diff options
Diffstat (limited to 'gcc/sched-deps.c')
| -rw-r--r-- | gcc/sched-deps.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index 7802bf23e61..c1c4ece2e8e 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -1145,13 +1145,21 @@ sched_analyze_insn (struct deps *deps, rtx x, rtx insn, rtx loop_notes) if (src_regno < FIRST_PSEUDO_REGISTER || dest_regno < FIRST_PSEUDO_REGISTER) { - set_sched_group_p (insn); + /* If we are inside a post-call group right at the start of the + scheduling region, we must not add a dependency. */ + if (deps->in_post_call_group_p == post_call_initial) + { + SCHED_GROUP_P (insn) = 1; + deps->in_post_call_group_p = post_call; + } + else + set_sched_group_p (insn); CANT_MOVE (insn) = 1; } else { end_call_group: - deps->in_post_call_group_p = false; + deps->in_post_call_group_p = not_post_call; } } } @@ -1168,6 +1176,15 @@ sched_analyze (struct deps *deps, rtx head, rtx tail) if (current_sched_info->use_cselib) cselib_init (true); + /* Before reload, if the previous block ended in a call, show that + we are inside a post-call group, so as to keep the lifetimes of + hard registers correct. */ + if (! reload_completed && GET_CODE (head) != CODE_LABEL) + { + insn = prev_nonnote_insn (head); + if (insn && GET_CODE (insn) == CALL_INSN) + deps->in_post_call_group_p = post_call_initial; + } for (insn = head;; insn = NEXT_INSN (insn)) { rtx link, end_seq, r0, set; @@ -1259,7 +1276,7 @@ sched_analyze (struct deps *deps, rtx head, rtx tail) /* Before reload, begin a post-call group, so as to keep the lifetimes of hard registers correct. */ if (! reload_completed) - deps->in_post_call_group_p = true; + deps->in_post_call_group_p = post_call; } /* See comments on reemit_notes as to why we do this. @@ -1420,7 +1437,7 @@ init_deps (struct deps *deps) deps->last_pending_memory_flush = 0; deps->last_function_call = 0; deps->sched_before_next_call = 0; - deps->in_post_call_group_p = false; + deps->in_post_call_group_p = not_post_call; deps->libcall_block_tail_insn = 0; } |