10.2.1 Trees

All GENERIC trees have two fields in common. First, TREE_CHAIN is a pointer that can be used as a singly-linked list to other trees. The other is TREE_TYPE. Many trees store the type of an expression or declaration in this field.

These are some other functions for handling trees:

tree_size

Return the number of bytes a tree takes.

build0

build1

build2

build3

build4

build5

build6

These functions build a tree and supply values to put in each parameter. The basic signature is ‘code, type, [operands]’. code is the TREE_CODE, and type is a tree representing the TREE_TYPE. These are followed by the operands, each of which is also a tree.