From fc61b41a956f05d57afcb6af7eb61637b4936fb4 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Sat, 27 Feb 2016 11:23:32 -0800
Subject: [PATCH] mesa: Remove EmitCondCodes.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Acked-by: Brian Paul <brianp@vmware.com>
---
 docs/shading.html                        | 28 ------------------------
 src/mesa/drivers/dri/i915/i915_context.c |  1 -
 src/mesa/drivers/dri/i965/brw_compiler.c |  1 -
 src/mesa/main/mtypes.h                   |  1 -
 src/mesa/program/ir_to_mesa.cpp          | 24 ++------------------
 5 files changed, 2 insertions(+), 53 deletions(-)

diff --git a/docs/shading.html b/docs/shading.html
index df23694ea89..cf989ce9029 100644
--- a/docs/shading.html
+++ b/docs/shading.html
@@ -209,34 +209,6 @@ The final vertex and fragment programs may be interpreted in software
 (see drivers/dri/i915/i915_fragprog.c for example).
 </p>
 
-<h3>Code Generation Options</h3>
-
-<p>
-Internally, there are several options that control the compiler's code
-generation and instruction selection.
-These options are seen in the gl_shader_state struct and may be set
-by the device driver to indicate its preferences:
-
-<pre>
-struct gl_shader_state
-{
-   ...
-   /** Driver-selectable options: */
-   GLboolean EmitCondCodes;
-};
-</pre>
-
-<dl>
-<dt>EmitCondCodes</dt>
-<dd>
-If set, condition codes (ala GL_NV_fragment_program) will be used for
-branching and looping.
-Otherwise, ordinary registers will be used (the IF instruction will
-examine the first operand's X component and do the if-part if non-zero).
-</dd>
-</dl>
-
-
 <h2 id="validation">Compiler Validation</h2>
 
 <p>
diff --git a/src/mesa/drivers/dri/i915/i915_context.c b/src/mesa/drivers/dri/i915/i915_context.c
index 57b033c07ea..83aaf9ea5a6 100644
--- a/src/mesa/drivers/dri/i915/i915_context.c
+++ b/src/mesa/drivers/dri/i915/i915_context.c
@@ -254,7 +254,6 @@ i915CreateContext(int api,
    /* FINISHME: Are there other options that should be enabled for software
     * FINISHME: vertex shaders?
     */
-   ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitCondCodes = true;
    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoIndirectSampler =
       true;
 
diff --git a/src/mesa/drivers/dri/i965/brw_compiler.c b/src/mesa/drivers/dri/i965/brw_compiler.c
index 1489207569c..2f05a26e0e0 100644
--- a/src/mesa/drivers/dri/i965/brw_compiler.c
+++ b/src/mesa/drivers/dri/i965/brw_compiler.c
@@ -143,7 +143,6 @@ brw_compiler_create(void *mem_ctx, const struct brw_device_info *devinfo)
       compiler->glsl_compiler_options[i].MaxIfDepth =
          devinfo->gen < 6 ? 16 : UINT_MAX;
 
-      compiler->glsl_compiler_options[i].EmitCondCodes = true;
       compiler->glsl_compiler_options[i].EmitNoNoise = true;
       compiler->glsl_compiler_options[i].EmitNoMainReturn = true;
       compiler->glsl_compiler_options[i].EmitNoIndirectInput = true;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 12d3863719b..d5f0b628d92 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2946,7 +2946,6 @@ struct gl_pipeline_shader_state
 struct gl_shader_compiler_options
 {
    /** Driver-selectable options: */
-   GLboolean EmitCondCodes;             /**< Use condition codes? */
    GLboolean EmitNoLoops;
    GLboolean EmitNoFunctions;
    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 4db62504ac7..6d33b1b071a 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -2124,32 +2124,12 @@ ir_to_mesa_visitor::visit(ir_discard *ir)
 void
 ir_to_mesa_visitor::visit(ir_if *ir)
 {
-   ir_to_mesa_instruction *cond_inst, *if_inst;
-   ir_to_mesa_instruction *prev_inst;
-
-   prev_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();
+   ir_to_mesa_instruction *if_inst;
 
    ir->condition->accept(this);
    assert(this->result.file != PROGRAM_UNDEFINED);
 
-   if (this->options->EmitCondCodes) {
-      cond_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();
-
-      /* See if we actually generated any instruction for generating
-       * the condition.  If not, then cook up a move to a temp so we
-       * have something to set cond_update on.
-       */
-      if (cond_inst == prev_inst) {
-	 src_reg temp = get_temp(glsl_type::bool_type);
-	 cond_inst = emit(ir->condition, OPCODE_MOV, dst_reg(temp), result);
-      }
-      cond_inst->cond_update = GL_TRUE;
-
-      if_inst = emit(ir->condition, OPCODE_IF);
-      if_inst->dst.cond_mask = COND_NE;
-   } else {
-      if_inst = emit(ir->condition, OPCODE_IF, undef_dst, this->result);
-   }
+   if_inst = emit(ir->condition, OPCODE_IF, undef_dst, this->result);
 
    this->instructions.push_tail(if_inst);
 
-- 
2.30.2