#include"commutativity.h"

#include"ast.h"

static void commutativity_visitor(AST **nptr, AST *stmt, AST *stmtPrev, AST *chunk, AST *tlc, void *ud) {
	AST *n = *nptr;
	
	if(n->nodeKind == AST_EXPR_BINARY_OP) {
		if(binop_is_commutative(n->exprBinOp.operator)) {
			if(n->exprBinOp.operands[0]->nodeKind == AST_EXPR_PRIMITIVE && n->exprBinOp.operands[1]->nodeKind != AST_EXPR_PRIMITIVE) {
				AST *tmp = n->exprBinOp.operands[0];
				n->exprBinOp.operands[0] = n->exprBinOp.operands[1];
				n->exprBinOp.operands[1] = tmp;
			}
		}
	}
}
void ast_commutativity_pass(AST *tlc) {
	generic_visitor(&tlc, NULL, NULL, tlc, tlc, NULL, NULL, commutativity_visitor);
}