diff options
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/gcc/rtl.h b/gcc/rtl.h index d27b9a2d41c..0fd7e6775b9 100644 --- a/gcc/rtl.h +++ b/gcc/rtl.h @@ -62,6 +62,8 @@ extern const char * const rtx_format[NUM_RTX_CODE]; extern const char rtx_class[NUM_RTX_CODE]; #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) + +extern const unsigned char rtx_next[NUM_RTX_CODE]; /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label relative to which the offsets are calculated, as explained in rtl.def. */ @@ -103,7 +105,7 @@ typedef struct mem_attrs GTY(()) /* Common union for an element of an rtx. */ -typedef union rtunion_def +union rtunion_def { HOST_WIDE_INT rtwint; int rtint; @@ -118,11 +120,13 @@ typedef union rtunion_def tree rttree; struct basic_block_def *bb; mem_attrs *rtmem; -} rtunion; +}; +typedef union rtunion_def rtunion; /* RTL expression ("rtx"). */ -struct rtx_def +struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"), + chain_prev ("RTX_PREV (&%h)"))) { /* The kind of expression this is. */ ENUM_BITFIELD(rtx_code) code: 16; @@ -198,11 +202,29 @@ struct rtx_def /* The first element of the operands of this rtx. The number of operands and their types are controlled by the `code' field, according to rtl.def. */ - rtunion fld[1]; + rtunion GTY ((special ("rtx_def"), + desc ("GET_CODE (&%0)"))) fld[1]; }; #define NULL_RTX (rtx) 0 +/* The "next" and "previous" RTX, relative to this one. */ + +#define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \ + : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)])) + +/* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed. + */ +#define RTX_PREV(X) ((GET_CODE (X) == INSN \ + || GET_CODE (X) == CALL_INSN \ + || GET_CODE (X) == JUMP_INSN \ + || GET_CODE (X) == NOTE \ + || GET_CODE (X) == BARRIER \ + || GET_CODE (X) == CODE_LABEL) \ + && PREV_INSN (X) != NULL \ + && NEXT_INSN (PREV_INSN (X)) == X \ + ? PREV_INSN (X) : NULL) + /* Define macros to access the `code' field of the rtx. */ #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code) |