From 1baf9159af13f8e4f404427831b383b54dcd8f40 Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Mon, 3 Jun 2013 19:38:39 +0200 Subject: [PATCH] re PR rtl-optimization/57268 (c nested loops hang compiler in sched-deps.c) PR rtl-optimization/57268 * sched-deps.c (sched_analyze_2): Don't flush_pedning_lists if DEBUG_INSN_P (insn). Reapply 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: r199615 --- gcc/ChangeLog | 13 +++++++++++++ gcc/sched-deps.c | 11 +++++++++-- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d39bddc03b0..a638f796c30 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,16 @@ +2013-06-03 Jakub Jelinek + + PR rtl-optimization/57268 + * sched-deps.c (sched_analyze_2): Don't flush_pedning_lists + if DEBUG_INSN_P (insn). + + Reapply + 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. + 2013-06-03 Yuri Rumyantsev * config/i386/i386.c (ix86_lea_outperforms): Fix formatting. diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index c7ef1d8e67e..8270d5880cf 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -2690,8 +2690,15 @@ 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 + && !DEBUG_INSN_P (insn)) + flush_pending_lists (deps, insn, true, true); + add_insn_mem_dependence (deps, true, insn, x); + } sched_analyze_2 (deps, XEXP (x, 0), insn);