diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp index d7a1ba80e..aef23e7d2 100644 --- a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp +++ b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp @@ -1994,15 +1994,17 @@ glsl_to_tgsi_visitor::visit(ir_assignment *ir) } else if (ir->rhs->as_expression() && this->instructions.get_tail() && ir->rhs == ((glsl_to_tgsi_instruction *)this->instructions.get_tail())->ir && - type_size(ir->lhs->type) == 1) { + type_size(ir->lhs->type) == 1 && + l.writemask == ((glsl_to_tgsi_instruction *)this->instructions.get_tail())->dst.writemask) { /* To avoid emitting an extra MOV when assigning an expression to a * variable, emit the last instruction of the expression again, but * replace the destination register with the target of the assignment. * Dead code elimination will remove the original instruction. */ - glsl_to_tgsi_instruction *inst; + glsl_to_tgsi_instruction *inst, *new_inst; inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail(); - emit(ir, inst->op, l, inst->src[0], inst->src[1], inst->src[2]); + new_inst = emit(ir, inst->op, l, inst->src[0], inst->src[1], inst->src[2]); + new_inst->saturate = inst->saturate; } else { for (i = 0; i < type_size(ir->lhs->type); i++) { emit(ir, TGSI_OPCODE_MOV, l, r); |