/* 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
- Free Software Foundation, Inc.
- Originally contributed by Michael P. Hayes
+ Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008,
+ 2009, 2010 Free Software Foundation, Inc.
+ Originally contributed by Michael P. Hayes
(m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com)
Major rewrite contributed by Danny Berlin (dberlin@dberlin.org)
and Kenneth Zadeck (zadeck@naturalbridge.com).
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
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
+<http://www.gnu.org/licenses/>. */
#ifndef GCC_DF_H
#define GCC_DF_H
#include "bitmap.h"
+#include "regset.h"
+#include "sbitmap.h"
#include "basic-block.h"
#include "alloc-pool.h"
+#include "timevar.h"
struct dataflow;
-struct df;
+struct df_d;
struct df_problem;
+struct df_link;
+struct df_insn_info;
+union df_ref_d;
+
+/* 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. */
-#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. */
-
+ 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_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_WORD_LR 5 /* Subreg tracking lr. */
+#define DF_NOTE 6 /* REG_DEF and REG_UNUSED notes. */
+#define DF_MD 7 /* Multiple Definitions. */
+
+#define DF_LAST_PROBLEM_PLUS1 (DF_MD + 1)
/* Dataflow direction. */
enum df_flow_dir
DF_BACKWARD
};
+/* Descriminator for the various df_ref types. */
+enum df_ref_class {DF_REF_BASE, DF_REF_ARTIFICIAL, DF_REF_REGULAR};
+
+/* The first of these us a set of a registers. 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};
+
+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,
+
+
+ /* If the ref has one of the following two flags set, then the
+ struct df_ref can be cast to struct df_ref_extract to access
+ the width and offset fields. */
+
+ /* This flag is set if the ref contains a SIGN_EXTRACT. */
+ DF_REF_SIGN_EXTRACT = 1 << 8,
+
+ /* This flag is set if the ref contains a ZERO_EXTRACT. */
+ DF_REF_ZERO_EXTRACT = 1 << 9,
+
+ /* This flag is set if the ref contains a STRICT_LOW_PART. */
+ DF_REF_STRICT_LOW_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,
+
+ /* This flag is set if this ref is inside a pre/post modify. */
+ DF_REF_PRE_POST_MODIFY = 1 << 15
+
+ };
+
+/* 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
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) (struct dataflow *, bitmap);
+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);
+/* Confluence operator for blocks with 1 or more out (or in) edges.
+ Return true if BB input data has changed. */
+typedef bool (*df_confluence_function_n) (edge);
-/* Transfer function for blocks. */
-typedef bool (*df_transfer_function) (struct dataflow *, int);
+/* Transfer function for blocks.
+ Return true if BB output data has changed. */
+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 dump results to FILE. */
-typedef void (*df_dump_problem_function) (struct dataflow *, FILE *);
+/* 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 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. */
struct df_problem {
/* The unique id of the problem. This is used it index into
df->defined_problems to make accessing the problem data easy. */
- unsigned int id;
+ unsigned int id;
enum df_flow_dir dir; /* Dataflow direction. */
df_alloc_function alloc_fun;
df_reset_function reset_fun;
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;
+ unsigned int block_info_elt_size;
+
+ /* The timevar id associated with this pass. */
+ timevar_id_t 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;
+ void *block_info;
unsigned int block_info_size;
/* The pool to allocate the block_info from. */
- alloc_pool block_pool;
+ 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. */
+ int flags : 16; /* Various df_ref_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
+
+/* 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_base_ref
{
- 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. */
+ /* These three bitfields are intentionally oversized, in the hope that
+ accesses to 8 and 16-bit fields will usually be quicker. */
+ ENUM_BITFIELD(df_ref_class) cl : 8;
+
+ ENUM_BITFIELD(df_ref_type) type : 8;
+ /* Type of ref. */
+ int flags : 16; /* Various df_ref_flags. */
+ unsigned int regno; /* The register number referenced. */
+ rtx reg; /* The register referenced. */
+ struct df_link *chain; /* Head of def-use, use-def. */
+ /* Pointer to the insn info of the containing instruction. FIXME!
