i965/shader: Pull assign_common_binding_table_offsets out of backend_shader

This really has nothing to do with the backend compiler and we'd like to
eventually be able to set this up earlier in the compile process.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

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

@@ -4749,7 +4749,9 @@ fs_visitor::assign_fs_binding_table_offsets()
    prog_data->binding_table.render_target_start = next_binding_table_offset;
    next_binding_table_offset += MAX2(key->nr_color_regions, 1);
 
-   assign_common_binding_table_offsets(next_binding_table_offset);
+   brw_assign_common_binding_table_offsets(MESA_SHADER_FRAGMENT, devinfo,
+                                           shader_prog, prog, stage_prog_data,
+                                           next_binding_table_offset);
 }
 
 void
@@ -4763,7 +4765,9 @@ fs_visitor::assign_cs_binding_table_offsets()
    prog_data->binding_table.work_groups_start = next_binding_table_offset;
    next_binding_table_offset++;
 
-   assign_common_binding_table_offsets(next_binding_table_offset);
+   brw_assign_common_binding_table_offsets(MESA_SHADER_COMPUTE, devinfo,
+                                           shader_prog, prog, stage_prog_data,
+                                           next_binding_table_offset);
 }
 
 void
@@ -4979,7 +4983,9 @@ fs_visitor::run_vs(gl_clip_plane *clip_planes)
 {
    assert(stage == MESA_SHADER_VERTEX);
 
-   assign_common_binding_table_offsets(0);
+   brw_assign_common_binding_table_offsets(MESA_SHADER_VERTEX, devinfo,
+                                           shader_prog, prog, stage_prog_data,
+                                           0);
    setup_vs_payload();
 
    if (shader_time_index >= 0)

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

@@ -1352,16 +1352,25 @@ backend_shader::invalidate_cfg()
  * trigger some of our asserts that surface indices are < BRW_MAX_SURFACES.
  */
 void
-backend_shader::assign_common_binding_table_offsets(uint32_t next_binding_table_offset)
+brw_assign_common_binding_table_offsets(gl_shader_stage stage,
+                                        const struct brw_device_info *devinfo,
+                                        const struct gl_shader_program *shader_prog,
+                                        const struct gl_program *prog,
+                                        struct brw_stage_prog_data *stage_prog_data,
+                                        uint32_t next_binding_table_offset)
 {
+   const struct gl_shader *shader = NULL;
    int num_textures = _mesa_fls(prog->SamplersUsed);
 
+   if (shader_prog)
+      shader = shader_prog->_LinkedShaders[stage];
+
    stage_prog_data->binding_table.texture_start = next_binding_table_offset;
    next_binding_table_offset += num_textures;
 
    if (shader) {
       stage_prog_data->binding_table.ubo_start = next_binding_table_offset;
-      next_binding_table_offset += shader->base.NumUniformBlocks;
+      next_binding_table_offset += shader->NumUniformBlocks;
    } else {
       stage_prog_data->binding_table.ubo_start = 0xd0d0d0d0;
    }
@@ -1392,9 +1401,9 @@ backend_shader::assign_common_binding_table_offsets(uint32_t next_binding_table_
       stage_prog_data->binding_table.abo_start = 0xd0d0d0d0;
    }
 
-   if (shader && shader->base.NumImages) {
+   if (shader && shader->NumImages) {
       stage_prog_data->binding_table.image_start = next_binding_table_offset;
-      next_binding_table_offset += shader->base.NumImages;
+      next_binding_table_offset += shader->NumImages;
    } else {
       stage_prog_data->binding_table.image_start = 0xd0d0d0d0;
    }

src/mesa/drivers/dri/i965/brw_shader.h

@@ -24,6 +24,7 @@
 #include <stdint.h>
 #include "brw_reg.h"
 #include "brw_defines.h"
+#include "brw_context.h"
 #include "main/compiler.h"
 #include "glsl/ir.h"
 #include "program/prog_parameter.h"
@@ -266,8 +267,6 @@ public:
    void calculate_cfg();
    void invalidate_cfg();
 
-   void assign_common_binding_table_offsets(uint32_t next_binding_table_offset);
-
    virtual void invalidate_live_intervals() = 0;
 };
 
@@ -295,6 +294,14 @@ extern "C" {
 struct brw_compiler *
 brw_compiler_create(void *mem_ctx, const struct brw_device_info *devinfo);
 
+void
+brw_assign_common_binding_table_offsets(gl_shader_stage stage,
+                                        const struct brw_device_info *devinfo,
+                                        const struct gl_shader_program *shader_prog,
+                                        const struct gl_program *prog,
+                                        struct brw_stage_prog_data *stage_prog_data,
+                                        uint32_t next_binding_table_offset);
+
 bool brw_vs_precompile(struct gl_context *ctx,
                        struct gl_shader_program *shader_prog,
                        struct gl_program *prog);

src/mesa/drivers/dri/i965/brw_vec4.cpp

@@ -1710,7 +1710,8 @@ vec4_vs_visitor::setup_payload(void)
 void
 vec4_visitor::assign_binding_table_offsets()
 {
-   assign_common_binding_table_offsets(0);
+   brw_assign_common_binding_table_offsets(stage, devinfo, shader_prog, prog,
+                                           stage_prog_data, 0);
 }
 
 src_reg

src/mesa/drivers/dri/i965/gen6_gs_visitor.cpp

@@ -41,7 +41,9 @@ gen6_gs_visitor::assign_binding_table_offsets()
    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
     * feedback surfaces.
     */
-   assign_common_binding_table_offsets(BRW_MAX_SOL_BINDINGS);
+   brw_assign_common_binding_table_offsets(MESA_SHADER_GEOMETRY, devinfo,
+                                           shader_prog, prog, stage_prog_data,
+                                           BRW_MAX_SOL_BINDINGS);
 }
 
 void