nir/lower_tex: fix number of components in replace_gradient_with_lod()

We should make the dest in the textureLod() operation have the same number
of components as the destination in the original textureGrad()

Fixes regression in ES3-CTS.gtf.GL3Tests.shadow

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99072
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/compiler/nir/nir_lower_tex.c b/src/compiler/nir/nir_lower_tex.c
index c67a8eda3f23977532881f6a1957efa1701ca2fc..3e3ac8c255897b4d5456f1764e4dfb02d65ece9b 100644 (file)
--- a/src/compiler/nir/nir_lower_tex.c
+++ b/src/compiler/nir/nir_lower_tex.c
@@ -349,7 +349,8 @@ replace_gradient_with_lod(nir_builder *b, nir_ssa_def *lod, nir_tex_instr *tex)
 
    assert(src_num == num_srcs);
 
-   nir_ssa_dest_init(&txl->instr, &txl->dest, 4, 32, NULL);
+   nir_ssa_dest_init(&txl->instr, &txl->dest,
+                     tex->dest.ssa.num_components, 32, NULL);
    nir_builder_instr_insert(b, &txl->instr);
 
    nir_ssa_def_rewrite_uses(&tex->dest.ssa, nir_src_for_ssa(&txl->dest.ssa));