diff options
Diffstat (limited to 'gcc/lcm.c')
| -rw-r--r-- | gcc/lcm.c | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/gcc/lcm.c b/gcc/lcm.c index 2c0d81e01c5..3432332a06a 100644 --- a/gcc/lcm.c +++ b/gcc/lcm.c @@ -1029,7 +1029,8 @@ optimize_mode_switching (FILE *file) { regset live_at_end = eg->src->global_live_at_end; - gcc_assert (!pre_exit); + if (pre_exit) + abort (); pre_exit = split_edge (eg); COPY_REG_SET (pre_exit->global_live_at_start, live_at_end); COPY_REG_SET (pre_exit->global_live_at_end, live_at_end); @@ -1207,22 +1208,21 @@ optimize_mode_switching (FILE *file) emited = true; if (JUMP_P (BB_END (src_bb))) emit_insn_before (mode_set, BB_END (src_bb)); + /* It doesn't make sense to switch to normal mode + after a CALL_INSN, so we're going to abort if we + find one. The cases in which a CALL_INSN may + have an abnormal edge are sibcalls and EH edges. + In the case of sibcalls, the dest basic-block is + the EXIT_BLOCK, that runs in normal mode; it is + assumed that a sibcall insn requires normal mode + itself, so no mode switch would be required after + the call (it wouldn't make sense, anyway). In + the case of EH edges, EH entry points also start + in normal mode, so a similar reasoning applies. */ + else if (NONJUMP_INSN_P (BB_END (src_bb))) + emit_insn_after (mode_set, BB_END (src_bb)); else - { - /* It doesn't make sense to switch to normal mode - after a CALL_INSN, so we're going to abort if we - find one. The cases in which a CALL_INSN may - have an abnormal edge are sibcalls and EH edges. - In the case of sibcalls, the dest basic-block is - the EXIT_BLOCK, that runs in normal mode; it is - assumed that a sibcall insn requires normal mode - itself, so no mode switch would be required after - the call (it wouldn't make sense, anyway). In - the case of EH edges, EH entry points also start - in normal mode, so a similar reasoning applies. */ - gcc_assert (NONJUMP_INSN_P (BB_END (src_bb))); - emit_insn_after (mode_set, BB_END (src_bb)); - } + abort (); bb_info[j][src_bb->index].computing = mode; RESET_BIT (transp[src_bb->index], j); } |