+ Currently this is NULL for artificial refs but this will be used
+ when FUDs are added. */
+ struct df_insn_info *insn_info;
+ /* 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. */
+ union df_ref_d *next_reg; /* Next ref with same regno and type. */
+ union df_ref_d *prev_reg; /* Prev ref with same regno and type. */
+ /* 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;
};
-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"}
+/* The three types of df_refs. Note that the df_ref_extract is an
+ extension of the df_regular_ref, not the df_base_ref. */
+struct df_artificial_ref
+{
+ struct df_base_ref base;
-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,
+ /* Artificial refs do not have an insn, so to get the basic block,
+ it must be explicitly here. */
+ basic_block bb;
+};
- /* 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,
+struct df_regular_ref
+{
+ struct df_base_ref base;
+ /* The loc is the address in the insn of the reg. This is not
+ defined for special registers, such as clobbers and stack
+ pointers that are also associated with call insns and so those
+ just use the base. */
+ rtx *loc;
+};
- /* 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,
+/* Union of the different kinds of defs/uses placeholders. */
+union df_ref_d
+{
+ struct df_base_ref base;
+ struct df_regular_ref regular_ref;
+ struct df_artificial_ref artificial_ref;
+};
+typedef union df_ref_d *df_ref;
- /* 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,
+/* One of these structures is allocated for every insn. */
+struct df_insn_info
+{
+ rtx insn; /* The insn this info comes from. */
+ df_ref *defs; /* Head of insn-def chain. */
+ df_ref *uses; /* Head of insn-use chain. */
+ /* Head of insn-use chain for uses in REG_EQUAL/EQUIV notes. */
+ 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;
+};
- /* True if ref is dead (i.e. the next ref is a def or clobber or
- the end of the function.) This is only valid the RI problem
- has been set in this df instance. */
- DF_REF_DIES_AFTER_THIS_USE = 64
- };
+/* These links are used for ref-ref chains. Currently only DEF-USE and
+ USE-DEF chains can be built by DF. */
+struct df_link
+{
+ df_ref ref;
+ struct df_link *next;
+};
+\f
+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. */
+};
-/* 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
+enum df_changeable_flags
{
- rtx reg; /* The register referenced. */
- unsigned int regno; /* The register number referenced. */
- basic_block bb; /* Basic block containing the instruction. */
+ /* 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. */
- /* 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. */
- 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_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. */
-};
+ 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. */
-/* There are two kinds of links: */
+ /* 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,
-/* This is used for def-use or use-def chains. */
-struct df_link
-{
- struct df_ref *ref;
- struct df_link *next;
+ /* 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 allocated, one for the uses and one for
- the defs. */
+/* 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. */
+ 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;
};
-\f
+/* 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. */
+ 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
used by owners of the problem.
----------------------------------------------------------------------------*/
-struct df
+struct df_d
{
-#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
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];
- int num_problems_defined;
+ struct dataflow *problems_in_order[DF_LAST_PROBLEM_PLUS1];
+ struct dataflow *problems_by_index[DF_LAST_PROBLEM_PLUS1];
- /* 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;
/* The following information is really the problem data for the
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. */
- bitmap entry_block_defs; /* The set of hardware registers live on entry to the function. */
- bitmap exit_block_uses; /* The set of hardware registers used in exit block. */
-};
-
-#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))
-/* 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)
+ int num_problems_defined;
+ bitmap_head 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_head 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_head 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. */
-/* 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)
