From 44577c48573acdbc8a708e6613f367507e9eafc5 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Sat, 18 Jan 2014 11:00:51 -0800 Subject: [PATCH] glsl: Optimize lrp(x, x, coefficient) --> x. total instructions in shared programs: 1627754 -> 1624534 (-0.20%) instructions in affected programs: 45748 -> 42528 (-7.04%) GAINED: 3 LOST: 0 (serious sam, humus domino demo) Reviewed-by: Matt Turner --- src/glsl/opt_algebraic.cpp | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 953b03c2943..392051f4f05 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -553,6 +553,8 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) return ir->operands[0]; } else if (is_vec_one(op_const[2])) { return ir->operands[1]; + } else if (ir->operands[0]->equals(ir->operands[1])) { + return ir->operands[0]; } break; -- 2.30.2