i965: call brw_shader_gather_info() from the callers of brw_create_nir()

This will allow us to insert a nir linking step in brw_link_shader().

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>

src/mesa/drivers/dri/i965/brw_link.cpp

@@ -251,6 +251,20 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *shProg)
 
       prog->nir = brw_create_nir(brw, shProg, prog, (gl_shader_stage) stage,
                                  compiler->scalar_stage[stage]);
+   }
+
+   for (stage = 0; stage < ARRAY_SIZE(shProg->_LinkedShaders); stage++) {
+      struct gl_linked_shader *shader = shProg->_LinkedShaders[stage];
+      if (!shader)
+         continue;
+
+      struct gl_program *prog = shader->Program;
+      nir_shader *nir = shader->Program->nir;
+      brw_shader_gather_info(nir, prog);
+
+      NIR_PASS_V(nir, nir_lower_samplers, shProg);
+      NIR_PASS_V(nir, nir_lower_atomics, shProg);
+
       infos[stage] = &prog->nir->info;
 
       update_xfb_info(prog->sh.LinkedTransformFeedback, infos[stage]);

src/mesa/drivers/dri/i965/brw_program.c

@@ -107,13 +107,6 @@ brw_create_nir(struct brw_context *brw,
    NIR_PASS(progress, nir, nir_lower_system_values);
    NIR_PASS_V(nir, brw_nir_lower_uniforms, is_scalar);
 
-   brw_shader_gather_info(nir, prog);
-
-   if (shader_prog) {
-      NIR_PASS_V(nir, nir_lower_samplers, shader_prog);
-      NIR_PASS_V(nir, nir_lower_atomics, shader_prog);
-   }
-
    return nir;
 }
 
@@ -223,6 +216,8 @@ brwProgramStringNotify(struct gl_context *ctx,
 
       prog->nir = brw_create_nir(brw, NULL, prog, MESA_SHADER_FRAGMENT, true);
 
+      brw_shader_gather_info(prog->nir, prog);
+
       brw_fs_precompile(ctx, prog);
       break;
    }
@@ -245,6 +240,8 @@ brwProgramStringNotify(struct gl_context *ctx,
       prog->nir = brw_create_nir(brw, NULL, prog, MESA_SHADER_VERTEX,
                                  compiler->scalar_stage[MESA_SHADER_VERTEX]);
 
+      brw_shader_gather_info(prog->nir, prog);
+
       brw_vs_precompile(ctx, prog);
       break;
    }