diff options
Diffstat (limited to 'gcc/df.h')
| -rw-r--r-- | gcc/df.h | 42 |
1 files changed, 26 insertions, 16 deletions
@@ -1,6 +1,6 @@ /* Form lists of pseudo register references for autoinc optimization for GNU compiler. This is part of flow optimization. - Copyright (C) 1999-2016 Free Software Foundation, Inc. + Copyright (C) 1999-2017 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) @@ -43,17 +43,20 @@ union df_ref_d; 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_DEAD and REG_UNUSED notes. */ -#define DF_MD 7 /* Multiple Definitions. */ -#define DF_MIR 8 /* Must-initialized Registers. */ - -#define DF_LAST_PROBLEM_PLUS1 (DF_MIR + 1) +enum df_problem_id + { + DF_SCAN, + DF_LR, /* Live Registers backward. */ + DF_LIVE, /* Live Registers & Uninitialized Registers */ + DF_RD, /* Reaching Defs. */ + DF_CHAIN, /* Def-Use and/or Use-Def Chains. */ + DF_WORD_LR, /* Subreg tracking lr. */ + DF_NOTE, /* REG_DEAD and REG_UNUSED notes. */ + DF_MD, /* Multiple Definitions. */ + DF_MIR, /* Must-initialized Registers. */ + + DF_LAST_PROBLEM_PLUS1 + }; /* Dataflow direction. */ enum df_flow_dir @@ -251,7 +254,7 @@ typedef void (*df_verify_solution_end) (void); 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; + enum df_problem_id id; enum df_flow_dir dir; /* Dataflow direction. */ df_alloc_function alloc_fun; df_reset_function reset_fun; @@ -272,7 +275,7 @@ struct df_problem { df_dump_insn_problem_function dump_insn_bottom_fun; df_verify_solution_start verify_start_fun; df_verify_solution_end verify_end_fun; - struct df_problem *dependent_problem; + const struct df_problem *dependent_problem; unsigned int block_info_elt_size; /* The timevar id associated with this pass. */ @@ -287,7 +290,7 @@ struct df_problem { /* The specific instance of the problem to solve. */ struct dataflow { - struct df_problem *problem; /* The problem to be solved. */ + const struct df_problem *problem; /* The problem to be solved. */ /* Array indexed by bb->index, that contains basic block problem and solution specific information. */ @@ -447,6 +450,13 @@ enum df_chain_flags DF_UD_CHAIN = 2 /* Build UD chains. */ }; +enum df_scan_flags +{ + /* Flags for the SCAN problem. */ + DF_SCAN_EMPTY_ENTRY_EXIT = 1 /* Don't define any registers in the entry + block; don't use any in the exit block. */ +}; + enum df_changeable_flags { /* Scanning flags. */ @@ -945,7 +955,7 @@ extern struct df_d *df; /* Functions defined in df-core.c. */ -extern void df_add_problem (struct df_problem *); +extern void df_add_problem (const struct df_problem *); extern int df_set_flags (int); extern int df_clear_flags (int); extern void df_set_blocks (bitmap); |