i965/fs: Move uses of brw_compile from do_wm_prog to brw_wm_fs_emit.

The brw_compile structure is closely tied to the Gen4-7 hardware
encoding.  However, do_wm_prog is very generic: it just calls out to
get a compiled program and then uploads it.

This isn't ultimately where we want it, but it's a step in the right
direction: it's now closer to the code generator.

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

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

@@ -2145,15 +2145,18 @@ fs_visitor::run()
    return !failed;
 }
 
-bool
+const unsigned *
 brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
                struct gl_fragment_program *fp,
-	       struct gl_shader_program *prog)
+               struct gl_shader_program *prog,
+               unsigned *final_assembly_size)
 {
    struct intel_context *intel = &brw->intel;
    bool start_busy = false;
    float start_time = 0;
 
+   brw_init_compile(brw, &c->func, c);
+
    if (unlikely(INTEL_DEBUG & DEBUG_PERF)) {
       start_busy = (intel->batch.last_bo &&
                     drm_intel_bo_busy(intel->batch.last_bo));
@@ -2186,7 +2189,7 @@ brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
       _mesa_problem(NULL, "Failed to compile fragment shader: %s\n",
 		    v.fail_msg);
 
-      return false;
+      return NULL;
    }
 
    if (intel->gen >= 5 && c->prog_data.nr_pull_params == 0) {
@@ -2211,7 +2214,7 @@ brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
       }
    }
 
-   return true;
+   return brw_get_program(&c->func, final_assembly_size);
 }
 
 bool

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

@@ -168,13 +168,13 @@ bool do_wm_prog(struct brw_context *brw,
 
    memcpy(&c->key, key, sizeof(*key));
 
-   brw_init_compile(brw, &c->func, c);
-
    c->prog_data.barycentric_interp_modes =
       brw_compute_barycentric_interp_modes(brw, c->key.flat_shade,
                                            &fp->program);
 
-   brw_wm_fs_emit(brw, c, &fp->program, prog);
+   program = brw_wm_fs_emit(brw, c, &fp->program, prog, &program_size);
+   if (program == NULL)
+      return false;
 
    /* Scratch space is used for register spilling */
    if (c->last_scratch) {
@@ -191,10 +191,6 @@ bool do_wm_prog(struct brw_context *brw,
    if (unlikely(INTEL_DEBUG & DEBUG_WM))
       fprintf(stderr, "\n");
 
-   /* get the program
-    */
-   program = brw_get_program(&c->func, &program_size);
-
    brw_upload_cache(&brw->cache, BRW_WM_PROG,
 		    &c->key, sizeof(c->key),
 		    program, program_size,

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

@@ -93,9 +93,16 @@ struct brw_wm_compile {
    GLuint last_scratch;
 };
 
-bool brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
-                    struct gl_fragment_program *fp,
-		    struct gl_shader_program *prog);
+/**
+ * Compile a fragment shader.
+ *
+ * Returns the final assembly and the program's size.
+ */
+const unsigned *brw_wm_fs_emit(struct brw_context *brw,
+                               struct brw_wm_compile *c,
+                               struct gl_fragment_program *fp,
+                               struct gl_shader_program *prog,
+                               unsigned *final_assembly_size);
 
 GLboolean brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog);
 struct gl_shader *brw_new_shader(struct gl_context *ctx, GLuint name, GLuint type);