freedreno/ir3: Drop handling FRAG_RESULT_DEPTH writing to .z

Since we consume NIR, we get FRAG_RESULT_DEPTH in .x.  Something must have
been working out for this code to not be trying to get an undefined value,
but go ahead and drop it now.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4668>

diff --git a/src/freedreno/ir3/ir3_compiler_nir.c b/src/freedreno/ir3/ir3_compiler_nir.c
index d9152416e4d05d50f1c77d75a7854a0a8ae8c39c..a82faee998e1e98d0c6dc435249ab2562a836b98 100644 (file)
--- a/src/freedreno/ir3/ir3_compiler_nir.c
+++ b/src/freedreno/ir3/ir3_compiler_nir.c
@@ -3150,12 +3150,10 @@ setup_output(struct ir3_context *ctx, nir_variable *out)
        unsigned n = out->data.driver_location;
        unsigned frac = out->data.location_frac;
        unsigned slot = out->data.location;
-       unsigned comp = 0;
 
        if (ctx->so->type == MESA_SHADER_FRAGMENT) {
                switch (slot) {
                case FRAG_RESULT_DEPTH:
-                       comp = 2;  /* tgsi will write to .z component */
                        so->writes_pos = true;
                        break;
                case FRAG_RESULT_COLOR:
@@ -3213,7 +3211,7 @@ setup_output(struct ir3_context *ctx, nir_variable *out)
        compile_assert(ctx, n < ARRAY_SIZE(so->outputs));
 
        so->outputs[n].slot = slot;
-       so->outputs[n].regid = regid(n, comp);
+       so->outputs[n].regid = regid(n, 0);
        so->outputs_count = MAX2(so->outputs_count, n + 1);
 
        for (int i = 0; i < ncomp; i++) {