diff options
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 11 |
1 files changed, 6 insertions, 5 deletions
@@ -456,8 +456,8 @@ extern void rtvec_check_failed_bounds PROTO((rtvec, int, flags computed by get_jump_flags() after dbr scheduling is complete. REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P, but are too complex for DWARF to interpret what they imply. The attached - rtx is used instead of intuition. */ -/* REG_EH_REGION is used to indicate what exception region an INSN + rtx is used instead of intuition. + REG_EH_REGION is used to indicate what exception region an INSN belongs in. This can be used to indicate what region a call may throw to. a REGION of 0 indicates that a call cannot throw at all. a REGION of -1 indicates that it cannot throw, nor will it execute @@ -465,8 +465,9 @@ extern void rtvec_check_failed_bounds PROTO((rtvec, int, REG_EH_RETHROW is used to indicate that a call is actually a call to rethrow, and specifies the rethrow symbol for the region the rethrow is targetting. This provides a way to generate the - non standard flow edges required for a rethrow. */ - + non standard flow edges required for a rethrow. + REG_SAVE_NOTE is used by haifa-sched to save NOTE_INSN notes + across scheduling. */ #define REG_NOTES(INSN) XEXP(INSN, 6) @@ -481,7 +482,7 @@ enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4, REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19, REG_BR_PRED = 20, REG_EH_CONTEXT = 21, REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23, - REG_EH_RETHROW = 24 }; + REG_EH_RETHROW = 24, REG_SAVE_NOTE = 25 }; /* The base value for branch probability notes. */ #define REG_BR_PROB_BASE 10000 |