+ /* Insns to delete, rescan or reprocess the notes at next
+ df_rescan_all or df_process_deferred_rescans. */
+ bitmap_head insns_to_delete;
+ bitmap_head insns_to_rescan;
+ bitmap_head 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. This is a combination of
+ enum df_changeable_flags values. */
+ int changeable_flags : 8;
+
+ /* 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;
+};
-/* 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)
+#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))
+#define DF_WORD_LR_BB_INFO(BB) (df_word_lr_get_bb_info((BB)->index))
+#define DF_MD_BB_INFO(BB) (df_md_get_bb_info((BB)->index))
+/* Most transformations that wish to use live register analysis will
+ 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)
+
+/* These macros are used by passes that are not tolerant of
+ uninitialized variables. This intolerance should eventually
+ be fixed. */
+#define DF_WORD_LR_IN(BB) (&DF_WORD_LR_BB_INFO(BB)->in)
+#define DF_WORD_LR_OUT(BB) (&DF_WORD_LR_BB_INFO(BB)->out)
/* Macros to access the elements within the ref structure. */
-#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_REG(REF) ((REF)->reg)
-#define DF_REF_LOC(REF) ((REF)->loc)
-#define DF_REF_BB(REF) ((REF)->bb)
+#define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->base.reg) == SUBREG \
+ ? SUBREG_REG ((REF)->base.reg) : ((REF)->base.reg))
+#define DF_REF_REGNO(REF) ((REF)->base.regno)
+#define DF_REF_REAL_LOC(REF) (GET_CODE (*((REF)->regular_ref.loc)) == SUBREG \
+ ? &SUBREG_REG (*((REF)->regular_ref.loc)) : ((REF)->regular_ref.loc))
+#define DF_REF_REG(REF) ((REF)->base.reg)
+#define DF_REF_LOC(REF) (DF_REF_CLASS(REF) == DF_REF_REGULAR ? \
+ (REF)->regular_ref.loc : NULL)
+#define DF_REF_BB(REF) (DF_REF_IS_ARTIFICIAL(REF) ? \
+ (REF)->artificial_ref.bb : BLOCK_FOR_INSN (DF_REF_INSN(REF)))
#define DF_REF_BBNO(REF) (DF_REF_BB (REF)->index)
-#define DF_REF_INSN(REF) ((REF)->insn)
-#define DF_REF_INSN_UID(REF) (INSN_UID ((REF)->insn))
-#define DF_REF_TYPE(REF) ((REF)->type)
-#define DF_REF_CHAIN(REF) ((REF)->chain)
-#define DF_REF_ID(REF) ((REF)->id)
-#define DF_REF_FLAGS(REF) ((REF)->flags)
-#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)
+#define DF_REF_INSN_INFO(REF) ((REF)->base.insn_info)
+#define DF_REF_INSN(REF) ((REF)->base.insn_info->insn)
+#define DF_REF_INSN_UID(REF) (INSN_UID (DF_REF_INSN(REF)))
+#define DF_REF_CLASS(REF) ((REF)->base.cl)
+#define DF_REF_TYPE(REF) ((REF)->base.type)
+#define DF_REF_CHAIN(REF) ((REF)->base.chain)
+#define DF_REF_ID(REF) ((REF)->base.id)
+#define DF_REF_FLAGS(REF) ((REF)->base.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)->base.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. */
+#define DF_REF_IS_ARTIFICIAL(REF) (DF_REF_CLASS(REF) == DF_REF_ARTIFICIAL)
+#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)->base.next_reg)
+#define DF_REF_PREV_REG(REF) ((REF)->base.prev_reg)
+/* The following two macros may only be applied if one of
+ DF_REF_SIGN_EXTRACT | DF_REF_ZERO_EXTRACT is true. */
+#define DF_REF_EXTRACT_WIDTH(REF) ((REF)->extract_ref.width)
+#define DF_REF_EXTRACT_OFFSET(REF) ((REF)->extract_ref.offset)
+#define DF_REF_EXTRACT_MODE(REF) ((REF)->extract_ref.mode)
/* 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))
+#define DF_MWS_REG_DEF_P(MREF) (DF_MWS_TYPE (MREF) == DF_REF_REG_DEF)
+#define DF_MWS_REG_USE_P(MREF) ((MREF) && !DF_MWS_REG_DEF_P (MREF))
+#define DF_MWS_TYPE(MREF) ((MREF)->type)
+
+/* 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_inited)
-#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_SIZE() ((df)->insns_size)
+#define DF_INSN_INFO_GET(INSN) (df->insns[(INSN_UID(INSN))])
+#define DF_INSN_INFO_SET(INSN,VAL) (df->insns[(INSN_UID (INSN))]=(VAL))
+#define DF_INSN_INFO_LUID(II) ((II)->luid)
+#define DF_INSN_INFO_DEFS(II) ((II)->defs)
+#define DF_INSN_INFO_USES(II) ((II)->uses)
+#define DF_INSN_INFO_EQ_USES(II) ((II)->eq_uses)
+
+#define DF_INSN_LUID(INSN) (DF_INSN_INFO_LUID (DF_INSN_INFO_GET(INSN)))
+#define DF_INSN_DEFS(INSN) (DF_INSN_INFO_DEFS (DF_INSN_INFO_GET(INSN)))
+#define DF_INSN_USES(INSN) (DF_INSN_INFO_USES (DF_INSN_INFO_GET(INSN)))
+#define DF_INSN_EQ_USES(INSN) (DF_INSN_INFO_EQ_USES (DF_INSN_INFO_GET(INSN)))
+
+#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;
-#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)
-/* This is a bitmap copy of regs_invalidated_by_call so that we can
- easily add it into bitmaps, etc. */
+/* One of these structures is allocated for every basic block. */
+struct df_scan_bb_info
+{
+ /* The entry block has many artificial defs and these are at the
+ bottom of the block.
