Mesa (master): glsl: Optimize (f2i(trunc x)) into (f2i x).
Matt Turner
mattst88 at kemper.freedesktop.org
Wed Feb 11 22:38:55 UTC 2015
Module: Mesa
Branch: master
Commit: 69ad5fd4ce33aeab73d9eb546072d77e73e3a730
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=69ad5fd4ce33aeab73d9eb546072d77e73e3a730
Author: Matt Turner <mattst88 at gmail.com>
Date: Fri Jan 30 13:42:19 2015 -0800
glsl: Optimize (f2i(trunc x)) into (f2i x).
total instructions in shared programs: 5950326 -> 5949286 (-0.02%)
instructions in affected programs: 88264 -> 87224 (-1.18%)
helped: 692
---
src/glsl/opt_algebraic.cpp | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp
index 588228c..7bc65da 100644
--- a/src/glsl/opt_algebraic.cpp
+++ b/src/glsl/opt_algebraic.cpp
@@ -376,6 +376,15 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
}
break;
+ case ir_unop_f2i:
+ case ir_unop_f2u:
+ if (op_expr[0] && op_expr[0]->operation == ir_unop_trunc) {
+ return new(mem_ctx) ir_expression(ir->operation,
+ ir->type,
+ op_expr[0]->operands[0]);
+ }
+ break;
+
case ir_unop_logic_not: {
enum ir_expression_operation new_op = ir_unop_logic_not;
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