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glsl: Optimize (f2i(trunc x)) into (f2i x).
author
Matt Turner
<mattst88@gmail.com>
Fri, 30 Jan 2015 21:42:19 +0000
(13:42 -0800)
committer
Matt Turner
<mattst88@gmail.com>
Wed, 11 Feb 2015 21:50:19 +0000
(13:50 -0800)
total instructions in shared programs: 5950326 -> 5949286 (-0.02%)
instructions in affected programs: 88264 -> 87224 (-1.18%)
helped: 692
src/glsl/opt_algebraic.cpp
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diff --git
a/src/glsl/opt_algebraic.cpp
b/src/glsl/opt_algebraic.cpp
index
588228c
..
7bc65da
100644
(file)
--- 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;