diff options
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 56 |
1 files changed, 52 insertions, 4 deletions
@@ -130,9 +130,10 @@ struct rtx_def /* 1 in a MEM if we should keep the alias set for this mem unchanged when we access a component. 1 in a CALL_INSN if it is a sibling call. - 1 in a SET that is for a return. */ + 1 in a SET that is for a return. + In a CODE_LABEL, part of the two-bit alternate entry field. */ unsigned int jump : 1; - /* This flag is currently unused. */ + /* In a CODE_LABEL, part of the two-bit alternate entry field. */ unsigned int call : 1; /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere. 1 in a SUBREG if it references an unsigned object whose mode has been @@ -876,8 +877,55 @@ extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS]; of LABEL_REFs that point at it, so unused labels can be deleted. */ #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL) -/* Associate a name with a CODE_LABEL. */ -#define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 8, CODE_LABEL) +/* Labels carry a two-bit field composed of the ->jump and ->call + bits. This field indicates whether the label is an alternate + entry point, and if so, what kind. */ +enum label_kind +{ + LABEL_NORMAL = 0, /* ordinary label */ + LABEL_STATIC_ENTRY, /* alternate entry point, not exported */ + LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */ + LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */ +}; + +#if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007) + +/* Retrieve the kind of LABEL. */ +#define LABEL_KIND(LABEL) __extension__ \ +({ rtx const _label = (LABEL); \ + if (GET_CODE (_label) != CODE_LABEL) \ + rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \ + __FUNCTION__); \ + (enum label_kind) ((_label->jump << 1) | _label->call); }) + +/* Set the kind of LABEL. */ +#define SET_LABEL_KIND(LABEL, KIND) do { \ + rtx _label = (LABEL); \ + unsigned int _kind = (KIND); \ + if (GET_CODE (_label) != CODE_LABEL) \ + rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \ + __FUNCTION__); \ + _label->jump = ((_kind >> 1) & 1); \ + _label->call = (_kind & 1); \ +} while (0) + +#else + +/* Retrieve the kind of LABEL. */ +#define LABEL_KIND(LABEL) \ + ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call)) + +/* Set the kind of LABEL. */ +#define SET_LABEL_KIND(LABEL, KIND) do { \ + rtx _label = (LABEL); \ + unsigned int _kind = (KIND); \ + _label->jump = ((_kind >> 1) & 1); \ + _label->call = (_kind & 1); \ +} while (0) + +#endif /* rtl flag checking */ + +#define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL) /* The original regno this ADDRESSOF was built for. */ #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF) |