X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fdf.h;h=8beadc98d4c88ac85910d0e77db11c2b9c985c58;hb=21e07d2ff13e66d584f51bfb1e879963544279c0;hp=a353d36ce11eac02d2d475d41e22d97d6ac238d0;hpb=d0802b3933a538b24bfdf5cb4b3ee44e4a1a660a;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/df.h b/gcc/df.h index a353d36ce11..8beadc98d4c 100644 --- a/gcc/df.h +++ b/gcc/df.h @@ -1,6 +1,6 @@ /* Form lists of pseudo register references for autoinc optimization for GNU compiler. This is part of flow optimization. - Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006 + Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. Originally contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com) @@ -11,7 +11,7 @@ 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 2, or (at your option) any later +Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY @@ -20,9 +20,8 @@ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ +along with GCC; see the file COPYING3. If not see +. */ #ifndef GCC_DF_H #define GCC_DF_H @@ -34,25 +33,23 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA struct dataflow; struct df; struct df_problem; +struct df_link; + +/* Data flow problems. All problems must have a unique id here. */ -/* Data flow problems. All problems must have a unique here. */ /* Scanning is not really a dataflow problem, but it is useful to have the basic block functions in the vector so that things get done in - a uniform manner. */ + a uniform manner. The last four problems can be added or deleted + at any time are always defined (though LIVE is always there at -O2 + or higher); the others are always there. */ #define DF_SCAN 0 -#define DF_RU 1 /* Reaching Uses. */ -#define DF_RD 2 /* Reaching Defs. */ -#define DF_LR 3 /* Live Registers. */ -#define DF_UR 4 /* Uninitialized Registers. */ -#define DF_UREC 5 /* Uninitialized Registers with Early Clobber. */ -#define DF_CHAIN 6 /* Def-Use and/or Use-Def Chains. */ -#define DF_RI 7 /* Register Info. */ -#define DF_LAST_PROBLEM_PLUS1 (DF_RI + 1) - -/* Flags that control the building of chains. */ -#define DF_DU_CHAIN 1 /* Build DU chains. */ -#define DF_UD_CHAIN 2 /* Build UD chains. */ +#define DF_LR 1 /* Live Registers backward. */ +#define DF_LIVE 2 /* Live Registers & Uninitialized Registers */ +#define DF_RD 3 /* Reaching Defs. */ +#define DF_CHAIN 4 /* Def-Use and/or Use-Def Chains. */ +#define DF_NOTE 5 /* REG_DEF and REG_UNUSED notes. */ +#define DF_LAST_PROBLEM_PLUS1 (DF_NOTE + 1) /* Dataflow direction. */ enum df_flow_dir @@ -62,42 +59,174 @@ enum df_flow_dir DF_BACKWARD }; + +/* The first of these is a set of a register. The remaining three are + all uses of a register (the mem_load and mem_store relate to how + the register as an addressing operand). */ +enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD, + DF_REF_REG_MEM_STORE}; + +#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"} + +enum df_ref_flags + { + /* This flag is set if this ref occurs inside of a conditional + execution instruction. */ + DF_REF_CONDITIONAL = 1 << 0, + + /* If this flag is set for an artificial use or def, that ref + logically happens at the top of the block. If it is not set + for an artificial use or def, that ref logically happens at the + bottom of the block. This is never set for regular refs. */ + DF_REF_AT_TOP = 1 << 1, + + /* This flag is set if the use is inside a REG_EQUAL or REG_EQUIV + note. */ + DF_REF_IN_NOTE = 1 << 2, + + /* This bit is true if this ref can make regs_ever_live true for + this regno. */ + DF_HARD_REG_LIVE = 1 << 3, + + + /* This flag is set if this ref is a partial use or def of the + associated register. */ + DF_REF_PARTIAL = 1 << 4, + + /* Read-modify-write refs generate both a use and a def and + these are marked with this flag to show that they are not + independent. */ + DF_REF_READ_WRITE = 1 << 5, + + /* This flag is set if this ref, generally a def, may clobber the + referenced register. This is generally only set for hard + registers that cross a call site. With better information + about calls, some of these could be changed in the future to + DF_REF_MUST_CLOBBER. */ + DF_REF_MAY_CLOBBER = 1 << 6, + + /* This flag is set if this ref, generally a def, is a real + clobber. This is not currently set for registers live across a + call because that clobbering may or may not happen. + + Most of the uses of this are with sets that have a + GET_CODE(..)==CLOBBER. Note that this is set even if the + clobber is to a subreg. So in order to tell if the clobber + wipes out the entire register, it is necessary to also check + the DF_REF_PARTIAL flag. */ + DF_REF_MUST_CLOBBER = 1 << 7, + + + /* This flag is set if this ref is inside a pre/post modify. */ + DF_REF_PRE_POST_MODIFY = 1 << 8, + + /* This flag is set if the ref contains a ZERO_EXTRACT or SIGN_EXTRACT. */ + DF_REF_EXTRACT = 1 << 9, + + /* This flag is set if the ref contains a STRICT_LOWER_PART. */ + DF_REF_STRICT_LOWER_PART = 1 << 10, + + /* This flag is set if the ref contains a SUBREG. */ + DF_REF_SUBREG = 1 << 11, + + + /* This bit is true if this ref is part of a multiword hardreg. */ + DF_REF_MW_HARDREG = 1 << 12, + + /* This flag is set if this ref is a usage of the stack pointer by + a function call. */ + DF_REF_CALL_STACK_USAGE = 1 << 13, + + /* This flag is used for verification of existing refs. */ + DF_REF_REG_MARKER = 1 << 14 + }; + +/* The possible ordering of refs within the df_ref_info. */ +enum df_ref_order + { + /* There is not table. */ + DF_REF_ORDER_NO_TABLE, + + /* There is a table of refs but it is not (or no longer) organized + by one of the following methods. */ + DF_REF_ORDER_UNORDERED, + DF_REF_ORDER_UNORDERED_WITH_NOTES, + + /* Organize the table by reg order, all of the refs with regno 0 + followed by all of the refs with regno 1 ... . Within all of + the regs for a particular regno, the refs are unordered. */ + DF_REF_ORDER_BY_REG, + + /* For uses, the refs within eq notes may be added for + DF_REF_ORDER_BY_REG. */ + DF_REF_ORDER_BY_REG_WITH_NOTES, + + /* Organize the refs in insn order. The insns are ordered within a + block, and the blocks are ordered by FOR_ALL_BB. */ + DF_REF_ORDER_BY_INSN, + + /* For uses, the refs within eq notes may be added for + DF_REF_ORDER_BY_INSN. */ + DF_REF_ORDER_BY_INSN_WITH_NOTES + }; + /* Function prototypes added to df_problem instance. */ /* Allocate the problem specific data. */ -typedef void (*df_alloc_function) (struct dataflow *, bitmap); +typedef void (*df_alloc_function) (bitmap); + +/* This function is called if the problem has global data that needs + to be cleared when ever the set of blocks changes. The bitmap + contains the set of blocks that may require special attention. + This call is only made if some of the blocks are going to change. + If everything is to be deleted, the wholesale deletion mechanisms + apply. */ +typedef void (*df_reset_function) (bitmap); /* Free the basic block info. Called from the block reordering code to get rid of the blocks that have been squished down. */ -typedef void (*df_free_bb_function) (struct dataflow *, basic_block, void *); +typedef void (*df_free_bb_function) (basic_block, void *); /* Local compute function. */ -typedef void (*df_local_compute_function) (struct dataflow *, bitmap, bitmap); +typedef void (*df_local_compute_function) (bitmap); /* Init the solution specific data. */ -typedef void (*df_init_function) (struct dataflow *, bitmap); +typedef void (*df_init_function) (bitmap); /* Iterative dataflow function. */ -typedef void (*df_dataflow_function) (struct dataflow *, bitmap, bitmap, - int *, int, bool); +typedef void (*df_dataflow_function) (struct dataflow *, bitmap, int *, int); /* Confluence operator for blocks with 0 out (or in) edges. */ -typedef void (*df_confluence_function_0) (struct dataflow *, basic_block); +typedef void (*df_confluence_function_0) (basic_block); /* Confluence operator for blocks with 1 or more out (or in) edges. */ -typedef void (*df_confluence_function_n) (struct dataflow *, edge); +typedef void (*df_confluence_function_n) (edge); /* Transfer function for blocks. */ -typedef bool (*df_transfer_function) (struct dataflow *, int); +typedef bool (*df_transfer_function) (int); /* Function to massage the information after the problem solving. */ -typedef void (*df_finalizer_function) (struct dataflow*, bitmap); +typedef void (*df_finalizer_function) (bitmap); /* Function to free all of the problem specific datastructures. */ -typedef void (*df_free_function) (struct dataflow *); +typedef void (*df_free_function) (void); + +/* Function to remove this problem from the stack of dataflow problems + without effecting the other problems in the stack except for those + that depend on this problem. */ +typedef void (*df_remove_problem_function) (void); + +/* Function to dump basic block independent results to FILE. */ +typedef void (*df_dump_problem_function) (FILE *); -/* Function to dump results to FILE. */ -typedef void (*df_dump_problem_function) (struct dataflow *, FILE *); +/* Function to dump top or bottom of basic block results to FILE. */ +typedef void (*df_dump_bb_problem_function) (basic_block, FILE *); + +/* Function to dump top or bottom of basic block results to FILE. */ +typedef void (*df_verify_solution_start) (void); + +/* Function to dump top or bottom of basic block results to FILE. */ +typedef void (*df_verify_solution_end) (void); /* The static description of a dataflow problem to solve. See above typedefs for doc for the function fields. */ @@ -108,6 +237,7 @@ struct df_problem { unsigned int id; enum df_flow_dir dir; /* Dataflow direction. */ df_alloc_function alloc_fun; + df_reset_function reset_fun; df_free_bb_function free_bb_fun; df_local_compute_function local_compute_fun; df_init_function init_fun; @@ -117,23 +247,28 @@ struct df_problem { df_transfer_function trans_fun; df_finalizer_function finalize_fun; df_free_function free_fun; - df_dump_problem_function dump_fun; - - /* A dataflow problem that must be solved before this problem can be - solved. */ + df_remove_problem_function remove_problem_fun; + df_dump_problem_function dump_start_fun; + df_dump_bb_problem_function dump_top_fun; + df_dump_bb_problem_function dump_bottom_fun; + df_verify_solution_start verify_start_fun; + df_verify_solution_end verify_end_fun; struct df_problem *dependent_problem; + + /* The timevar id associated with this pass. */ + unsigned int tv_id; + + /* True if the df_set_blocks should null out the basic block info if + this block drops out of df->blocks_to_analyze. */ + bool free_blocks_on_set_blocks; }; /* The specific instance of the problem to solve. */ struct dataflow { - struct df *df; /* Instance of df we are working in. */ struct df_problem *problem; /* The problem to be solved. */ - /* Communication between iterative_dataflow and hybrid_search. */ - sbitmap visited, pending, considered; - /* Array indexed by bb->index, that contains basic block problem and solution specific information. */ void **block_info; @@ -142,126 +277,183 @@ struct dataflow /* The pool to allocate the block_info from. */ alloc_pool block_pool; + /* The lr and live problems have their transfer functions recomputed + only if necessary. This is possible for them because, the + problems are kept active for the entire backend and their + transfer functions are indexed by the REGNO. These are not + defined for any other problem. */ + bitmap out_of_date_transfer_functions; + /* Other problem specific data that is not on a per basic block basis. The structure is generally defined privately for the problem. The exception being the scanning problem where it is fully public. */ - void *problem_data; + void *problem_data; + + /* Local flags for some of the problems. */ + unsigned int local_flags; + + /* True if this problem of this instance has been initialized. This + is used by the dumpers to keep garbage out of the dumps if, for + debugging a dump is produced before the first call to + df_analyze after a new problem is added. */ + bool computed; + + /* True if the something has changed which invalidates the dataflow + solutions. Note that this bit is always true for all problems except + lr and live. */ + bool solutions_dirty; + + /* If true, this pass is deleted by df_finish_pass. This is never + true for DF_SCAN and DF_LR. It is true for DF_LIVE if optimize > + 1. It is always true for the other problems. */ + bool optional_p; }; -/* One of these structures is allocated for every insn. */ -struct df_insn_info + +/* The set of multiword hardregs used as operands to this + instruction. These are