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[Bug tree-optimization/65518] gcc consumes all memory with -O3
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 23 Mar 2015 09:31:46 +0000
- Subject: [Bug tree-optimization/65518] gcc consumes all memory with -O3
- Auto-submitted: auto-generated
- References: <bug-65518-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65518
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-03-23
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
else
{
for (i = 0; i < vec_num; i++)
{
and vec_num is 268435456 (after some time) ... looks uninitialized to me.
(gdb) p group_size
$21 = 268435456
for some reason we detect a grouped load with a single load and group size
268435456:
t.c:9:3: note: === vect_analyze_data_ref_accesses ===
t.c:9:3: note: Detected single element interleaving _6->g[0] step 2147483648
t.c:9:3: note: Data access with gaps requires scalar epilogue loop