From: Ian Romanick <ian.d.romanick@intel.com>
Date: Tue, 20 Jul 2010 20:36:32 +0000 (-0700)
Subject: linker: Do post-link lowering and optimization
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a7ba9a7919110fd619b0e792368aa1f3534080fe;p=mesa.git

linker: Do post-link lowering and optimization

The lowering code should probably be moved elsewhere.
---

diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index eb4eb9d20e1..640e6eee8e0 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -80,6 +80,7 @@ extern "C" {
 #include "hash_table.h"
 #include "shader_api.h"
 #include "linker.h"
+#include "ir_optimization.h"
 
 /**
  * Visitor that determines whether or not a variable is ever written.
@@ -1223,6 +1224,43 @@ link_shaders(struct gl_shader_program *prog)
    }
 
    /* FINISHME: Perform whole-program optimization here. */
+   for (unsigned i = 0; i < prog->_NumLinkedShaders; i++) {
+      /* Optimization passes */
+      bool progress;
+      exec_list *ir = prog->_LinkedShaders[i]->ir;
+
+      /* Lowering */
+      do_mat_op_to_vec(ir);
+      do_mod_to_fract(ir);
+      do_div_to_mul_rcp(ir);
+
+      do {
+	 progress = false;
+
+	 progress = do_function_inlining(ir) || progress;
+	 progress = do_if_simplification(ir) || progress;
+	 progress = do_copy_propagation(ir) || progress;
+	 progress = do_dead_code_local(ir) || progress;
+#if 0
+	 progress = do_dead_code_unlinked(state, ir) || progress;
+#endif
+	 progress = do_constant_variable_unlinked(ir) || progress;
+	 progress = do_constant_folding(ir) || progress;
+	 progress = do_if_return(ir) || progress;
+#if 0
+	 if (ctx->Shader.EmitNoIfs)
+	    progress = do_if_to_cond_assign(ir) || progress;
+#endif
+
+	 progress = do_vec_index_to_swizzle(ir) || progress;
+	 /* Do this one after the previous to let the easier pass handle
+	  * constant vector indexing.
+	  */
+	 progress = do_vec_index_to_cond_assign(ir) || progress;
+
+	 progress = do_swizzle_swizzle(ir) || progress;
+      } while (progress);
+   }
 
    assign_uniform_locations(prog);