diff options
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index d706a6ad13c..3e5802e1818 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -85,6 +85,12 @@ is_vec_one(ir_constant *ir) } static inline bool +is_vec_negative_one(ir_constant *ir) +{ + return (ir == NULL) ? false : ir->is_negative_one(); +} + +static inline bool is_vec_basis(ir_constant *ir) { return (ir == NULL) ? false : ir->is_basis(); @@ -287,6 +293,23 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) this->progress = true; return ir_constant::zero(ir, ir->type); } + if (is_vec_negative_one(op_const[0])) { + this->progress = true; + temp = new(mem_ctx) ir_expression(ir_unop_neg, + ir->operands[1]->type, + ir->operands[1], + NULL); + return swizzle_if_required(ir, temp); + } + if (is_vec_negative_one(op_const[1])) { + this->progress = true; + temp = new(mem_ctx) ir_expression(ir_unop_neg, + ir->operands[0]->type, + ir->operands[0], + NULL); + return swizzle_if_required(ir, temp); + } + /* Reassociate multiplication of constants so that we can do * constant folding. |