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a8dd994c | 1 | /* Routines for expanding from SSA form to RTL. |
711789cc | 2 | Copyright (C) 2009-2013 Free Software Foundation, Inc. |
a8dd994c | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | ||
8f6fa493 | 21 | #ifndef GCC_TREE_OUTOF_SSA_H |
22 | #define GCC_TREE_OUTOF_SSA_H | |
a8dd994c | 23 | |
a8dd994c | 24 | |
25 | /* This structure (of which only a singleton SA exists) is used to | |
26 | pass around information between the outof-SSA functions, cfgexpand | |
27 | and expand itself. */ | |
28 | struct ssaexpand | |
29 | { | |
30 | /* The computed partitions of SSA names are stored here. */ | |
31 | var_map map; | |
32 | ||
dfdbf3fd | 33 | /* For an SSA name version V bit V is set iff TER decided that |
34 | its definition should be forwarded. */ | |
35 | bitmap values; | |
a8dd994c | 36 | |
37 | /* For a partition number I partition_to_pseudo[I] contains the | |
38 | RTL expression of the allocated space of it (either a MEM or | |
39 | a pseudos REG). */ | |
40 | rtx *partition_to_pseudo; | |
41 | ||
42 | /* If partition I contains an SSA name that has a default def, | |
43 | bit I will be set in this bitmap. */ | |
44 | bitmap partition_has_default_def; | |
45 | }; | |
46 | ||
47 | /* This is the singleton described above. */ | |
48 | extern struct ssaexpand SA; | |
49 | ||
50 | /* Returns the RTX expression representing the storage of the outof-SSA | |
51 | partition that the SSA name EXP is a member of. */ | |
52 | static inline rtx | |
53 | get_rtx_for_ssa_name (tree exp) | |
54 | { | |
55 | int p = partition_find (SA.map->var_partition, SSA_NAME_VERSION (exp)); | |
56 | if (SA.map->partition_to_view) | |
57 | p = SA.map->partition_to_view[p]; | |
58 | gcc_assert (p != NO_PARTITION); | |
59 | return SA.partition_to_pseudo[p]; | |
60 | } | |
61 | ||
62 | /* If TER decided to forward the definition of SSA name EXP this function | |
63 | returns the defining statement, otherwise NULL. */ | |
64 | static inline gimple | |
65 | get_gimple_for_ssa_name (tree exp) | |
66 | { | |
67 | int v = SSA_NAME_VERSION (exp); | |
dfdbf3fd | 68 | if (SA.values && bitmap_bit_p (SA.values, v)) |
69 | return SSA_NAME_DEF_STMT (exp); | |
a8dd994c | 70 | return NULL; |
71 | } | |
72 | ||
f7373a91 | 73 | extern bool ssa_is_replaceable_p (gimple stmt); |
74 | extern void finish_out_of_ssa (struct ssaexpand *sa); | |
75 | extern unsigned int rewrite_out_of_ssa (struct ssaexpand *sa); | |
76 | extern void expand_phi_nodes (struct ssaexpand *sa); | |
a8dd994c | 77 | |
8f6fa493 | 78 | #endif /* GCC_TREE_OUTOF_SSA_H */ |