From c359d8d046a4c0d773979c6668d34a80d9ae99a5 Mon Sep 17 00:00:00 2001 From: Dinar Temirbulatov Date: Fri, 31 May 2013 23:20:17 +0000 Subject: [PATCH] re PR rtl-optimization/57268 (c nested loops hang compiler in sched-deps.c) 2013-05-31 Dinar Temirbulatov PR rtl-optimization/57268 * sched-deps.c (sched_analyze_2): Flush dependence lists if the sum of the read and write lists exceeds MAX_PENDING_LIST_LENGTH. From-SVN: r199564 --- gcc/ChangeLog | 6 ++++++ gcc/sched-deps.c | 10 ++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0dbe13ae2bb..39f24a65819 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2013-05-31 Dinar Temirbulatov + + PR rtl-optimization/57268 + * sched-deps.c (sched_analyze_2): Flush dependence lists if + the sum of the read and write lists exceeds MAX_PENDING_LIST_LENGTH. + 2013-05-31 Eric Botcazou * config/rs6000/predicates.md (rs6000_cbranch_operator): Accept some diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index c7ef1d8e67e..190fd4eb4bf 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -2690,8 +2690,14 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn) /* Always add these dependencies to pending_reads, since this insn may be followed by a write. */ - if (!deps->readonly) - add_insn_mem_dependence (deps, true, insn, x); + if (!deps->readonly) + { + if ((deps->pending_read_list_length + + deps->pending_write_list_length) + > MAX_PENDING_LIST_LENGTH) + flush_pending_lists (deps, insn, true, true); + add_insn_mem_dependence (deps, true, insn, x); + } sched_analyze_2 (deps, XEXP (x, 0), insn);