-extern bitmap df_invalidated_by_call;
+ Blocks that are targets of exception edges may have some
+ artificial defs. These are logically located at the top of the
+ block.
-/* Initialize ur_in and ur_out as if all hard registers were partially
-available. */
+ Blocks that are the targets of non-local goto's have the hard
+ frame pointer defined at the top of the block. */
+ df_ref *artificial_defs;
-/* 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. */
+ /* Blocks that are targets of exception edges may have some
+ artificial uses. These are logically at the top of the block.
-#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. */
+ Most blocks have artificial uses at the bottom of the block. */
+ df_ref *artificial_uses;
+};
-/* One of these structures is allocated for every basic block. */
-struct df_scan_bb_info
+/* 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
{
- /* Defs at the start of a basic block that is the target of an
- exception edge. */
- struct df_ref *artificial_defs;
-
- /* Uses of hard registers that are live at every block. */
- struct df_ref *artificial_uses;
+ /* Local sets to describe the basic blocks. */
+ bitmap_head kill;
+ bitmap_head sparse_kill;
+ bitmap_head gen; /* The set of defs generated in this block. */
+
+ /* The results of the dataflow problem. */
+ bitmap_head in; /* At the top of the block. */
+ bitmap_head out; /* At the bottom of the block. */
};
-/* Reaching uses. */
-struct df_ru_bb_info
+/* Multiple reaching definitions. All bitmaps are referenced by the
+ register number. */
+
+struct df_md_bb_info
{
- bitmap kill;
- bitmap sparse_kill;
- bitmap gen;
- bitmap in;
- bitmap out;
+ /* Local sets to describe the basic blocks. */
+ bitmap_head gen; /* Partial/conditional definitions live at BB out. */
+ bitmap_head kill; /* Other definitions that are live at BB out. */
+ bitmap_head init; /* Definitions coming from dominance frontier edges. */
+
+ /* The results of the dataflow problem. */
+ bitmap_head in; /* Just before the block itself. */
+ bitmap_head out; /* At the bottom of the block. */
};
-/* Reaching definitions. */
-struct df_rd_bb_info
+/* Live registers, a backwards dataflow problem. All bitmaps are
+ referenced by the register number. */
+
+struct df_lr_bb_info
{
- bitmap kill;
- bitmap sparse_kill;
- bitmap gen;
- bitmap in;
- bitmap out;
+ /* Local sets to describe the basic blocks. */
+ bitmap_head def; /* The set of registers set in this block
+ - except artificial defs at the top. */
+ bitmap_head use; /* The set of registers used in this block. */
+
+ /* The results of the dataflow problem. */
+ bitmap_head in; /* Just before the block itself. */
+ bitmap_head out; /* At the bottom of the block. */
};
-/* Live registers. */
-struct df_lr_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 def;
- bitmap use;
- bitmap in;
- bitmap out;
+ /* Local sets to describe the basic blocks. */
+ bitmap_head kill; /* The set of registers unset in this block. Calls,
+ for instance, unset registers. */
+ bitmap_head gen; /* The set of registers set in this block. */
+
+ /* The results of the dataflow problem. */
+ bitmap_head in; /* At the top of the block. */
+ bitmap_head out; /* At the bottom of the block. */
};
-/* Uninitialized registers. */
-struct df_ur_bb_info
-{
- bitmap kill;
- bitmap gen;
- bitmap in;
- bitmap out;
-};
+/* Live registers, a backwards dataflow problem. These bitmaps are
+ indexed by 2 * regno for each pseudo and have two entries for each
+ pseudo. Only pseudos that have a size of 2 * UNITS_PER_WORD are
+ meaningfully tracked. */
-/* Uninitialized registers. */
-struct df_urec_bb_info
+struct df_word_lr_bb_info
{
- bitmap earlyclobber;
- bitmap kill;
- bitmap gen;
- bitmap in;
- bitmap out;
+ /* Local sets to describe the basic blocks. */
+ bitmap_head def; /* The set of registers set in this block
+ - except artificial defs at the top. */
+ bitmap_head use; /* The set of registers used in this block. */
