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/* This file contains the definitions and documentation for the
additional tree codes used in the GNU C compiler (see tree.def
for the standard codes).
Copyright (C) 1987-2017 Free Software Foundation, Inc.
Written by Benjamin Chelf <>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<>. */
/* Tree nodes used in the C frontend. These are also shared with the
C++ and Objective C frontends. */
/* A C_MAYBE_CONST_EXPR, currently only used for C and Objective C,
tracks information about constancy of an expression and VLA type
sizes or VM expressions from typeof that need to be evaluated
before the main expression. It is used during parsing and removed
in c_fully_fold. C_MAYBE_CONST_EXPR_PRE is the expression to
evaluate first, if not NULL; C_MAYBE_CONST_EXPR_EXPR is the main
expression. If C_MAYBE_CONST_EXPR_INT_OPERANDS is set then the
expression may be used in an unevaluated part of an integer
constant expression, but not in an evaluated part. If
C_MAYBE_CONST_EXPR_NON_CONST is set then the expression contains
something that cannot occur in an evaluated part of a constant
expression (or outside of sizeof in C90 mode); otherwise it does
not. */
DEFTREECODE (C_MAYBE_CONST_EXPR, "c_maybe_const_expr", tcc_expression, 2)
/* An EXCESS_PRECISION_EXPR, currently only used for C and Objective
C, represents an expression evaluated in greater range or precision
than its type. The type of the EXCESS_PRECISION_EXPR is the
semantic type while the operand represents what is actually being
evaluated. */
DEFTREECODE (EXCESS_PRECISION_EXPR, "excess_precision_expr", tcc_expression, 1)
/* Used to represent a user-defined literal.
The operands are an IDENTIFIER for the suffix, the VALUE of the literal,
and for numeric literals the original string representation of the
number. */
DEFTREECODE (USERDEF_LITERAL, "userdef_literal", tcc_exceptional, 3)
/* Represents a 'sizeof' expression during C++ template expansion,
or for the purpose of -Wsizeof-pointer-memaccess warning. */
DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", tcc_expression, 1)
/* Array Notation expression.
Operand 0 is the array.
Operand 1 is the starting array index.
Operand 2 contains the number of elements you need to access.
Operand 3 is the stride. */
DEFTREECODE (ARRAY_NOTATION_REF, "array_notation_ref", tcc_reference, 4)
Local variables: