From: Jeff Law Date: Fri, 2 Mar 2018 23:47:56 +0000 (-0700) Subject: reorg.c (stop_search_p): Handle DEBUG_INSN. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e9d03821f0a71ce72ab5407709723d32cba93e48;p=gcc.git reorg.c (stop_search_p): Handle DEBUG_INSN. * reorg.c (stop_search_p): Handle DEBUG_INSN. (redundant_insn, fill_simple_delay_slots): Likewise. (fill_slots_from_thread): Likewise. * resource.c (mark_referenced_resources): Likewise. (mark_set_resources, find_dead_or_set_registers): Likewise. From-SVN: r258158 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a05934316e8..ef804524f45 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2018-03-02 Jeff Law + + * reorg.c (stop_search_p): Handle DEBUG_INSN. + (redundant_insn, fill_simple_delay_slots): Likewise. + (fill_slots_from_thread): Likewise. + * resource.c (mark_referenced_resources): Likewise. + (mark_set_resources, find_dead_or_set_registers): Likewise. + 2018-03-02 Jakub Jelinek * substring-locations.h (format_warning_va): Formatting fix for diff --git a/gcc/reorg.c b/gcc/reorg.c index ecdc3752af3..904d91ec9e8 100644 --- a/gcc/reorg.c +++ b/gcc/reorg.c @@ -276,6 +276,7 @@ stop_search_p (rtx_insn *insn, int labels_p) { case NOTE: case CALL_INSN: + case DEBUG_INSN: return 0; case CODE_LABEL: @@ -1493,6 +1494,9 @@ redundant_insn (rtx insn, rtx_insn *target, const vec &delay_list) if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER) continue; + if (GET_CODE (trial) == DEBUG_INSN) + continue; + if (rtx_sequence *seq = dyn_cast (pat)) { /* Stop for a CALL and its delay slots because it is difficult to @@ -1588,6 +1592,9 @@ redundant_insn (rtx insn, rtx_insn *target, const vec &delay_list) if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER) continue; + if (GET_CODE (trial) == DEBUG_INSN) + continue; + if (rtx_sequence *seq = dyn_cast (pat)) { bool annul_p = false; @@ -2020,6 +2027,10 @@ fill_simple_delay_slots (int non_jumps_p) if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER) continue; + /* And DEBUG_INSNs never go into delay slots. */ + if (GET_CODE (trial) == DEBUG_INSN) + continue; + /* Check for resource conflict first, to avoid unnecessary splitting. */ if (! insn_references_resource_p (trial, &set, true) @@ -2142,6 +2153,10 @@ fill_simple_delay_slots (int non_jumps_p) if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER) continue; + /* And DEBUG_INSNs do not go in delay slots. */ + if (GET_CODE (trial) == DEBUG_INSN) + continue; + /* If this already has filled delay slots, get the insn needing the delay slots. */ if (GET_CODE (pat) == SEQUENCE) @@ -2211,8 +2226,8 @@ fill_simple_delay_slots (int non_jumps_p) && ! can_throw_internal (trial)) { /* See comment in relax_delay_slots about necessity of using - next_real_insn here. */ - rtx_insn *new_label = next_real_insn (next_trial); + next_real_nondebug_insn here. */ + rtx_insn *new_label = next_real_nondebug_insn (next_trial); if (new_label != 0) new_label = get_label_before (new_label, JUMP_LABEL (trial)); @@ -2406,6 +2421,9 @@ fill_slots_from_thread (rtx_jump_insn *insn, rtx condition, if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER) continue; + if (GET_CODE (trial) == DEBUG_INSN) + continue; + /* If TRIAL conflicts with the insns ahead of it, we lose. Also, don't separate or copy insns that set and use CC0. */ if (! insn_references_resource_p (trial, &set, true) @@ -3309,10 +3327,10 @@ relax_delay_slots (rtx_insn *first) /* If the first insn at TARGET_LABEL is redundant with a previous insn, redirect the jump to the following insn and process again. - We use next_real_insn instead of next_active_insn so we + We use next_real_nondebug_insn instead of next_active_insn so we don't skip USE-markers, or we'll end up with incorrect liveness info. */ - trial = next_real_insn (target_label); + trial = next_real_nondebug_insn (target_label); if (trial && GET_CODE (PATTERN (trial)) != SEQUENCE && redundant_insn (trial, insn, vNULL) && ! can_throw_internal (trial)) @@ -3327,7 +3345,7 @@ relax_delay_slots (rtx_insn *first) { /* Insert the special USE insn and update dataflow info. We know "trial" is an insn here as it is the output of - next_real_insn () above. */ + next_real_nondebug_insn () above. */ update_block (as_a (trial), tmp); /* Now emit a label before the special USE insn, and diff --git a/gcc/resource.c b/gcc/resource.c index ff194bb0be0..0822daebde7 100644 --- a/gcc/resource.c +++ b/gcc/resource.c @@ -212,6 +212,7 @@ mark_referenced_resources (rtx x, struct resources *res, case PC: case SYMBOL_REF: case LABEL_REF: + case DEBUG_INSN: return; case SUBREG: @@ -451,6 +452,7 @@ find_dead_or_set_registers (rtx_insn *target, struct resources *res, case BARRIER: case NOTE: + case DEBUG_INSN: continue; case INSN: @@ -639,6 +641,7 @@ mark_set_resources (rtx x, struct resources *res, int in_dest, case SYMBOL_REF: case CONST: case PC: + case DEBUG_INSN: /* These don't set any resources. */ return;