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* [Bug bootstrap/53427] New: [4.8 Regression] Bootstrap failure
@ 2012-05-20 18:41 hjl.tools at gmail dot com
2012-05-20 20:01 ` [Bug bootstrap/53427] " ubizjak at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: hjl.tools at gmail dot com @ 2012-05-20 18:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53427
Bug #: 53427
Summary: [4.8 Regression] Bootstrap failure
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hjl.tools@gmail.com
CC: areg.melikadamyan@gmail.com, ubizjak@gmail.com
Target: x86-64
On Linux/x86-64, bootstrap failed with -mavx:
[hjl@gnu-6 gcc]$ cat /tmp/foo.c
struct gomp_task {
void *fn_data;
};
extern void *gomp_malloc (unsigned long int);
void GOMP_task (void (*fn) (void *), void *data,
void (*cpyfn) (void *, void *),
long arg_size, long arg_align)
{
struct gomp_task *task;
char *arg;
task = gomp_malloc (sizeof (*task) + arg_size + arg_align - 1);
__builtin_memcpy (arg, data, arg_size);
task->fn_data = arg;
}
[hjl@gnu-6 gcc]$ ./xgcc -B./ -S -O2 /tmp/foo.c -mavx -m64
/tmp/foo.c: In function \u2018GOMP_task\u2019:
/tmp/foo.c:14:1: internal compiler error: Segmentation fault
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 gcc]$
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug bootstrap/53427] [4.8 Regression] Bootstrap failure
2012-05-20 18:41 [Bug bootstrap/53427] New: [4.8 Regression] Bootstrap failure hjl.tools at gmail dot com
@ 2012-05-20 20:01 ` ubizjak at gmail dot com
2012-05-20 20:02 ` [Bug middle-end/53427] " pinskia at gcc dot gnu.org
2012-05-20 20:02 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: ubizjak at gmail dot com @ 2012-05-20 20:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53427
--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-20 19:14:20 UTC ---
(gdb) bt
#0 save_call_clobbered_regs () at ../../gcc-svn/trunk/gcc/caller-save.c:877
#1 0x0000000000873bd7 in reload (first=0x7ffff1b100c0, global=1) at
../../gcc-svn/trunk/gcc/reload1.c:939
#2 0x00000000007b6488 in do_reload () at ../../gcc-svn/trunk/gcc/ira.c:4261
#3 rest_of_handle_reload () at ../../gcc-svn/trunk/gcc/ira.c:4352
#4 0x0000000000827645 in execute_one_pass (pass=0x1427920) at
../../gcc-svn/trunk/gcc/passes.c:2183
#5 0x0000000000827a05 in execute_pass_list (pass=0x1427920) at
../../gcc-svn/trunk/gcc/passes.c:2238
#6 0x0000000000827a17 in execute_pass_list (pass=0x1428060) at
../../gcc-svn/trunk/gcc/passes.c:2239
#7 0x0000000000616688 in expand_function (node=0x7ffff19b1750) at
../../gcc-svn/trunk/gcc/cgraphunit.c:1603
#8 0x000000000061822b in expand_all_functions () at
../../gcc-svn/trunk/gcc/cgraphunit.c:1708
#9 compile () at ../../gcc-svn/trunk/gcc/cgraphunit.c:2007
(gdb) list
872 && HARD_REGISTER_P (cheap)
873 && TEST_HARD_REG_BIT (call_used_reg_set, REGNO
(cheap)))
874 {
875 rtx call_set = single_set (insn);
876 rtx dest = SET_DEST (call_set);
877 rtx pat = gen_rtx_SET (VOIDmode, cheap,
878 copy_rtx (dest));
879 chain = insert_one_insn (chain, 0, -1, pat);
880 }
881 }
(gdb) p call_set
$7 = (rtx_def *) 0x0
(gdb) p debug_rtx (insn)
(call_insn 22 21 25 2 (parallel [
(set (reg:DI 0 ax)
(call (mem:QI (symbol_ref:DI ("memcpy") [flags 0x41]
<function_decl 0x7ffff1aee600 memcpy>) [0 memcpy S1 A8])
(const_int 0 [0])))
(unspec [
(const_int 2 [0x2])
] UNSPEC_CALL_NEEDS_VZEROUPPER)
