i965: Remove *_generator::shader field; use prog field instead.

The "shader" field in fs_generator, vec4_generator, and gen8_generator
was only used for one purpose; to figure out if we were compiling an
assembly program or a GLSL shader (shader is NULL for assembly
programs).  And it wasn't being used properly: in vec4 shaders we were
always initializing it based on
prog->_LinkedShaders[MESA_SHADER_FRAGMENT], regardless of whether we
were compiling a geometry shader or a vertex shader.

This patch simplifies things by using the "prog" field instead; this
is also NULL for assembly programs.

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

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

@@ -617,7 +617,6 @@ private:
    struct brw_wm_compile *c;
 
    struct gl_shader_program *prog;
-   struct gl_shader *shader;
    const struct gl_fragment_program *fp;
 
    unsigned dispatch_width; /**< 8 or 16 */

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

@@ -46,8 +46,6 @@ fs_generator::fs_generator(struct brw_context *brw,
 {
    ctx = &brw->ctx;
 
-   shader = prog ? prog->_LinkedShaders[MESA_SHADER_FRAGMENT] : NULL;
-
    mem_ctx = c;
 
    p = rzalloc(mem_ctx, struct brw_compile);
@@ -1332,7 +1330,7 @@ fs_generator::generate_code(exec_list *instructions, FILE *dump_file)
    const void *last_annotation_ir = NULL;
 
    if (unlikely(INTEL_DEBUG & DEBUG_WM)) {
-      if (shader) {
+      if (prog) {
          printf("Native code for fragment shader %d (SIMD%d dispatch):\n",
                 prog->Name, dispatch_width);
       } else if (fp) {
@@ -1373,7 +1371,7 @@ fs_generator::generate_code(exec_list *instructions, FILE *dump_file)
 	    last_annotation_ir = inst->ir;
 	    if (last_annotation_ir) {
 	       printf("   ");
-               if (shader)
+               if (prog)
                   ((ir_instruction *)inst->ir)->print();
                else {
                   const prog_instruction *fpi;

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

@@ -652,7 +652,6 @@ private:
    struct brw_compile *p;
 
    struct gl_shader_program *shader_prog;
-   struct gl_shader *shader;
    const struct gl_program *prog;
 
    struct brw_vec4_prog_data *prog_data;

src/mesa/drivers/dri/i965/brw_vec4_generator.cpp

@@ -142,8 +142,6 @@ vec4_generator::vec4_generator(struct brw_context *brw,
    : brw(brw), shader_prog(shader_prog), prog(prog), prog_data(prog_data),
      mem_ctx(mem_ctx), debug_flag(debug_flag)
 {
-   shader = shader_prog ? shader_prog->_LinkedShaders[MESA_SHADER_VERTEX] : NULL;
-
    p = rzalloc(mem_ctx, struct brw_compile);
    brw_init_compile(brw, p, mem_ctx);
 }
@@ -1257,7 +1255,7 @@ vec4_generator::generate_code(exec_list *instructions)
    const void *last_annotation_ir = NULL;
 
    if (unlikely(debug_flag)) {
-      if (shader) {
+      if (prog) {
          printf("Native code for vertex shader %d:\n", shader_prog->Name);
       } else {
          printf("Native code for vertex program %d:\n", prog->Id);
@@ -1273,7 +1271,7 @@ vec4_generator::generate_code(exec_list *instructions)
 	    last_annotation_ir = inst->ir;
 	    if (last_annotation_ir) {
 	       printf("   ");
-               if (shader) {
+               if (prog) {
                   ((ir_instruction *) last_annotation_ir)->print();
                } else {
                   const prog_instruction *vpi;

src/mesa/drivers/dri/i965/gen8_fs_generator.cpp

@@ -43,8 +43,6 @@ gen8_fs_generator::gen8_fs_generator(struct brw_context *brw,
    : gen8_generator(brw, shader_prog, fp ? &fp->Base : NULL, c), c(c), fp(fp),
      dual_source_output(dual_source_output)
 {
-   shader =
-      shader_prog ? shader_prog->_LinkedShaders[MESA_SHADER_FRAGMENT] : NULL;
 }
 
 gen8_fs_generator::~gen8_fs_generator()
@@ -570,7 +568,7 @@ gen8_fs_generator::generate_code(exec_list *instructions)
    const void *last_annotation_ir = NULL;
 
    if (unlikely(INTEL_DEBUG & DEBUG_WM)) {
-      if (shader) {
+      if (prog) {
          printf("Native code for fragment shader %d (SIMD%d dispatch):\n",
                 shader_prog->Name, dispatch_width);
       } else if (fp) {
@@ -611,7 +609,7 @@ gen8_fs_generator::generate_code(exec_list *instructions)
             last_annotation_ir = ir->ir;
             if (last_annotation_ir) {
                printf("   ");
-               if (shader) {
+               if (prog) {
                   ((ir_instruction *) ir->ir)->print();
                } else if (prog) {
                   const prog_instruction *fpi;

src/mesa/drivers/dri/i965/gen8_generator.h

@@ -133,7 +133,6 @@ protected:
    gen8_instruction *next_inst(unsigned opcode);
 
    struct gl_shader_program *shader_prog;
-   struct gl_shader *shader;
    struct gl_program *prog;
 
    struct brw_context *brw;

src/mesa/drivers/dri/i965/gen8_vec4_generator.cpp

@@ -42,7 +42,6 @@ gen8_vec4_generator::gen8_vec4_generator(struct brw_context *brw,
      prog_data(prog_data),
      debug_flag(debug_flag)
 {
-   shader = shader_prog ? shader_prog->_LinkedShaders[MESA_SHADER_VERTEX] : NULL;
 }
 
 gen8_vec4_generator::~gen8_vec4_generator()
@@ -783,7 +782,7 @@ gen8_vec4_generator::generate_code(exec_list *instructions)
    const void *last_annotation_ir = NULL;
 
    if (unlikely(debug_flag)) {
-      if (shader) {
+      if (prog) {
          printf("Native code for vertex shader %d:\n", shader_prog->Name);
       } else {
          printf("Native code for vertex program %d:\n", prog->Id);
@@ -799,7 +798,7 @@ gen8_vec4_generator::generate_code(exec_list *instructions)
             last_annotation_ir = ir->ir;
             if (last_annotation_ir) {
                printf("   ");
-               if (shader) {
+               if (prog) {
                   ((ir_instruction *) last_annotation_ir)->print();
                } else {
                   const prog_instruction *vpi;