diff options
Diffstat (limited to 'gcc/sched-int.h')
| -rw-r--r-- | gcc/sched-int.h | 50 |
1 files changed, 41 insertions, 9 deletions
diff --git a/gcc/sched-int.h b/gcc/sched-int.h index 2e462380bb8..32bdeb42ab9 100644 --- a/gcc/sched-int.h +++ b/gcc/sched-int.h @@ -206,6 +206,18 @@ typedef int dw_t; extern enum reg_note ds_to_dk (ds_t); extern ds_t dk_to_ds (enum reg_note); +/* Describe a dependency that can be broken by making a replacement + in one of the patterns. LOC is the location, ORIG and NEWVAL the + two alternative contents, and INSN the instruction that must be + changed. */ +struct dep_replacement +{ + rtx *loc; + rtx orig; + rtx newval; + rtx insn; +}; + /* Information about the dependency. */ struct _dep { @@ -215,18 +227,30 @@ struct _dep /* Consumer. */ rtx con; - /* Dependency major type. This field is superseded by STATUS below. - Though, it is still in place because some targets use it. */ - enum reg_note type; + /* If nonnull, holds a pointer to information about how to break the + dependency by making a replacement in one of the insns. There is + only one such dependency for each insn that must be modified in + order to break such a dependency. */ + struct dep_replacement *replace; /* Dependency status. This field holds all dependency types and additional information for speculative dependencies. */ ds_t status; - /* Cached cost of the dependency. */ - int cost; + /* Dependency major type. This field is superseded by STATUS above. + Though, it is still in place because some targets use it. */ + ENUM_BITFIELD(reg_note) type:6; + + unsigned nonreg:1; + unsigned multiple:1; + + /* Cached cost of the dependency. Make sure to update UNKNOWN_DEP_COST + when changing the size of this field. */ + int cost:20; }; +#define UNKNOWN_DEP_COST (-1<<19) + typedef struct _dep dep_def; typedef dep_def *dep_t; @@ -235,8 +259,9 @@ typedef dep_def *dep_t; #define DEP_TYPE(D) ((D)->type) #define DEP_STATUS(D) ((D)->status) #define DEP_COST(D) ((D)->cost) - -#define UNKNOWN_DEP_COST INT_MIN +#define DEP_NONREG(D) ((D)->nonreg) +#define DEP_MULTIPLE(D) ((D)->multiple) +#define DEP_REPLACE(D) ((D)->replace) /* Functions to work with dep. */ @@ -1047,7 +1072,11 @@ enum SPEC_TYPES_OFFSETS { Therefore, it can appear only in TODO_SPEC field of an instruction. */ #define HARD_DEP (DEP_CONTROL << 1) -#define DEP_CANCELLED (HARD_DEP << 1) +/* Set in the TODO_SPEC field of an instruction for which new_ready + has decided not to schedule it speculatively. */ +#define DEP_POSTPONED (HARD_DEP << 1) + +#define DEP_CANCELLED (DEP_POSTPONED << 1) /* This represents the results of calling sched-deps.c functions, which modify dependencies. */ @@ -1074,7 +1103,8 @@ enum SCHED_FLAGS { DO_SPECULATION = USE_DEPS_LIST << 1, DO_BACKTRACKING = DO_SPECULATION << 1, DO_PREDICATION = DO_BACKTRACKING << 1, - SCHED_RGN = DO_PREDICATION << 1, + DONT_BREAK_DEPENDENCIES = DO_PREDICATION << 1, + SCHED_RGN = DONT_BREAK_DEPENDENCIES << 1, SCHED_EBB = SCHED_RGN << 1, /* Scheduler can possibly create new basic blocks. Used for assertions. */ NEW_BBS = SCHED_EBB << 1, @@ -1406,6 +1436,8 @@ extern void dump_region_dot_file (const char *, int); extern void haifa_sched_init (void); extern void haifa_sched_finish (void); +extern void find_modifiable_mems (rtx, rtx); + /* sched-deps.c interface to walk, add, search, update, resolve, delete and debug instruction dependencies. */ |