]) pr53427.c:12 632 {*call_value_vzeroupper}
(expr_list:REG_RETURNED (reg/v/f:DI 2 cx [orig:64 arg ] [64])
(expr_list:REG_DEAD (reg:DI 5 di)
(expr_list:REG_DEAD (reg:DI 4 si)
(expr_list:REG_DEAD (reg:DI 1 dx)
(expr_list:REG_UNUSED (reg:DI 0 ax)
(expr_list:REG_EH_REGION (const_int 0 [0])
(nil)))))))
(expr_list:REG_FRAME_RELATED_EXPR (set (reg:DI 0 ax)
(reg:DI 5 di))
(expr_list:REG_FRAME_RELATED_EXPR (use (reg:DI 5 di))
(expr_list:REG_FRAME_RELATED_EXPR (use (reg:DI 4 si))
(expr_list:REG_FRAME_RELATED_EXPR (use (reg:DI 1 dx))
(nil))))))
As said elsewhere, tagging call insns with vzeroupper unspecs was not a good
idea. While it worked, it is very fragile and not future proof.
Please look at PR 47440. The fix for that PR will magically avoid failures of
this type.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/53427] [4.8 Regression] Bootstrap failure
2012-05-20 18:41 [Bug bootstrap/53427] New: [4.8 Regression] Bootstrap failure hjl.tools at gmail dot com
2012-05-20 20:01 ` [Bug bootstrap/53427] " ubizjak at gmail dot com
@ 2012-05-20 20:02 ` pinskia at gcc dot gnu.org
2012-05-20 20:02 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-05-20 20:02 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53427
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build, ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-05-20
Component|bootstrap |middle-end
Target Milestone|--- |4.8.0
Ever Confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-20 19:34:29 UTC ---
Confirmed:
Program received signal SIGSEGV, Segmentation fault.
0x0000000000871943 in save_call_clobbered_regs () at
/home/pinskia/src/local/gcc/gcc/caller-save.c:876
876 rtx dest = SET_DEST (call_set);
(gdb) bt
#0 0x0000000000871943 in save_call_clobbered_regs () at
/home/pinskia/src/local/gcc/gcc/caller-save.c:876
#1 0x0000000001854572 in reload (first=0x7ffff711d0c0, global=1) at
/home/pinskia/src/local/gcc/gcc/reload1.c:939
#2 0x000000000127c20a in do_reload () at
/home/pinskia/src/local/gcc/gcc/ira.c:4261
#3 0x000000000127c3b9 in rest_of_handle_reload () at
/home/pinskia/src/local/gcc/gcc/ira.c:4352
#4 0x000000000166d66c in execute_one_pass (pass=0x4cd7980) at
/home/pinskia/src/local/gcc/gcc/passes.c:2183
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/53427] [4.8 Regression] Bootstrap failure
2012-05-20 18:41 [Bug bootstrap/53427] New: [4.8 Regression] Bootstrap failure hjl.tools at gmail dot com
2012-05-20 20:01 ` [Bug bootstrap/53427] " ubizjak at gmail dot com
2012-05-20 20:02 ` [Bug middle-end/53427] " pinskia at gcc dot gnu.org
@ 2012-05-20 20:02 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-05-20 20:02 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53427
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-20 19:36:25 UTC ---
This is a dup of bug 53373. No reason for keeping this around.
*** This bug has been marked as a duplicate of bug 53373 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-05-20 20:02 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2012-05-20 18:41 [Bug bootstrap/53427] New: [4.8 Regression] Bootstrap failure hjl.tools at gmail dot com
2012-05-20 20:01 ` [Bug bootstrap/53427] " ubizjak at gmail dot com
2012-05-20 20:02 ` [Bug middle-end/53427] " pinskia at gcc dot gnu.org
2012-05-20 20:02 ` pinskia at gcc dot gnu.org
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