From be80f69ecdb5544509d762ce5c832c4ad3abbe9b Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Fri, 22 Aug 2014 14:30:38 -0700 Subject: [PATCH] glsl: Optimize scalar all_equal/any_nequal into equal/nequal. Cuts an instruction from two shaders in Tesseract, by allowing the (x+y) cmp 0 -> x cmp -y optimization to take place. instructions in affected programs: 1198 -> 1194 (-0.33%) Reviewed-by: Eric Anholt --- src/glsl/opt_algebraic.cpp | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 430f5cb9790..c4f883b9a8e 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -584,6 +584,16 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) } break; + case ir_binop_all_equal: + case ir_binop_any_nequal: + if (ir->operands[0]->type->is_scalar() && + ir->operands[1]->type->is_scalar()) + return new(mem_ctx) ir_expression(ir->operation == ir_binop_all_equal + ? ir_binop_equal : ir_binop_nequal, + ir->operands[0], + ir->operands[1]); + break; + case ir_binop_rshift: case ir_binop_lshift: /* 0 >> x == 0 */ -- 2.30.2