From 6f9e260c80f8aa7d49a2c809e17d62686c5f13a6 Mon Sep 17 00:00:00 2001 From: Alexandre Oliva Date: Thu, 28 Jun 2012 07:39:25 +0000 Subject: re PR debug/53740 (--enable-checking=yes,rtl bootstrap failure with ada) PR debug/53740 PR debug/52983 PR debug/48866 * dce.c (word_dce_process_block): Check whether inserting debug temps are needed even for needed insns. (dce_process_block): Likewise. * df-problems.c (dead_debug_add): Add comment about multi-regs. (dead_debug_insert_temp): Likewise. Don't subreg when we're setting fewer regs than a multi-reg requires. From-SVN: r189036 --- gcc/dce.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'gcc/dce.c') diff --git a/gcc/dce.c b/gcc/dce.c index 8954d5c..2e58e43 100644 --- a/gcc/dce.c +++ b/gcc/dce.c @@ -864,9 +864,12 @@ word_dce_process_block (basic_block bb, bool redo_out) anything in local_live. */ if (marked_insn_p (insn)) df_word_lr_simulate_uses (insn, local_live); + /* Insert debug temps for dead REGs used in subsequent debug - insns. */ - else if (debug.used && !bitmap_empty_p (debug.used)) + insns. We may have to emit a debug temp even if the insn + was marked, in case the debug use was after the point of + death. */ + if (debug.used && !bitmap_empty_p (debug.used)) { df_ref *def_rec; @@ -963,9 +966,12 @@ dce_process_block (basic_block bb, bool redo_out, bitmap au) anything in local_live. */ if (needed) df_simulate_uses (insn, local_live); + /* Insert debug temps for dead REGs used in subsequent debug - insns. */ - else if (debug.used && !bitmap_empty_p (debug.used)) + insns. We may have to emit a debug temp even if the insn + was marked, in case the debug use was after the point of + death. */ + if (debug.used && !bitmap_empty_p (debug.used)) for (def_rec = DF_INSN_DEFS (insn); *def_rec; def_rec++) dead_debug_insert_temp (&debug, DF_REF_REGNO (*def_rec), insn, DEBUG_TEMP_BEFORE_WITH_VALUE); -- cgit v1.1