diff options
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 37b2f02c6e4..22d2dbfe6e3 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])); + this->progress = true; + return swizzle_if_required(ir, temp); } break; |