diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/doc/tm.texi | 6 | ||||
| -rw-r--r-- | gcc/doc/tm.texi.in | 2 | ||||
| -rw-r--r-- | gcc/mode-switching.cc | 5 | ||||
| -rw-r--r-- | gcc/target.def | 7 |
4 files changed, 19 insertions, 1 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 759331a..1a825c5 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -10455,6 +10455,12 @@ If @code{TARGET_MODE_EXIT} is defined then @code{TARGET_MODE_ENTRY} must be defined. @end deftypefn +@deftypefn {Target Hook} int TARGET_MODE_EH_HANDLER (int @var{entity}) +If this hook is defined, it should return the mode that @var{entity} is +guaranteed to be in on entry to an exception handler, or the number of modes +if there is no such guarantee. +@end deftypefn + @deftypefn {Target Hook} int TARGET_MODE_PRIORITY (int @var{entity}, int @var{n}) This hook specifies the order in which modes for @var{entity} are processed. 0 is the highest priority, diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in index a7b7aa2..5360c1b 100644 --- a/gcc/doc/tm.texi.in +++ b/gcc/doc/tm.texi.in @@ -6979,6 +6979,8 @@ mode or ``no mode'', depending on context. @hook TARGET_MODE_EXIT +@hook TARGET_MODE_EH_HANDLER + @hook TARGET_MODE_PRIORITY @node Target Attributes diff --git a/gcc/mode-switching.cc b/gcc/mode-switching.cc index 1145350..b8a887d 100644 --- a/gcc/mode-switching.cc +++ b/gcc/mode-switching.cc @@ -597,7 +597,10 @@ optimize_mode_switching (void) gcc_assert (NOTE_INSN_BASIC_BLOCK_P (ins_pos)); if (ins_pos != BB_END (bb)) ins_pos = NEXT_INSN (ins_pos); - ptr = new_seginfo (no_mode, no_mode, ins_pos, live_now); + if (bb_has_eh_pred (bb) + && targetm.mode_switching.eh_handler) + last_mode = targetm.mode_switching.eh_handler (e); + ptr = new_seginfo (no_mode, last_mode, ins_pos, live_now); add_seginfo (&tail_ptr, ptr); bitmap_clear_bit (transp_all, bb->index); } diff --git a/gcc/target.def b/gcc/target.def index 3dae335..a70275b 100644 --- a/gcc/target.def +++ b/gcc/target.def @@ -7071,6 +7071,13 @@ must be defined.", int, (int entity), NULL) DEFHOOK +(eh_handler, + "If this hook is defined, it should return the mode that @var{entity} is\n\ +guaranteed to be in on entry to an exception handler, or the number of modes\n\ +if there is no such guarantee.", + int, (int entity), NULL) + +DEFHOOK (priority, "This hook specifies the order in which modes for @var{entity}\n\ are processed. 0 is the highest priority,\n\ |