1 /* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
2 ** All rights reserved.
4 ** Authors: Martin Trapp, Christian Schaefer
6 ** irgmod.h: ir graph modification
16 /* Exchanges two nodes by conserving edges leaving old (i.e., pointers
17 pointing to old). Turns the old node into an Id. Requires that
18 current_ir_graph is set properly. */
19 INLINE void exchange (ir_node *old, ir_node *nw);
21 /* Turns a node into a "useless" Tuple. The Tuple node just forms a tuple
22 from several inputs. The predecessors of the tuple have to be
23 set by hand. The block predecessor automatically remains the same.
24 This is useful if a node returning a tuple is removed, but the Projs
25 extracting values from the tuple are not available. */
26 void turn_into_tuple (ir_node *node, int arity);
28 /* Walks over the passed ir graph and collects all Phi nodes as a
29 list built with the link field in their corresponding block.
30 Further it collects all Proj nodes in a list of the node producing
31 the tuple. In case of nested tuples the Projs are collected in the
32 node producing the outermost Tuple. */
33 void collect_phiprojs(ir_graph *irg);
35 /* Parts a block into two. This is useful to insert other blocks within a
37 Adds a new block (new_block) in the control flow before the block
38 (old_block) of node. Moves node and its predecessors from old_block to
39 new_block. Moves all Projs that depend on moved nodes and are in old_block
40 to new_block. Moves all Phi nodes from old_block to new_block. To achieve
41 this the routine assumes that all Phi nodes are in a list (using the link
42 field) in the link field of old_block. Further it assumes that all Proj nodes
43 are accessible by the link field of the nodes producing the Tuple. This
44 can be established by collect_phiprojs(). part_block conserves this property.
45 Adds a Jmp node to new_block that jumps to old_block.
46 Assumes that node is contained in current_ir_graph. Sets current_block in
47 this ir_graph to new_block. */
48 void part_block(ir_node *node);
50 #endif /* ifndef _IRGMOD_H_ */