i965: Refactor debug dumping of GLSL IR.

This was only going to get worse when tesselation shows up, and was
causing too much extra duplication in my stderr changes coming up.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

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

@@ -3519,17 +3519,8 @@ brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
    if (prog)
       shader = (brw_shader *) prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
 
-   if (unlikely(INTEL_DEBUG & DEBUG_WM)) {
-      if (prog) {
-         printf("GLSL IR for native fragment shader %d:\n", prog->Name);
-         _mesa_print_ir(shader->base.ir, NULL);
-         printf("\n\n");
-      } else {
-         printf("ARB_fragment_program %d ir for native fragment shader\n",
-                fp->Base.Id);
-         _mesa_print_program(&fp->Base);
-      }
-   }
+   if (unlikely(INTEL_DEBUG & DEBUG_WM))
+      brw_dump_ir(brw, "fragment", prog, &shader->base, &fp->Base);
 
    /* Now the main event: Visit the shader IR and generate our FS IR for it.
     */

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

@@ -34,10 +34,12 @@
 #include "main/enums.h"
 #include "main/shaderobj.h"
 #include "program/prog_parameter.h"
+#include "program/prog_print.h"
 #include "program/program.h"
 #include "program/programopt.h"
 #include "tnl/tnl.h"
 #include "glsl/ralloc.h"
+#include "glsl/ir.h"
 
 #include "brw_context.h"
 #include "brw_wm.h"
@@ -583,3 +585,19 @@ brw_stage_prog_data_free(const void *p)
    ralloc_free(prog_data->param);
    ralloc_free(prog_data->pull_param);
 }
+
+void
+brw_dump_ir(struct brw_context *brw, const char *stage,
+            struct gl_shader_program *shader_prog,
+            struct gl_shader *shader, struct gl_program *prog)
+{
+   if (shader_prog) {
+      printf("GLSL IR for native %s shader %d:\n", stage, shader_prog->Name);
+      _mesa_print_ir(shader->ir, NULL);
+      printf("\n\n");
+   } else {
+      printf("ARB_%s_program %d ir for native %s shader\n",
+             stage, prog->Id, stage);
+      _mesa_print_program(prog);
+   }
+}

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

@@ -87,6 +87,11 @@ brw_stage_prog_data_compare(const struct brw_stage_prog_data *a,
 void
 brw_stage_prog_data_free(const void *prog_data);
 
+void
+brw_dump_ir(struct brw_context *brw, const char *stage,
+            struct gl_shader_program *shader_prog,
+            struct gl_shader *shader, struct gl_program *prog);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

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

@@ -1663,17 +1663,8 @@ brw_vs_emit(struct brw_context *brw,
    if (prog)
       shader = (brw_shader *) prog->_LinkedShaders[MESA_SHADER_VERTEX];
 
-   if (unlikely(INTEL_DEBUG & DEBUG_VS)) {
-      if (prog) {
-         printf("GLSL IR for native vertex shader %d:\n", prog->Name);
-         _mesa_print_ir(shader->base.ir, NULL);
-         printf("\n\n");
-      } else {
-         printf("ARB_vertex_program %d for native vertex shader\n",
-                c->vp->program.Base.Id);
-         _mesa_print_program(&c->vp->program.Base);
-      }
-   }
+   if (unlikely(INTEL_DEBUG & DEBUG_VS))
+      brw_dump_ir(brw, "vertex", prog, &shader->base, &c->vp->program.Base);
 
    vec4_vs_visitor v(brw, c, prog_data, prog, shader, mem_ctx);
    if (!v.run()) {

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

@@ -588,11 +588,8 @@ brw_gs_emit(struct brw_context *brw,
    struct brw_shader *shader =
       (brw_shader *) prog->_LinkedShaders[MESA_SHADER_GEOMETRY];
 
-   if (unlikely(INTEL_DEBUG & DEBUG_GS)) {
-      printf("GLSL IR for native geometry shader %d:\n", prog->Name);
-      _mesa_print_ir(shader->base.ir, NULL);
-      printf("\n\n");
-   }
+   if (unlikely(INTEL_DEBUG & DEBUG_GS))
+      brw_dump_ir(brw, "geometry", prog, &shader->base, NULL);
 
    /* Compile the geometry shader in DUAL_OBJECT dispatch mode, if we can do
     * so without spilling. If the GS invocations count > 1, then we can't use