_fddy &&<br>
       ctx->Hint.<wbr>FragmentShaderDerivative == GL_NICEST;<br>
<br>
    if (devinfo->gen < 6)<br>
<span class="HOEnZb"><font color="#888888">--<br>
2.14.2<br>
<br>
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</font></span></blockquote></div><br></div>