i965: Make the FS and VS share a few visitor/instruction fields.

This will let us reuse brw_fs_cfg.cpp from brw_vec4_*.

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

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

@@ -45,7 +45,6 @@ extern "C" {
 #include "brw_eu.h"
 #include "brw_wm.h"
 }
-#include "brw_shader.h"
 #include "brw_fs.h"
 #include "glsl/glsl_types.h"
 #include "glsl/ir_print_visitor.h"

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

@@ -45,6 +45,7 @@ extern "C" {
 #include "brw_context.h"
 #include "brw_eu.h"
 #include "brw_wm.h"
+#include "brw_shader.h"
 }
 #include "glsl/glsl_types.h"
 #include "glsl/ir.h"
@@ -124,7 +125,7 @@ static const fs_reg reg_undef;
 static const fs_reg reg_null_f(ARF, BRW_ARF_NULL, BRW_REGISTER_TYPE_F);
 static const fs_reg reg_null_d(ARF, BRW_ARF_NULL, BRW_REGISTER_TYPE_D);
 
-class fs_inst : public exec_node {
+class fs_inst : public backend_instruction {
 public:
    /* Callers of this ralloc-based new need not call delete. It's
     * easier to just ralloc_free 'ctx' (or any of its ancestors). */
@@ -154,7 +155,6 @@ public:
    bool is_tex();
    bool is_math();
 
-   enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
    fs_reg dst;
    fs_reg src[3];
    bool saturate;
@@ -182,7 +182,7 @@ public:
    /** @} */
 };
 
-class fs_visitor : public ir_visitor
+class fs_visitor : public backend_visitor
 {
 public:
 
@@ -363,16 +363,8 @@ public:
    void setup_builtin_uniform_values(ir_variable *ir);
    int implied_mrf_writes(fs_inst *inst);
 
-   struct brw_context *brw;
    const struct gl_fragment_program *fp;
-   struct intel_context *intel;
-   struct gl_context *ctx;
    struct brw_wm_compile *c;
-   struct brw_compile *p;
-   struct brw_shader *shader;
-   struct gl_shader_program *prog;
-   void *mem_ctx;
-   exec_list instructions;
 
    /* Delayed setup of c->prog_data.params[] due to realloc of
     * ParamValues[] during compile.

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

@@ -44,7 +44,6 @@ extern "C" {
 #include "brw_eu.h"
 #include "brw_wm.h"
 }
-#include "brw_shader.h"
 #include "brw_fs.h"
 #include "glsl/glsl_types.h"
 #include "glsl/ir_optimization.h"

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

@@ -27,6 +27,31 @@
 
 #pragma once
 
+class backend_instruction : public exec_node {
+public:
+   enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
+};
+
+class backend_visitor : public ir_visitor {
+public:
+
+   struct brw_context *brw;
+   struct intel_context *intel;
+   struct gl_context *ctx;
+   struct brw_compile *p;
+   struct brw_shader *shader;
+   struct gl_shader_program *prog;
+
+   /** ralloc context for temporary data used during compile */
+   void *mem_ctx;
+
+   /**
+    * List of either fs_inst or vec4_instruction (inheriting from
+    * backend_instruction)
+    */
+   exec_list instructions;
+};
+
 int brw_type_for_base_type(const struct glsl_type *type);
 uint32_t brw_conditional_for_comparison(unsigned int op);
 uint32_t brw_math_function(enum opcode op);

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

@@ -144,7 +144,7 @@ public:
    src_reg *reladdr;
 };
 
-class vec4_instruction : public exec_node {
+class vec4_instruction : public backend_instruction {
 public:
    /* Callers of this ralloc-based new need not call delete. It's
     * easier to just ralloc_free 'ctx' (or any of its ancestors). */
@@ -167,7 +167,6 @@ public:
    struct brw_reg get_dst(void);
    struct brw_reg get_src(int i);
 
-   enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
    dst_reg dst;
    src_reg src[3];
 
@@ -198,7 +197,7 @@ public:
    bool is_math();
 };
 
-class vec4_visitor : public ir_visitor
+class vec4_visitor : public backend_visitor
 {
 public:
    vec4_visitor(struct brw_vs_compile *c,
@@ -215,17 +214,9 @@ public:
       return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_D));
    }
 
-   struct brw_context *brw;
    const struct gl_vertex_program *vp;
-   struct intel_context *intel;
-   struct gl_context *ctx;
    struct brw_vs_compile *c;
    struct brw_vs_prog_data *prog_data;
-   struct brw_compile *p;
-   struct brw_shader *shader;
-   struct gl_shader_program *prog;
-   void *mem_ctx;
-   exec_list instructions;
 
    char *fail_msg;
    bool failed;