+ The type of STEP, INDEX and OFFSET is sizetype. The type of BASE is
+ sizetype or a pointer type (if SYMBOL is NULL).
+
+ The sixth argument is the reference to the original memory access, which
+ is preserved for the purpose of alias analysis. */
+
+DEFTREECODE (TARGET_MEM_REF, "target_mem_ref", tcc_reference, 6)
+
+/* The ordering of the codes between OMP_PARALLEL and OMP_CRITICAL is
+ exposed to TREE_RANGE_CHECK. */
+/* OpenMP - #pragma omp parallel [clause1 ... clauseN]
+ Operand 0: OMP_PARALLEL_BODY: Code to be executed by all threads.
+ Operand 1: OMP_PARALLEL_CLAUSES: List of clauses. */
+
+DEFTREECODE (OMP_PARALLEL, "omp_parallel", tcc_statement, 2)
+
+/* OpenMP - #pragma omp task [clause1 ... clauseN]
+ Operand 0: OMP_TASK_BODY: Code to be executed by all threads.
+ Operand 1: OMP_TASK_CLAUSES: List of clauses. */
+
+DEFTREECODE (OMP_TASK, "omp_task", tcc_statement, 2)
+
+/* OpenMP - #pragma omp for [clause1 ... clauseN]
+ Operand 0: OMP_FOR_BODY: Loop body.
+ Operand 1: OMP_FOR_CLAUSES: List of clauses.
+ Operand 2: OMP_FOR_INIT: Initialization code of the form
+ VAR = N1.
+ Operand 3: OMP_FOR_COND: Loop conditional expression of the form
+ VAR { <, >, <=, >= } N2.
+ Operand 4: OMP_FOR_INCR: Loop index increment of the form
+ VAR { +=, -= } INCR.
+ Operand 5: OMP_FOR_PRE_BODY: Filled by the gimplifier with things
+ from INIT, COND, and INCR that are technically part of the
+ OMP_FOR structured block, but are evaluated before the loop
+ body begins.
+
+ VAR must be an integer or pointer variable, which is implicitly thread
+ private. N1, N2 and INCR are required to be loop invariant integer
+ expressions that are evaluated without any synchronization.
+ The evaluation order, frequency of evaluation and side-effects are
+ unspecified by the standard. */
+DEFTREECODE (OMP_FOR, "omp_for", tcc_statement, 6)
+
+/* OpenMP - #pragma omp sections [clause1 ... clauseN]
+ Operand 0: OMP_SECTIONS_BODY: Sections body.
+ Operand 1: OMP_SECTIONS_CLAUSES: List of clauses. */
+DEFTREECODE (OMP_SECTIONS, "omp_sections", tcc_statement, 2)
+
+/* OpenMP - #pragma omp single
+ Operand 0: OMP_SINGLE_BODY: Single section body.
+ Operand 1: OMP_SINGLE_CLAUSES: List of clauses. */
+DEFTREECODE (OMP_SINGLE, "omp_single", tcc_statement, 2)
+
+/* OpenMP - #pragma omp section
+ Operand 0: OMP_SECTION_BODY: Section body. */
+DEFTREECODE (OMP_SECTION, "omp_section", tcc_statement, 1)
+
+/* OpenMP - #pragma omp master
+ Operand 0: OMP_MASTER_BODY: Master section body. */
+DEFTREECODE (OMP_MASTER, "omp_master", tcc_statement, 1)
+
+/* OpenMP - #pragma omp ordered
+ Operand 0: OMP_ORDERED_BODY: Master section body. */
+DEFTREECODE (OMP_ORDERED, "omp_ordered", tcc_statement, 1)
+
+/* OpenMP - #pragma omp critical [name]
+ Operand 0: OMP_CRITICAL_BODY: Critical section body.
+ Operand 1: OMP_CRITICAL_NAME: Identifier for critical section. */
+DEFTREECODE (OMP_CRITICAL, "omp_critical", tcc_statement, 2)
+
+/* OpenMP - #pragma omp atomic
+ Operand 0: The address at which the atomic operation is to be performed.
+ This address should be stabilized with save_expr.
+ Operand 1: The expression to evaluate. When the old value of the object
+ at the address is used in the expression, it should appear as if
+ build_fold_indirect_ref of the address. */
+DEFTREECODE (OMP_ATOMIC, "omp_atomic", tcc_statement, 2)
+
+/* OpenMP clauses. */
+DEFTREECODE (OMP_CLAUSE, "omp_clause", tcc_exceptional, 0)