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[GDScript] Perform update-and-assign operations in place when possible.

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This turns two bytecode operations into one by using the assignment
destination directly as the output of the binary operator. This manifests
in operations like `+=`.
This commit is contained in:
Owen Anderson 2023-01-25 00:46:32 -06:00
parent 3ef8d3e4e8
commit 22a0c200c6
1 changed files with 11 additions and 1 deletions
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12
modules/gdscript/gdscript_compiler.cpp
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@ -1171,8 +1171,18 @@ GDScriptCodeGenerator::Address GDScriptCompiler::_parse_expression(CodeGen &code
bool has_operation = assignment->operation != GDScriptParser::AssignmentNode::OP_NONE;
if (has_operation) {
// Perform operation.
GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script));
GDScriptCodeGenerator::Address og_value = _parse_expression(codegen, r_error, assignment->assignee);
if (!has_setter && !assignment->use_conversion_assign) {
// If there's nothing special about the assignment, perform the assignment as part of the operator
gen->write_binary_operator(target, assignment->variant_op, og_value, assigned_value);
if (assigned_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
gen->pop_temporary(); // Pop assigned value if not done before.
}
return GDScriptCodeGenerator::Address();
}
GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script));
gen->write_binary_operator(op_result, assignment->variant_op, og_value, assigned_value);
to_assign = op_result;