factored into individual uses and defs but + the aggregate is still needed to service the REG_DEAD and + REG_UNUSED notes. */ +struct df_mw_hardreg { - struct df_ref *defs; /* Head of insn-def chain. */ - struct df_ref *uses; /* Head of insn-use chain. */ - /* ???? The following luid field should be considered private so that - we can change it on the fly to accommodate new insns? */ - int luid; /* Logical UID. */ - bool contains_asm; /* Contains an asm instruction. */ + rtx mw_reg; /* The multiword hardreg. */ + /* These two bitfields are intentionally oversized, in the hope that + accesses to 16-bit fields will usually be quicker. */ + ENUM_BITFIELD(df_ref_type) type : 16; + /* Used to see if the ref is read or write. */ + ENUM_BITFIELD(df_ref_flags) flags : 16; + /* Various flags. */ + unsigned int start_regno; /* First word of the multi word subreg. */ + unsigned int end_regno; /* Last word of the multi word subreg. */ + unsigned int mw_order; /* Same as df_ref.ref_order. */ }; + -/* Two of these structures are allocated for every pseudo reg, one for - the uses and one for the defs. */ -struct df_reg_info +/* One of these structures is allocated for every insn. */ +struct df_insn_info { - struct df_ref *reg_chain; /* Head of reg-use or def chain. */ - unsigned int begin; /* First def_index for this pseudo. */ - unsigned int n_refs; /* Number of refs or defs for this pseudo. */ + rtx insn; /* The insn this info comes from. */ + struct df_ref **defs; /* Head of insn-def chain. */ + struct df_ref **uses; /* Head of insn-use chain. */ + /* Head of insn-use chain for uses in REG_EQUAL/EQUIV notes. */ + struct df_ref **eq_uses; + struct df_mw_hardreg **mw_hardregs; + /* The logical uid of the insn in the basic block. This is valid + after any call to df_analyze but may rot after insns are added, + deleted or moved. */ + int luid; }; -enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD, - DF_REF_REG_MEM_STORE}; - -#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"} - -enum df_ref_flags - { - /* Read-modify-write refs generate both a use and a def and - these are marked with this flag to show that they are not - independent. */ - DF_REF_READ_WRITE = 1, - - /* This flag is set, if we stripped the subreg from the reference. - In this case we must make conservative guesses, at what the - outer mode was. */ - DF_REF_STRIPPED = 2, - - /* If this flag is set, this is not a real definition/use, but an - artificial one created to model always live registers, eh uses, etc. */ - DF_REF_ARTIFICIAL = 4, - - - /* If this flag is set for an artificial use or def, that ref - logically happens at the top of the block. If it is not set - for an artificial use or def, that ref logically happens at the - bottom of the block. This is never set for regular refs. */ - DF_REF_AT_TOP = 8, - - /* This flag is set if the use is inside a REG_EQUAL note. */ - DF_REF_IN_NOTE = 16, - - /* This flag is set if this ref is really a clobber, and not a def. */ - DF_REF_CLOBBER = 32 - }; - - /* Define a register reference structure. One of these is allocated for every register reference (use or def). Note some register references (e.g., post_inc, subreg) generate both a def and a use. */ struct df_ref { rtx reg; /* The register referenced. */ - unsigned int regno; /* The register number referenced. */ basic_block bb; /* Basic block containing the instruction. */ - rtx insn; /* Insn containing ref. NB: THIS MAY BE NULL. */ + + /* Insn containing ref. This will be null if this is an artificial + reference. */ + rtx insn; rtx *loc; /* The location of the reg. */ - struct df_link *chain; /* Head of def-use, use-def or bi chain. */ - unsigned int id; /* Location in table. */ - enum df_ref_type type; /* Type of ref. */ - enum df_ref_flags flags; /* Various flags. */ - - /* For each regno, there are two chains of refs, one for the uses - and one for the defs. These chains go thru the refs themselves - rather than using an external structure. */ + struct df_link *chain; /* Head of def-use, use-def. */ + /* Location in the ref table. This is only valid after a call to + df_maybe_reorganize_[use,def]_refs which is an expensive operation. */ + int id; + /* The index at which the operand was scanned in the insn. This is + used to totally order the refs in an insn. */ + unsigned int ref_order; + + unsigned int regno; /* The register number referenced. */ + /* These two bitfields are intentionally oversized, in the hope that + accesses to 16-bit fields will usually be quicker. */ + ENUM_BITFIELD(df_ref_type) type : 16; + /* Type of ref. */ + ENUM_BITFIELD(df_ref_flags) flags : 16; + /* Various flags. */ + + /* For each regno, there are three chains of refs, one for the uses, + the eq_uses and the defs. These chains go thru the refs + themselves rather than using an external structure. */ struct df_ref *next_reg; /* Next ref with same regno and type. */ struct df_ref *prev_reg; /* Prev ref with same regno and type. */ - - /* Each insn has two lists, one for the uses and one for the - defs. This is the next field in either of these chains. */ - struct df_ref *next_ref; - void *data; /* The data assigned to it by user. */ }; -/* There are two kinds of links: */ - -/* This is used for def-use or use-def chains. */ +/* These links are used for two purposes: + 1) def-use or use-def chains. + 2) Multiword hard registers that underly a single hardware register. */ struct df_link { struct df_ref *ref; struct df_link *next; }; -/* Two of these structures are allocated, one for the uses and one for - the defs. */ + +enum df_chain_flags +{ + /* Flags that control the building of chains. */ + DF_DU_CHAIN = 1, /* Build DU chains. */ + DF_UD_CHAIN = 2 /* Build UD chains. */ +}; + +enum df_changeable_flags +{ + /* Scanning flags. */ + /* Flag to control the running of dce as a side effect of building LR. */ + DF_LR_RUN_DCE = 1 << 0, /* Run DCE. */ + DF_NO_HARD_REGS = 1 << 1, /* Skip hard registers in RD and CHAIN Building. */ + + DF_EQ_NOTES = 1 << 2, /* Build chains with uses present in EQUIV/EQUAL notes. */ + DF_NO_REGS_EVER_LIVE = 1 << 3, /* Do not compute the regs_ever_live. */ + + /* Cause df_insn_rescan df_notes_rescan and df_insn_delete, to + return immediately. This is used by passes that know how to update + the scanning them selves. */ + DF_NO_INSN_RESCAN = 1 << 4, + + /* Cause df_insn_rescan df_notes_rescan and df_insn_delete, to + return after marking the insn for later processing. This allows all + rescans to be batched. */ + DF_DEFER_INSN_RESCAN = 1 << 5, + + DF_VERIFY_SCHEDULED = 1 << 6 +}; + +/* Two of these structures are inline in df, one for the uses and one + for the defs. This structure is only contains the refs within the + boundary of the df_set_blocks if that has been defined. */ struct df_ref_info { - struct df_reg_info **regs; /* Array indexed by pseudo regno. */ - unsigned int regs_size; /* Size of currently allocated regs table. */ - unsigned int regs_inited; /* Number of regs with reg_infos allocated. */ struct df_ref **refs; /* Ref table, indexed by id. */ + unsigned int *begin; /* First ref_index for this pseudo. */ + unsigned int *count; /* Count of refs for this pseudo. */ unsigned int refs_size; /* Size of currently allocated refs table. */ - unsigned int bitmap_size; /* Number of refs seen. */ - - /* True if refs table is organized so that every reference for a - pseudo is contigious. */ - bool refs_organized; - /* True if the next refs should be added immediately or false to - defer to later to reorganize the table. */ - bool add_refs_inline; + + /* Table_size is the number of elements in the refs table. This + will also be the width of the bitvectors in the rd and ru + problems. Total_size is the number of refs. These will be the + same if the focus has not been reduced by df_set_blocks. If the + focus has been reduced, table_size will be smaller since it only + contains the refs in the set blocks. */ + unsigned int table_size; + unsigned int total_size; + + enum df_ref_order ref_order; }; - +/* Three of these structures are allocated for every pseudo reg. One + for the uses, one for the eq_uses and one for the defs. */ +struct df_reg_info +{ + /* Head of chain for refs of that type and regno. */ + struct df_ref *reg_chain; + /* Number of refs in the chain. */ + unsigned int n_refs; +}; + + /*---------------------------------------------------------------------------- Problem data for the scanning dataflow problem. Unlike the other dataflow problems, the problem data for scanning is fully exposed and @@ -271,12 +463,6 @@ struct df_ref_info struct df { -#define DF_HARD_REGS 1 /* Mark hard registers. */ -#define DF_EQUIV_NOTES 2 /* Mark uses present in EQUIV/EQUAL notes. */ -#define DF_SUBREGS 4 /* Return subregs rather than the inner reg. */ - - int flags; /* Indicates what's recorded. */ - /* The set of problems to be solved is stored in two arrays. In PROBLEMS_IN_ORDER, the problems are stored in the order that they are solved. This is an internally dense array that may have @@ -285,55 +471,100 @@ struct df the problem local data without having to search the first array. */ - struct dataflow *problems_in_order [DF_LAST_PROBLEM_PLUS1]; - struct dataflow *problems_by_index [DF_LAST_PROBLEM_PLUS1]; + struct dataflow *problems_in_order[DF_LAST_PROBLEM_PLUS1]; + struct dataflow *problems_by_index[DF_LAST_PROBLEM_PLUS1]; int num_problems_defined; - /* Set after calls to df_scan_blocks, this contains all of the - blocks that higher level problems must rescan before solving the - dataflow equations. If this is NULL, the blocks_to_analyze is - used. */ - bitmap blocks_to_scan; - - /* If not NULL, the subset of blocks of the program to be considered - for analysis. */ + /* If not NULL, this subset of blocks of the program to be + considered for analysis. At certain times, this will contain all + the blocks in the function so it cannot be used as an indicator + of if we are analyzing a subset. See analyze_subset. */ bitmap blocks_to_analyze; + /* If this is true, then only a subset of the blocks of the program + is considered to compute the solutions of dataflow problems. */ + bool analyze_subset; + + /* True if someone added or deleted something from regs_ever_live so + that the entry and exit blocks need be reprocessed. */ + bool redo_entry_and_exit; + /* The following information is really the problem data for the scanning instance but it is used too often by the other problems to keep getting it from there. */ struct df_ref_info def_info; /* Def info. */ struct df_ref_info use_info; /* Use info. */ + + /* The following three arrays are allocated in parallel. They contain + the sets of refs of each type for each reg. */ + struct df_reg_info **def_regs; /* Def reg info. */ + struct df_reg_info **use_regs; /* Eq_use reg info. */ + struct df_reg_info **eq_use_regs; /* Eq_use info. */ + unsigned int regs_size; /* Size of currently allocated regs table. */ + unsigned int regs_inited; /* Number of regs with reg_infos allocated. */ + + struct df_insn_info **insns; /* Insn table, indexed by insn UID. */ unsigned int insns_size; /* Size of insn table. */ bitmap hardware_regs_used; /* The set of hardware registers used. */ + /* The set of hard regs that are in the artificial uses at the end + of a regular basic block. */ + bitmap regular_block_artificial_uses; + /* The set of hard regs that are in the artificial uses at the end + of a basic block that has an EH pred. */ + bitmap eh_block_artificial_uses; + /* The set of hardware registers live on entry to the function. */ + bitmap entry_block_defs; bitmap exit_block_uses; /* The set of hardware registers used in exit block. */ + + /* Insns to delete, rescan or reprocess the notes at next + df_rescan_all or df_process_deferred_rescans. */ + bitmap insns_to_delete; + bitmap insns_to_rescan; + bitmap insns_to_notes_rescan; + int *postorder; /* The current set of basic blocks + in reverse postorder. */ + int *postorder_inverted; /* The current set of basic blocks + in reverse postorder of inverted CFG. */ + int n_blocks; /* The number of blocks in reverse postorder. */ + int n_blocks_inverted; /* The number of blocks + in reverse postorder of inverted CFG. */ + + /* An array [FIRST_PSEUDO_REGISTER], indexed by regno, of the number + of refs that qualify as being real hard regs uses. Artificial + uses and defs as well as refs in eq notes are ignored. If the + ref is a def, it cannot be a MAY_CLOBBER def. If the ref is a + use, it cannot be the emim_reg_set or be the frame or arg pointer + register. + + IT IS NOT ACCEPTABLE TO MANUALLY CHANGE THIS