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glsl: Apply the transformation "(a && a) -> a" in opt_algebraic.

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Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Eric Anholt 2013-10-31 09:32:42 -07:00
parent ee27048262
commit 58a98d32e4
1 changed files with 3 additions and 1 deletions
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4
src/glsl/opt_algebraic.cpp
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@ -357,7 +357,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
break;
case ir_binop_logic_and:
/* FINISHME: Also simplify (a && a) to (a). */
if (is_vec_one(op_const[0])) {
return ir->operands[1];
} else if (is_vec_one(op_const[1])) {
@ -371,6 +370,9 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
*/
return logic_not(logic_or(op_expr[0]->operands[0],
op_expr[1]->operands[0]));
} else if (ir->operands[0]->equals(ir->operands[1])) {
/* (a && a) == a */
return ir->operands[0];
}
break;