On Thu, Oct 24, 2013 at 2:19 AM, Matt Turner <matts...@gmail.com> wrote:
> A few Serious Sam 3 shaders affected:
>
> instructions in affected programs: 4384 -> 4344 (-0.91%)
> ---
> src/glsl/opt_algebraic.cpp | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp
> index 37b2f02..3bf0689 100644
> --- a/src/glsl/opt_algebraic.cpp
> +++ b/src/glsl/opt_algebraic.cpp
> @@ -32,8 +32,11 @@
> #include "ir_visitor.h"
> #include "ir_rvalue_visitor.h"
> #include "ir_optimization.h"
> +#include "ir_builder.h"
> #include "glsl_types.h"
>
> +using namespace ir_builder;
> +
> namespace {
>
> /**
> @@ -436,6 +439,15 @@ ir_algebraic_visitor::handle_expression(ir_expression
> *ir)
>
> this->progress = true;
> return new(mem_ctx) ir_constant(ir->type, &data);
> + } else if (op_expr[0] && op_expr[0]->operation == ir_unop_logic_not &&
> + op_expr[1] && op_expr[1]->operation == ir_unop_logic_not) {
> + /* De Morgan's Law:
> + * (not A) or (not B) === not (A and B)
> + */
> + temp = logic_not(logic_and(op_expr[0]->operands[0],
> + op_expr[1]->operands[0]));
> + return swizzle_if_required(ir, temp);
> + this->progress = true;
Returning before reporting progress?
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