i965: Use a const nir_shader in backend_shader

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

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

@@ -96,7 +96,7 @@ public:
               const void *key,
               struct brw_stage_prog_data *prog_data,
               struct gl_program *prog,
-              nir_shader *shader,
+              const nir_shader *shader,
               unsigned dispatch_width,
               int shader_time_index);
 

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

@@ -1070,7 +1070,7 @@ fs_visitor::fs_visitor(const struct brw_compiler *compiler, void *log_data,
                        const void *key,
                        struct brw_stage_prog_data *prog_data,
                        struct gl_program *prog,
-                       nir_shader *shader,
+                       const nir_shader *shader,
                        unsigned dispatch_width,
                        int shader_time_index)
    : backend_shader(compiler, log_data, mem_ctx, shader, prog_data),

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

@@ -657,7 +657,7 @@ brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg)
 backend_shader::backend_shader(const struct brw_compiler *compiler,
                                void *log_data,
                                void *mem_ctx,
-                               nir_shader *shader,
+                               const nir_shader *shader,
                                struct brw_stage_prog_data *stage_prog_data)
    : compiler(compiler),
      log_data(log_data),

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

@@ -225,7 +225,7 @@ protected:
    backend_shader(const struct brw_compiler *compiler,
                   void *log_data,
                   void *mem_ctx,
-                  nir_shader *shader,
+                  const nir_shader *shader,
                   struct brw_stage_prog_data *stage_prog_data);
 
 public:
@@ -234,7 +234,7 @@ public:
    void *log_data; /* Passed to compiler->*_log functions */
 
    const struct brw_device_info * const devinfo;
-   nir_shader *nir;
+   const nir_shader *nir;
    struct brw_stage_prog_data * const stage_prog_data;
 
    /** ralloc context for temporary data used during compile */

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

@@ -72,7 +72,7 @@ public:
                 void *log_data,
                 const struct brw_sampler_prog_key_data *key,
                 struct brw_vue_prog_data *prog_data,
-                nir_shader *shader,
+                const nir_shader *shader,
 		void *mem_ctx,
                 bool no_spills,
                 int shader_time_index);

src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp

@@ -35,7 +35,7 @@ namespace brw {
 vec4_gs_visitor::vec4_gs_visitor(const struct brw_compiler *compiler,
                                  void *log_data,
                                  struct brw_gs_compile *c,
-                                 nir_shader *shader,
+                                 const nir_shader *shader,
                                  void *mem_ctx,
                                  bool no_spills,
                                  int shader_time_index)

src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.h

@@ -71,7 +71,7 @@ public:
    vec4_gs_visitor(const struct brw_compiler *compiler,
                    void *log_data,
                    struct brw_gs_compile *c,
-                   nir_shader *shader,
+                   const nir_shader *shader,
                    void *mem_ctx,
                    bool no_spills,
                    int shader_time_index);

src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp

@@ -1814,7 +1814,7 @@ vec4_visitor::vec4_visitor(const struct brw_compiler *compiler,
                            void *log_data,
                            const struct brw_sampler_prog_key_data *key_tex,
                            struct brw_vue_prog_data *prog_data,
-                           nir_shader *shader,
+                           const nir_shader *shader,
 			   void *mem_ctx,
                            bool no_spills,
                            int shader_time_index)

src/mesa/drivers/dri/i965/brw_vec4_vs_visitor.cpp

@@ -301,7 +301,7 @@ vec4_vs_visitor::vec4_vs_visitor(const struct brw_compiler *compiler,
                                  void *log_data,
                                  const struct brw_vs_prog_key *key,
                                  struct brw_vs_prog_data *vs_prog_data,
-                                 nir_shader *shader,
+                                 const nir_shader *shader,
                                  gl_clip_plane *clip_planes,
                                  void *mem_ctx,
                                  int shader_time_index,

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

@@ -88,7 +88,7 @@ public:
                    void *log_data,
                    const struct brw_vs_prog_key *key,
                    struct brw_vs_prog_data *vs_prog_data,
-                   nir_shader *shader,
+                   const nir_shader *shader,
                    gl_clip_plane *clip_planes,
                    void *mem_ctx,
                    int shader_time_index,

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

@@ -39,7 +39,7 @@ public:
                    void *log_data,
                    struct brw_gs_compile *c,
                    struct gl_shader_program *prog,
-                   nir_shader *shader,
+                   const nir_shader *shader,
                    void *mem_ctx,
                    bool no_spills,
                    int shader_time_index) :