+
+ /* The results of the dataflow problem. */
+ bitmap_head in; /* Just before the block itself. */
+ bitmap_head out; /* At the bottom of the block. */
};
-#define df_finish(df) {df_finish1(df); df=NULL;}
+/* 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_d *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_word_lr (df->problems_by_index[DF_WORD_LR])
+#define df_note (df->problems_by_index[DF_NOTE])
+#define df_md (df->problems_by_index[DF_MD])
+
+/* 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
+
/* 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 int df_set_flags (int);
+extern int df_clear_flags (int);
+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 df_ref df_bb_regno_first_def_find (basic_block, unsigned int);
+extern df_ref df_bb_regno_last_def_find (basic_block, unsigned int);
+extern df_ref df_find_def (rtx, rtx);
+extern bool df_reg_defined (rtx, rtx);
+extern 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_print_word_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 (df_ref *, bool, FILE *);
+extern void df_regs_chain_dump (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 (df_ref, FILE *);
extern void debug_df_insn (rtx);
extern void debug_df_regno (unsigned int);
extern void debug_df_reg (rtx);
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_ref (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 (df_ref, df_ref);
+extern void df_chain_unlink (df_ref);
+extern void df_chain_copy (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_rd_simulate_artificial_defs_at_top (basic_block, bitmap);
+extern void df_rd_simulate_one_insn (basic_block, rtx, bitmap);
+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 (unsigned int);
+extern void df_word_lr_add_problem (void);
+extern bool df_word_lr_mark_ref (df_ref, bool, bitmap);
+extern bool df_word_lr_simulate_defs (rtx, bitmap);
+extern void df_word_lr_simulate_uses (rtx, bitmap);
+extern void df_word_lr_simulate_artificial_refs_at_top (basic_block, bitmap);
+extern void df_word_lr_simulate_artificial_refs_at_end (basic_block, bitmap);
+extern void df_note_add_problem (void);
+extern void df_md_add_problem (void);
+extern void df_md_simulate_artificial_defs_at_top (basic_block, bitmap);
+extern void df_md_simulate_one_insn (basic_block, rtx, bitmap);
+extern void df_simulate_find_noclobber_defs (rtx, bitmap);
+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_initialize_backwards (basic_block, bitmap);
+extern void df_simulate_one_insn_backwards (basic_block, rtx, bitmap);
+extern void df_simulate_finalize_backwards (basic_block, bitmap);
+extern void df_simulate_initialize_forwards (basic_block, bitmap);
+extern void df_simulate_one_insn_forwards (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 df_ref df_ref_create (rtx, rtx *, rtx,basic_block,
+ enum df_ref_type, int ref_flags);
+extern void df_ref_remove (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 bool df_insn_rescan_debug_internal (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, basic_block);
+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_md_bb_info *
+df_md_get_bb_info (unsigned int index)
+{
+ if (index < df_md->block_info_size)
+ return &((struct df_md_bb_info *) df_md->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;
+}
+
+static inline struct df_word_lr_bb_info *
+df_word_lr_get_bb_info (unsigned int index)
+{
+ if (index < df_word_lr->block_info_size)
+ return &((struct df_word_lr_bb_info *) df_word_lr->block_info)[index];
+ else
+ return NULL;
+}
+
+/* Get the artificial defs for a basic block. */
+
+static inline 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 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 (df_ref, struct web_entry *,
+ unsigned int *used, struct web_entry *,
+ bool (*fun) (struct web_entry *, struct web_entry *));
#endif /* GCC_DF_H */
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