diff options
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 27 |
1 files changed, 24 insertions, 3 deletions
@@ -148,7 +148,9 @@ typedef struct rtx_def together with the preceding insn. Valid only within sched. 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and from the target of a branch. Valid from reorg until end of compilation; - cleared before used. */ + cleared before used. + 1 in an INSN if this insn is dead code. Valid only during + dead-code elimination phase; cleared before use. */ unsigned int in_struct : 1; /* 1 if this rtx is used. This is used for copying shared structure. See `unshare_all_rtl'. @@ -202,10 +204,26 @@ typedef struct rtvec_def{ #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) -/* 1 if X is a REG. */ - +/* Predicate yielding nonzero iff X is an rtl for a register. */ #define REG_P(X) (GET_CODE (X) == REG) +/* Predicate yielding nonzero iff X is a label insn. */ +#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL) + +/* Predicate yielding nonzero iff X is a jump insn. */ +#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN) + +/* Predicate yielding nonzero iff X is a note insn. */ +#define NOTE_P(X) (GET_CODE (X) == NOTE) + +/* Predicate yielding nonzero iff X is a barrier insn. */ +#define BARRIER_P(X) (GET_CODE (X) == BARRIER) + +/* Predicate yielding nonzero iff X is a data for a jump table. */ +#define JUMP_TABLE_DATA_P(INSN) \ + (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \ + GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC)) + /* 1 if X is a constant value that is an integer. */ #define CONSTANT_P(X) \ @@ -374,6 +392,9 @@ extern void rtvec_check_failed_bounds PARAMS ((rtvec, int, delay slots, i.e., it is an annulled branch. */ #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) +/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */ +#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct) + /* 1 if insn is in a delay slot and is from the target of the branch. If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be executed if the branch is taken. For annulled branches with this bit |