ARRAY. This array + always reflects the actual number of refs in the insn stream that + satisfy the above criteria. */ + unsigned int *hard_regs_live_count; + + /* This counter provides a way to totally order refs without using + addresses. It is incremented whenever a ref is created. */ + unsigned int ref_order; + + /* Problem specific control information. */ + enum df_changeable_flags changeable_flags; }; -#define DF_SCAN_BB_INFO(DF, BB) (df_scan_get_bb_info((DF)->problems_by_index[DF_SCAN],(BB)->index)) -#define DF_RU_BB_INFO(DF, BB) (df_ru_get_bb_info((DF)->problems_by_index[DF_RU],(BB)->index)) -#define DF_RD_BB_INFO(DF, BB) (df_rd_get_bb_info((DF)->problems_by_index[DF_RD],(BB)->index)) -#define DF_LR_BB_INFO(DF, BB) (df_lr_get_bb_info((DF)->problems_by_index[DF_LR],(BB)->index)) -#define DF_UR_BB_INFO(DF, BB) (df_ur_get_bb_info((DF)->problems_by_index[DF_UR],(BB)->index)) -#define DF_UREC_BB_INFO(DF, BB) (df_urec_get_bb_info((DF)->problems_by_index[DF_UREC],(BB)->index)) +#define DF_SCAN_BB_INFO(BB) (df_scan_get_bb_info((BB)->index)) +#define DF_RD_BB_INFO(BB) (df_rd_get_bb_info((BB)->index)) +#define DF_LR_BB_INFO(BB) (df_lr_get_bb_info((BB)->index)) +#define DF_LIVE_BB_INFO(BB) (df_live_get_bb_info((BB)->index)) /* Most transformations that wish to use live register analysis will - use these macros. The DF_UPWARD_LIVE* macros are only half of the - solution. */ -#define DF_LIVE_IN(DF, BB) (DF_UR_BB_INFO(DF, BB)->in) -#define DF_LIVE_OUT(DF, BB) (DF_UR_BB_INFO(DF, BB)->out) - - -/* Live in for register allocation also takes into account several other factors. */ -#define DF_RA_LIVE_IN(DF, BB) (DF_UREC_BB_INFO(DF, BB)->in) -#define DF_RA_LIVE_OUT(DF, BB) (DF_UREC_BB_INFO(DF, BB)->out) - -/* These macros are currently used by only reg-stack since it is not - tolerant of uninitialized variables. This intolerance should be - fixed because it causes other problems. */ -#define DF_UPWARD_LIVE_IN(DF, BB) (DF_LR_BB_INFO(DF, BB)->in) -#define DF_UPWARD_LIVE_OUT(DF, BB) (DF_LR_BB_INFO(DF, BB)->out) + use these macros. This info is the and of the lr and live sets. */ +#define DF_LIVE_IN(BB) (DF_LIVE_BB_INFO(BB)->in) +#define DF_LIVE_OUT(BB) (DF_LIVE_BB_INFO(BB)->out) +/* These macros are used by passes that are not tolerant of + uninitialized variables. This intolerance should eventually + be fixed. */ +#define DF_LR_IN(BB) (DF_LR_BB_INFO(BB)->in) +#define DF_LR_OUT(BB) (DF_LR_BB_INFO(BB)->out) /* Macros to access the elements within the ref structure. */ @@ -341,8 +572,8 @@ struct df #define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->reg) == SUBREG \ ? SUBREG_REG ((REF)->reg) : ((REF)->reg)) #define DF_REF_REGNO(REF) ((REF)->regno) -#define DF_REF_REAL_LOC(REF) (GET_CODE ((REF)->reg) == SUBREG \ - ? &SUBREG_REG ((REF)->reg) : ((REF)->loc)) +#define DF_REF_REAL_LOC(REF) (GET_CODE (*((REF)->loc)) == SUBREG \ + ? &SUBREG_REG (*((REF)->loc)) : ((REF)->loc)) #define DF_REF_REG(REF) ((REF)->reg) #define DF_REF_LOC(REF) ((REF)->loc) #define DF_REF_BB(REF) ((REF)->bb) @@ -353,173 +584,242 @@ struct df #define DF_REF_CHAIN(REF) ((REF)->chain) #define DF_REF_ID(REF) ((REF)->id) #define DF_REF_FLAGS(REF) ((REF)->flags) +#define DF_REF_FLAGS_IS_SET(REF, v) ((DF_REF_FLAGS (REF) & (v)) != 0) +#define DF_REF_FLAGS_SET(REF, v) (DF_REF_FLAGS (REF) |= (v)) +#define DF_REF_FLAGS_CLEAR(REF, v) (DF_REF_FLAGS (REF) &= ~(v)) +#define DF_REF_ORDER(REF) ((REF)->ref_order) +/* If DF_REF_IS_ARTIFICIAL () is true, this is not a real definition/use, + but an artificial one created to model + always live registers, eh uses, etc. + ARTIFICIAL refs has NULL insn. */ +#define DF_REF_IS_ARTIFICIAL(REF) ((REF)->insn == NULL) +#define DF_REF_REG_MARK(REF) (DF_REF_FLAGS_SET ((REF),DF_REF_REG_MARKER)) +#define DF_REF_REG_UNMARK(REF) (DF_REF_FLAGS_CLEAR ((REF),DF_REF_REG_MARKER)) +#define DF_REF_IS_REG_MARKED(REF) (DF_REF_FLAGS_IS_SET ((REF),DF_REF_REG_MARKER)) #define DF_REF_NEXT_REG(REF) ((REF)->next_reg) #define DF_REF_PREV_REG(REF) ((REF)->prev_reg) -#define DF_REF_NEXT_REF(REF) ((REF)->next_ref) -#define DF_REF_DATA(REF) ((REF)->data) /* Macros to determine the reference type. */ #define DF_REF_REG_DEF_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_DEF) -#define DF_REF_REG_USE_P(REF) ((REF) && ! DF_REF_REG_DEF_P (REF)) +#define DF_REF_REG_USE_P(REF) ((REF) && !DF_REF_REG_DEF_P (REF)) #define DF_REF_REG_MEM_STORE_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_STORE) #define DF_REF_REG_MEM_LOAD_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_LOAD) #define DF_REF_REG_MEM_P(REF) (DF_REF_REG_MEM_STORE_P (REF) \ || DF_REF_REG_MEM_LOAD_P (REF)) -/* Macros to get the refs out of def_info or use_info refs table. */ -#define DF_DEFS_SIZE(DF) ((DF)->def_info.bitmap_size) -#define DF_DEFS_GET(DF,ID) ((DF)->def_info.refs[(ID)]) -#define DF_DEFS_SET(DF,ID,VAL) ((DF)->def_info.refs[(ID)]=(VAL)) -#define DF_USES_SIZE(DF) ((DF)->use_info.bitmap_size) -#define DF_USES_GET(DF,ID) ((DF)->use_info.refs[(ID)]) -#define DF_USES_SET(DF,ID,VAL) ((DF)->use_info.refs[(ID)]=(VAL)) +/* Macros to get the refs out of def_info or use_info refs table. If + the focus of the dataflow has been set to some subset of blocks + with df_set_blocks, these macros will only find the uses and defs + in that subset of blocks. + + These macros should be used with care. The def macros are only + usable after a call to df_maybe_reorganize_def_refs and the use + macros are only usable after a call to + df_maybe_reorganize_use_refs. HOWEVER, BUILDING AND USING THESE + ARRAYS ARE A CACHE LOCALITY KILLER. */ + +#define DF_DEFS_TABLE_SIZE() (df->def_info.table_size) +#define DF_DEFS_GET(ID) (df->def_info.refs[(ID)]) +#define DF_DEFS_SET(ID,VAL) (df->def_info.refs[(ID)]=(VAL)) +#define DF_DEFS_COUNT(ID) (df->def_info.count[(ID)]) +#define DF_DEFS_BEGIN(ID) (df->def_info.begin[(ID)]) +#define DF_USES_TABLE_SIZE() (df->use_info.table_size) +#define DF_USES_GET(ID) (df->use_info.refs[(ID)]) +#define DF_USES_SET(ID,VAL) (df->use_info.refs[(ID)]=(VAL)) +#define DF_USES_COUNT(ID) (df->use_info.count[(ID)]) +#define DF_USES_BEGIN(ID) (df->use_info.begin[(ID)]) /* Macros to access the register information from scan dataflow record. */ -#define DF_REG_SIZE(DF) ((DF)->def_info.regs_size) -#define DF_REG_DEF_GET(DF, REG) ((DF)->def_info.regs[(REG)]) -#define