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| author | Jakub Jelinek <jakub@redhat.com> | 2013-06-03 19:38:39 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-06-03 19:38:39 +0200 |
| commit | 1baf9159af13f8e4f404427831b383b54dcd8f40 (patch) | |
| tree | fe88a886782d4d6ff5fb8743251beea8eb0c7ef4 /gcc/sched-deps.c | |
| parent | 0f1d3965bdd6e7e050763603121662a1251071f2 (diff) | |
| download | gcc-1baf9159af13f8e4f404427831b383b54dcd8f40.zip gcc-1baf9159af13f8e4f404427831b383b54dcd8f40.tar.gz gcc-1baf9159af13f8e4f404427831b383b54dcd8f40.tar.bz2 | |
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 <dinar@kugelworks.com>
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
Diffstat (limited to 'gcc/sched-deps.c')
| -rw-r--r-- | gcc/sched-deps.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index c7ef1d8..8270d58 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); |