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annotate gcc/ipa-ref.h @ 67:f6334be47118

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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 22 Mar 2011 17:18:12 +0900
parents b7f97abdc517
children 04ced10e8804
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63
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
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1 /* IPA reference lists.
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2 Copyright (C) 2010
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3 Free Software Foundation, Inc.
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4 Contributed by Jan Hubicka
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 struct cgraph_node;
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23 struct varpool_node;
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24
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25 /* How the reference is done. */
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26 enum GTY(()) ipa_ref_use
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27 {
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28 IPA_REF_LOAD,
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29 IPA_REF_STORE,
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30 IPA_REF_ADDR
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31 };
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32
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33 /* Type of refering or refered type. */
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34 enum GTY(()) ipa_ref_type
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35 {
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36 IPA_REF_CGRAPH,
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37 IPA_REF_VARPOOL
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38 };
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39
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40 /* We can have references spanning both callgraph and varpool,
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41 so all pointers needs to be of both types. */
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42 union GTY(()) ipa_ref_ptr_u
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43 {
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44 struct cgraph_node * GTY((tag ("IPA_REF_CGRAPH"))) cgraph_node;
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45 struct varpool_node * GTY((tag ("IPA_REF_VARPOOL"))) varpool_node;
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46 };
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47
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48 /* Record of reference in callgraph or varpool. */
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49 struct GTY(()) ipa_ref
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50 {
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51 union ipa_ref_ptr_u GTY ((desc ("%1.refering_type"))) refering;
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52 union ipa_ref_ptr_u GTY ((desc ("%1.refered_type"))) refered;
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53 gimple stmt;
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54 unsigned int refered_index;
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55 ENUM_BITFIELD (ipa_ref_type) refering_type:1;
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56 ENUM_BITFIELD (ipa_ref_type) refered_type:1;
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57 ENUM_BITFIELD (ipa_ref_use) use:2;
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58 };
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59
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60 typedef struct ipa_ref ipa_ref_t;
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61 typedef struct ipa_ref *ipa_ref_ptr;
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62
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63 DEF_VEC_O(ipa_ref_t);
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64 DEF_VEC_ALLOC_O(ipa_ref_t,gc);
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65 DEF_VEC_P(ipa_ref_ptr);
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66 DEF_VEC_ALLOC_P(ipa_ref_ptr,heap);
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67
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68 /* List of references. This is stored in both callgraph and varpool nodes. */
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69 struct GTY(()) ipa_ref_list
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70 {
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71 /* Store actual references in references vector. */
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72 VEC(ipa_ref_t,gc) *references;
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73 /* Refering is vector of pointers to references. It must not live in GGC space
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74 or GGC will try to mark middle of references vectors. */
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75 VEC(ipa_ref_ptr,heap) * GTY((skip)) refering;
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76 };
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77
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78 struct ipa_ref * ipa_record_reference (struct cgraph_node *,
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79 struct varpool_node *,
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80 struct cgraph_node *,
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81 struct varpool_node *,
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82 enum ipa_ref_use, gimple);
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83
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84 void ipa_remove_reference (struct ipa_ref *);
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85 void ipa_remove_all_references (struct ipa_ref_list *);
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86 void ipa_remove_all_refering (struct ipa_ref_list *);
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87 void ipa_dump_references (FILE *, struct ipa_ref_list *);
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88 void ipa_dump_refering (FILE *, struct ipa_ref_list *);
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89 void ipa_clone_references (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
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90 void ipa_clone_refering (struct cgraph_node *, struct varpool_node *, struct ipa_ref_list *);
67
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91 bool ipa_ref_cannot_lead_to_return (struct ipa_ref *);
63
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92