DF_REG_DEF_SET(DF, REG, VAL) ((DF)->def_info.regs[(REG)]=(VAL)) -#define DF_REG_USE_GET(DF, REG) ((DF)->use_info.regs[(REG)]) -#define DF_REG_USE_SET(DF, REG, VAL) ((DF)->use_info.regs[(REG)]=(VAL)) +#define DF_REG_SIZE(DF) (df->regs_inited) +#define DF_REG_DEF_GET(REG) (df->def_regs[(REG)]) +#define DF_REG_DEF_CHAIN(REG) (df->def_regs[(REG)]->reg_chain) +#define DF_REG_DEF_COUNT(REG) (df->def_regs[(REG)]->n_refs) +#define DF_REG_USE_GET(REG) (df->use_regs[(REG)]) +#define DF_REG_USE_CHAIN(REG) (df->use_regs[(REG)]->reg_chain) +#define DF_REG_USE_COUNT(REG) (df->use_regs[(REG)]->n_refs) +#define DF_REG_EQ_USE_GET(REG) (df->eq_use_regs[(REG)]) +#define DF_REG_EQ_USE_CHAIN(REG) (df->eq_use_regs[(REG)]->reg_chain) +#define DF_REG_EQ_USE_COUNT(REG) (df->eq_use_regs[(REG)]->n_refs) /* Macros to access the elements within the reg_info structure table. */ -#define DF_REGNO_FIRST_DEF(DF, REGNUM) \ -(DF_REG_DEF_GET(DF, REGNUM) ? DF_REG_DEF_GET(DF, REGNUM) : 0) -#define DF_REGNO_LAST_USE(DF, REGNUM) \ -(DF_REG_USE_GET(DF, REGNUM) ? DF_REG_USE_GET(DF, REGNUM) : 0) +#define DF_REGNO_FIRST_DEF(REGNUM) \ +(DF_REG_DEF_GET(REGNUM) ? DF_REG_DEF_GET(REGNUM) : 0) +#define DF_REGNO_LAST_USE(REGNUM) \ +(DF_REG_USE_GET(REGNUM) ? DF_REG_USE_GET(REGNUM) : 0) /* Macros to access the elements within the insn_info structure table. */ -#define DF_INSN_SIZE(DF) ((DF)->insns_size) -#define DF_INSN_GET(DF,INSN) ((DF)->insns[(INSN_UID(INSN))]) -#define DF_INSN_SET(DF,INSN,VAL) ((DF)->insns[(INSN_UID (INSN))]=(VAL)) -#define DF_INSN_CONTAINS_ASM(DF, INSN) (DF_INSN_GET(DF,INSN)->contains_asm) -#define DF_INSN_LUID(DF, INSN) (DF_INSN_GET(DF,INSN)->luid) -#define DF_INSN_DEFS(DF, INSN) (DF_INSN_GET(DF,INSN)->defs) -#define DF_INSN_USES(DF, INSN) (DF_INSN_GET(DF,INSN)->uses) - -#define DF_INSN_UID_GET(DF,UID) ((DF)->insns[(UID)]) -#define DF_INSN_UID_LUID(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->luid) -#define DF_INSN_UID_DEFS(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->defs) -#define DF_INSN_UID_USES(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->uses) +#define DF_INSN_SIZE() ((df)->insns_size) +#define DF_INSN_GET(INSN) (df->insns[(INSN_UID(INSN))]) +#define DF_INSN_SET(INSN,VAL) (df->insns[(INSN_UID (INSN))]=(VAL)) +#define DF_INSN_LUID(INSN) (DF_INSN_GET(INSN)->luid) +#define DF_INSN_DEFS(INSN) (DF_INSN_GET(INSN)->defs) +#define DF_INSN_USES(INSN) (DF_INSN_GET(INSN)->uses) +#define DF_INSN_EQ_USES(INSN) (DF_INSN_GET(INSN)->eq_uses) + +#define DF_INSN_UID_GET(UID) (df->insns[(UID)]) +#define DF_INSN_UID_SET(UID,VAL) (df->insns[(UID)]=(VAL)) +#define DF_INSN_UID_SAFE_GET(UID) (((unsigned)(UID) < DF_INSN_SIZE()) \ + ? DF_INSN_UID_GET (UID) \ + : NULL) +#define DF_INSN_UID_LUID(INSN) (DF_INSN_UID_GET(INSN)->luid) +#define DF_INSN_UID_DEFS(INSN) (DF_INSN_UID_GET(INSN)->defs) +#define DF_INSN_UID_USES(INSN) (DF_INSN_UID_GET(INSN)->uses) +#define DF_INSN_UID_EQ_USES(INSN) (DF_INSN_UID_GET(INSN)->eq_uses) +#define DF_INSN_UID_MWS(INSN) (DF_INSN_UID_GET(INSN)->mw_hardregs) + +/* An obstack for bitmap not related to specific dataflow problems. + This obstack should e.g. be used for bitmaps with a short life time + such as temporary bitmaps. This obstack is declared in df-core.c. */ + +extern bitmap_obstack df_bitmap_obstack; /* This is a bitmap copy of regs_invalidated_by_call so that we can easily add it into bitmaps, etc. */ extern bitmap df_invalidated_by_call; -/* Initialize ur_in and ur_out as if all hard registers were partially -available. */ - -extern bitmap df_all_hard_regs; - -/* The way that registers are processed, especially hard registers, - changes as the compilation proceeds. These states are passed to - df_set_state to control this processing. */ - -#define DF_SCAN_INITIAL 1 /* Processing from beginning of rtl to - global-alloc. */ -#define DF_SCAN_GLOBAL 2 /* Processing before global - allocation. */ -#define DF_SCAN_POST_ALLOC 4 /* Processing after register - allocation. */ -extern int df_state; /* Indicates where we are in the compilation. */ - /* One of these structures is allocated for every basic block. */ struct df_scan_bb_info { - /* Defs at the start of a basic block that is the target of an - exception edge. */ - struct df_ref *artificial_defs; + /* The entry block has many artificial defs and these are at the + bottom of the block. - /* Uses of hard registers that are live at every block. */ - struct df_ref *artificial_uses; -}; + Blocks that are targets of exception edges may have some + artificial defs. These are logically located at the top of the + block. + Blocks that are the targets of non-local goto's have the hard + frame pointer defined at the top of the block. */ + struct df_ref **artificial_defs; -/* Reaching uses. */ -struct df_ru_bb_info -{ - bitmap kill; - bitmap sparse_kill; - bitmap gen; - bitmap in; - bitmap out; + /* Blocks that are targets of exception edges may have some + artificial uses. These are logically at the top of the block. + + Most blocks have artificial uses at the bottom of the block. */ + struct df_ref **artificial_uses; }; -/* Reaching definitions. */ +/* Reaching definitions. All bitmaps are indexed by the id field of + the ref except sparse_kill which is indexed by regno. */ struct df_rd_bb_info { - bitmap kill; + /* Local sets to describe the basic blocks. */ + bitmap kill; bitmap sparse_kill; - bitmap gen; - bitmap in; - bitmap out; + bitmap gen; /* The set of defs generated in this block. */ + + /* The results of the dataflow problem. */ + bitmap in; /* At the top of the block. */ + bitmap out; /* At the bottom of the block. */ }; -/* Live registers. */ +/* Live registers, a backwards dataflow problem. All bitmaps are + referenced by the register number. */ + struct df_lr_bb_info { - bitmap def; - bitmap use; - bitmap in; - bitmap out; + /* Local sets to describe the basic blocks. */ + bitmap def; /* The set of registers set in this block + - except artificial defs at the top. */ + bitmap use; /* The set of registers used in this block. */ + + /* The results of the dataflow problem. */ + bitmap in; /* Just before the block itself. */ + bitmap out; /* At the bottom of the block. */ }; -/* Uninitialized registers. */ -struct df_ur_bb_info +/* Uninitialized registers. All bitmaps are referenced by the + register