diff options
Diffstat (limited to 'gcc/sched-deps.c')
| -rw-r--r-- | gcc/sched-deps.c | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index b62797f..b8b3a44 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -2121,16 +2121,6 @@ sched_analyze_insn (struct deps *deps, rtx x, rtx insn) reg_pending_barrier = NOT_A_BARRIER; } - /* If we are currently in a libcall scheduling group, then mark the - current insn as being in a scheduling group and that it can not - be moved into a different basic block. */ - - if (deps->libcall_block_tail_insn) - { - SCHED_GROUP_P (insn) = 1; - CANT_MOVE (insn) = 1; - } - /* If a post-call group is still open, see if it should remain so. This insn must be a simple move of a hard reg to a pseudo or vice-versa. @@ -2226,8 +2216,6 @@ sched_analyze (struct deps *deps, rtx head, rtx tail) } for (insn = head;; insn = NEXT_INSN (insn)) { - rtx link, end_seq, r0, set; - if (INSN_P (insn)) { /* And initialize deps_lists. */ @@ -2326,45 +2314,6 @@ sched_analyze (struct deps *deps, rtx head, rtx tail) if (current_sched_info->use_cselib) cselib_process_insn (insn); - /* Now that we have completed handling INSN, check and see if it is - a CLOBBER beginning a libcall block. If it is, record the - end of the libcall sequence. - - We want to schedule libcall blocks as a unit before reload. While - this restricts scheduling, it preserves the meaning of a libcall - block. - - As a side effect, we may get better code due to decreased register - pressure as well as less chance of a foreign insn appearing in - a libcall block. */ - if (!reload_completed - /* Note we may have nested libcall sequences. We only care about - the outermost libcall sequence. */ - && deps->libcall_block_tail_insn == 0 - /* The sequence must start with a clobber of a register. */ - && NONJUMP_INSN_P (insn) - && GET_CODE (PATTERN (insn)) == CLOBBER - && (r0 = XEXP (PATTERN (insn), 0), REG_P (r0)) - && REG_P (XEXP (PATTERN (insn), 0)) - /* The CLOBBER must also have a REG_LIBCALL note attached. */ - && (link = find_reg_note (insn, REG_LIBCALL, NULL_RTX)) != 0 - && (end_seq = XEXP (link, 0)) != 0 - /* The insn referenced by the REG_LIBCALL note must be a - simple nop copy with the same destination as the register - mentioned in the clobber. */ - && (set = single_set (end_seq)) != 0 - && SET_DEST (set) == r0 && SET_SRC (set) == r0 - /* And finally the insn referenced by the REG_LIBCALL must - also contain a REG_EQUAL note and a REG_RETVAL note. */ - && find_reg_note (end_seq, REG_EQUAL, NULL_RTX) != 0 - && find_reg_note (end_seq, REG_RETVAL, NULL_RTX) != 0) - deps->libcall_block_tail_insn = XEXP (link, 0); - - /* If we have reached the end of a libcall block, then close the - block. */ - if (deps->libcall_block_tail_insn == insn) - deps->libcall_block_tail_insn = 0; - if (insn == tail) { if (current_sched_info->use_cselib) @@ -2452,7 +2401,6 @@ init_deps (struct deps *deps) deps->last_function_call = 0; deps->sched_before_next_call = 0; deps->in_post_call_group_p = not_post_call; - deps->libcall_block_tail_insn = 0; } /* Free insn lists found in DEPS. */ |