number. Anded results of the forwards and backward live + info. Note that the forwards live information is not available + separately. */ +struct df_live_bb_info { - bitmap kill; - bitmap gen; - bitmap in; - bitmap out; + /* Local sets to describe the basic blocks. */ + bitmap kill; /* The set of registers unset in this block. Calls, + for instance, unset registers. */ + bitmap gen; /* The set of registers set in this block. */ + + /* The results of the dataflow problem. */ + bitmap in; /* At the top of the block. */ + bitmap out; /* At the bottom of the block. */ }; -/* Uninitialized registers. */ -struct df_urec_bb_info -{ - bitmap earlyclobber; - bitmap kill; - bitmap gen; - bitmap in; - bitmap out; -}; +/* This is used for debugging and for the dumpers to find the latest + instance so that the df info can be added to the dumps. This + should not be used by regular code. */ +extern struct df *df; +#define df_scan (df->problems_by_index[DF_SCAN]) +#define df_rd (df->problems_by_index[DF_RD]) +#define df_lr (df->problems_by_index[DF_LR]) +#define df_live (df->problems_by_index[DF_LIVE]) +#define df_chain (df->problems_by_index[DF_CHAIN]) +#define df_note (df->problems_by_index[DF_NOTE]) + +/* This symbol turns on checking that each modification of the cfg has + been identified to the appropriate df routines. It is not part of + verification per se because the check that the final solution has + not changed covers this. However, if the solution is not being + properly recomputed because the cfg is being modified, adding in + calls to df_check_cfg_clean can be used to find the source of that + kind of problem. */ +#if 0 +#define DF_DEBUG_CFG +#endif -#define df_finish(df) {df_finish1(df); df=NULL;} /* Functions defined in df-core.c. */ -extern struct df *df_init (int); -extern struct dataflow *df_add_problem (struct df *, struct df_problem *); -extern void df_set_blocks (struct df*, bitmap); -extern void df_finish1 (struct df *); -extern void df_analyze (struct df *); -extern void df_compact_blocks (struct df *); -extern void df_bb_replace (struct df *, int, basic_block); -extern struct df_ref *df_bb_regno_last_use_find (struct df *, basic_block, unsigned int); -extern struct df_ref *df_bb_regno_first_def_find (struct df *, basic_block, unsigned int); -extern struct df_ref *df_bb_regno_last_def_find (struct df *, basic_block, unsigned int); -extern bool df_insn_regno_def_p (struct df *, rtx, unsigned int); -extern struct df_ref *df_find_def (struct df *, rtx, rtx); -extern bool df_reg_defined (struct df *, rtx, rtx); -extern struct df_ref *df_find_use (struct df *, rtx, rtx); -extern bool df_reg_used (struct df *, rtx, rtx); -extern void df_iterative_dataflow (struct dataflow *, bitmap, bitmap, int *, int, bool); -extern void df_dump (struct df *, FILE *); -extern void df_chain_dump (struct df *, struct df_link *, FILE *); -extern void df_refs_chain_dump (struct df *, struct df_ref *, bool, FILE *); -extern void df_regs_chain_dump (struct df *, struct df_ref *, FILE *); -extern void df_insn_debug (struct df *, rtx, bool, FILE *); -extern void df_insn_debug_regno (struct df *, rtx, FILE *); -extern void df_regno_debug (struct df *, unsigned int, FILE *); -extern void df_ref_debug (struct df *, struct df_ref *, FILE *); +extern void df_add_problem (struct df_problem *); +extern enum df_changeable_flags df_set_flags (enum df_changeable_flags); +extern enum df_changeable_flags df_clear_flags (enum df_changeable_flags); +extern void df_set_blocks (bitmap); +extern void df_remove_problem (struct dataflow *); +extern void df_finish_pass (bool); +extern void df_analyze_problem (struct dataflow *, bitmap, int *, int); +extern void df_analyze (void); +extern int df_get_n_blocks (enum df_flow_dir); +extern int *df_get_postorder (enum df_flow_dir); +extern void df_simple_dataflow (enum df_flow_dir, df_init_function, + df_confluence_function_0, df_confluence_function_n, + df_transfer_function, bitmap, int *, int); +extern void df_mark_solutions_dirty (void); +extern bool df_get_bb_dirty (basic_block); +extern void df_set_bb_dirty (basic_block); +extern void df_compact_blocks (void); +extern void df_bb_replace (int, basic_block); +extern void df_bb_delete (int); +extern void df_verify (void); +#ifdef DF_DEBUG_CFG +extern void df_check_cfg_clean (void); +#endif +extern struct df_ref *df_bb_regno_first_def_find (basic_block, unsigned int); +extern struct df_ref *df_bb_regno_last_def_find (basic_block, unsigned int); +extern struct df_ref *df_find_def (rtx, rtx); +extern bool df_reg_defined (rtx, rtx); +extern struct df_ref *df_find_use (rtx, rtx); +extern bool df_reg_used (rtx, rtx); +extern void df_worklist_dataflow (struct dataflow *,bitmap, int *, int); +extern void df_print_regset (FILE *file, bitmap r); +extern void df_dump (FILE *); +extern void df_dump_region (FILE *); +extern void df_dump_start (FILE *); +extern void df_dump_top (basic_block, FILE *); +extern void df_dump_bottom (basic_block, FILE *); +extern void df_refs_chain_dump (struct df_ref **, bool, FILE *); +extern void df_regs_chain_dump (struct df_ref *, FILE *); +extern void df_insn_debug (rtx, bool, FILE *); +extern void df_insn_debug_regno (rtx, FILE *); +extern void df_regno_debug (unsigned int, FILE *); +extern void df_ref_debug (struct df_ref *, FILE *); extern void debug_df_insn (rtx); extern void debug_df_regno (unsigned int); extern void debug_df_reg (rtx); @@ -527,54 +827,140 @@ extern void debug_df_defno (unsigned int); extern void debug_df_useno (unsigned int); extern void debug_df_ref (struct df_ref *); extern void debug_df_chain (struct df_link *); -/* An instance of df that can be shared between passes. */ -extern struct df *shared_df; - /* Functions defined in df-problems.c. */ -extern struct dataflow *df_get_dependent_problem (struct dataflow *); -extern struct df_link *df_chain_create (struct dataflow *, struct df_ref *, struct df_ref *); -extern void df_chain_unlink (struct dataflow *, struct df_ref *, struct df_link *); -extern void df_chain_copy (struct dataflow *, struct df_ref *, struct df_link *); -extern bitmap df_get_live_in (struct df *, basic_block); -extern bitmap df_get_live_out (struct df *, basic_block); +extern struct df_link *df_chain_create (struct df_ref *, struct df_ref *); +extern void df_chain_unlink (struct df_ref *); +extern void df_chain_copy (struct df_ref *, struct df_link *); +extern bitmap df_get_live_in (basic_block); +extern bitmap df_get_live_out (basic_block); extern void df_grow_bb_info (struct dataflow *); -extern void df_chain_dump (struct df *, struct df_link *, FILE *); +extern void df_chain_dump (struct df_link *, FILE *); extern void df_print_bb_index (basic_block bb, FILE *file); -extern struct dataflow *df_ru_add_problem (struct df *); -extern struct df_ru_bb_info *df_ru_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_rd_add_problem (struct df *); -extern struct df_rd_bb_info *df_rd_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_lr_add_problem (struct df *); -extern struct df_lr_bb_info *df_lr_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_ur_add_problem (struct df *); -extern struct df_ur_bb_info *df_ur_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_urec_add_problem (struct df *); -extern struct df_urec_bb_info *df_urec_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_chain_add_problem (struct df *, int flags); -extern struct dataflow *df_ri_add_problem (struct df *); -extern int df_reg_lifetime (struct df *, rtx reg); - +extern void df_rd_add_problem (void); +extern void df_lr_add_problem (void); +extern void df_lr_verify_transfer_functions (void); +extern void df_live_verify_transfer_functions (void); +extern void df_live_add_problem (void); +extern void df_live_set_all_dirty (void); +extern void df_chain_add_problem (enum df_chain_flags); +extern void df_note_add_problem (void); +extern void df_simulate_find_defs (rtx, bitmap); +extern void df_simulate_defs (rtx, bitmap); +extern void df_simulate_uses (rtx, bitmap); +extern void df_simulate_artificial_refs_at_top (basic_block, bitmap); +extern void df_simulate_one_insn_forwards (basic_block, rtx, bitmap); +extern void df_simulate_artificial_refs_at_end (basic_block, bitmap); +extern void df_simulate_one_insn_backwards (basic_block, rtx, bitmap); /* Functions defined in df-scan.c. */ -extern struct df_scan_bb_info *df_scan_get_bb_info (struct dataflow *, unsigned int); -extern struct dataflow *df_scan_add_problem (struct df *); -extern void df_rescan_blocks (struct df *, bitmap); -extern struct df_ref *df_ref_create (struct df *, rtx, rtx *, rtx,basic_block,enum df_ref_type, enum df_ref_flags); -extern struct df_ref *df_get_artificial_defs (struct df *, unsigned int); -extern struct df_ref *df_get_artificial_uses (struct df *, unsigned int); -extern void df_reg_chain_create (struct df_reg_info *, struct df_ref *); -extern struct df_ref *df_reg_chain_unlink (struct dataflow *, struct df_ref *); -extern void df_ref_remove (struct df *, struct df_ref *); -extern void df_insn_refs_delete (struct dataflow *, rtx); -extern void df_bb_refs_delete (struct dataflow *, int); -extern void df_refs_delete (struct dataflow *, bitmap); -extern void df_reorganize_refs (struct df_ref_info *); -extern void df_set_state (int); +extern void df_scan_alloc (bitmap); +extern void df_scan_add_problem (void); +extern void df_grow_reg_info (void); +extern void df_grow_insn_info (void); +extern void df_scan_blocks (void); +extern struct df_ref *df_ref_create (rtx, rtx *, rtx,basic_block, + enum df_ref_type, enum df_ref_flags); +extern void df_ref_remove (struct df_ref *); +extern struct df_insn_info * df_insn_create_insn_record (rtx); +extern void df_insn_delete (basic_block, unsigned int); +extern void df_bb_refs_record (int, bool); +extern bool df_insn_rescan (rtx); +extern void df_insn_rescan_all (void); +extern void df_process_deferred_rescans (void); +extern void df_recompute_luids (basic_block); +extern void df_insn_change_bb (rtx); +extern void df_maybe_reorganize_use_refs (enum df_ref_order); +extern void df_maybe_reorganize_def_refs (enum df_ref_order); +extern void df_ref_change_reg_with_loc (int, int, rtx); +extern void df_notes_rescan (rtx); extern void df_hard_reg_init (void); +extern void df_update_entry_block_defs (void); +extern void df_update_exit_block_uses (void); +extern void df_update_entry_exit_and_calls (void); +extern bool df_hard_reg_used_p (unsigned int); +extern unsigned int df_hard_reg_used_count (unsigned int); +extern bool df_regs_ever_live_p (unsigned int); +extern void df_set_regs_ever_live (unsigned int, bool); +extern void df_compute_regs_ever_live (bool); extern bool df_read_modify_subreg_p (rtx); +extern void df_scan_verify (void); + + +/* Get basic block info. */ + +static inline struct df_scan_bb_info * +df_scan_get_bb_info (unsigned int index) +{ + if (index < df_scan->block_info_size) + return (struct df_scan_bb_info *) df_scan->block_info[index]; + else + return NULL; +} + +static inline struct df_rd_bb_info * +df_rd_get_bb_info (unsigned int index) +{ + if (index < df_rd->block_info_size) + return (struct df_rd_bb_info *) df_rd->block_info[index]; + else + return NULL; +} + +static inline struct df_lr_bb_info * +df_lr_get_bb_info (unsigned int index) +{ + if (index < df_lr->block_info_size) + return (struct df_lr_bb_info *) df_lr->block_info[index]; + else + return NULL; +} + +static inline struct df_live_bb_info * +df_live_get_bb_info (unsigned int index) +{ + if (index < df_live->block_info_size) + return (struct df_live_bb_info *) df_live->block_info[index]; + else + return NULL; +} + +/* Get the artificial defs for a basic block. */ + +static inline struct df_ref ** +df_get_artificial_defs (unsigned int bb_index) +{ + return df_scan_get_bb_info (bb_index)->artificial_defs; +} + + +/* Get the artificial uses for a basic block. */ + +static inline struct df_ref ** +df_get_artificial_uses (unsigned int bb_index) +{ + return df_scan_get_bb_info (bb_index)->artificial_uses; +} + + +/* web */ + +/* This entry is allocated for each reference in the insn stream. */ +struct web_entry +{ + /* Pointer to the parent in the union/find tree. */ + struct web_entry *pred; + /* Newly assigned register to the entry. Set only for roots. */ + rtx reg; + void* extra_info; +}; +extern struct web_entry *unionfind_root (struct web_entry *); +extern bool unionfind_union (struct web_entry *, struct web_entry *); +extern void union_defs (struct df_ref *, + struct web_entry *, struct web_entry *, + bool (*fun) (struct web_entry *, struct web_entry *)); #endif /* GCC_DF_H */