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* [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand
@ 2015-01-27 5:59 terry.guo at arm dot com
2015-01-27 6:09 ` [Bug rtl-optimization/64815] " pinskia at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: terry.guo at arm dot com @ 2015-01-27 5:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
Bug ID: 64815
Summary: ICE caused by volatile_refs_p doesn't skip NULL
operand
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: terry.guo at arm dot com
I was calling function volatile_refs_p to implement a new feature, and then ran
into below ICE:
f.c: In function 'foo':
f.c:8:1: internal compiler error: Segmentation fault
}
^
0xa52bef crash_signal
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/toplev.c:381
0x9f1edb volatile_refs_p(rtx_def const*)
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/rtlanal.c:2350
0x9f2009 volatile_refs_p(rtx_def const*)
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/rtlanal.c:2389
0x9f2009 volatile_refs_p(rtx_def const*)
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/rtlanal.c:2389
0xefa2fd recog_72
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/config/arm/arm.md:10757
0xefa2fd recog_90
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/config/arm/arm-fixed.md:230
0x9be96b insn_invalid_p(rtx_insn*, bool)
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/recog.c:357
0x9beb50 verify_changes(int)
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/recog.c:455
0x9bedda apply_change_group()
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/recog.c:548
0xf8eb18 cond_exec_process_if_block
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/ifcvt.c:754
0xf93299 cond_exec_find_if_block
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/ifcvt.c:3762
0xf93299 find_if_header
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/ifcvt.c:3444
0xf94c79 if_convert
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/ifcvt.c:4587
0xf94d4d execute
/work/terry/build-toolchain/GCC32RM-448/src/gcc/gcc/ifcvt.c:4780
This happens when volatile_refs_p is recursively scanning operands in below
insn:
(gdb) p debug_rtx(x)
(insn 12 11 51 3 (cond_exec (gt (reg:CC 100 cc)
(const_int 0 [0]))
(set (reg:SI 0 r0 [orig:110 D.4180 ] [110])
(mem/v:SI (reg/v/f:SI 2 r2 [orig:114 c ] [114]) [1 *c_5(D)+0 S4
A32]))) f.c:5 -1
(expr_list:REG_DEAD (reg/v/f:SI 2 r2 [orig:114 c ] [114])
(nil)))
The last operand (nil) in expr_list caused this ICE. By adding below code, I
can avoid such ICE.
int
volatile_refs_p (const_rtx x)
{
if (x == 0)
return 0;
const RTX_CODE code = GET_CODE (x);
........
}
But I am not sure this is the correct fix. Maybe I am calling volatile_refs_p
in wrong way. Please advise.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
@ 2015-01-27 6:09 ` pinskia at gcc dot gnu.org
2015-01-27 6:43 ` terry.guo at arm dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-27 6:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think you need to call volatile_refs_p on the notes part of the
instruciton.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
2015-01-27 6:09 ` [Bug rtl-optimization/64815] " pinskia at gcc dot gnu.org
@ 2015-01-27 6:43 ` terry.guo at arm dot com
2015-01-27 6:57 ` pinskia at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: terry.guo at arm dot com @ 2015-01-27 6:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
--- Comment #2 from Terry Guo <terry.guo at arm dot com> ---
(In reply to Andrew Pinski from comment #1)
> I don't think you need to call volatile_refs_p on the notes part of the
> instruciton.
The volatile_refs_p works in a recursive way which makes itself to scan the
notes part. I just call volatile_refs_p to the insn.
Do you mean I should update volatile_refs_p to avoid recursively scanning the
notes part of the insn?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
2015-01-27 6:09 ` [Bug rtl-optimization/64815] " pinskia at gcc dot gnu.org
2015-01-27 6:43 ` terry.guo at arm dot com
@ 2015-01-27 6:57 ` pinskia at gcc dot gnu.org
2015-01-27 6:58 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-27 6:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Terry Guo from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I don't think you need to call volatile_refs_p on the notes part of the
> > instruciton.
>
> The volatile_refs_p works in a recursive way which makes itself to scan the
> notes part. I just call volatile_refs_p to the insn.
>
> Do you mean I should update volatile_refs_p to avoid recursively scanning
> the notes part of the insn?
Oh you should be using volatile_refs_p on the insn but only the set; maybe even
just the lhs or rhs of the set.
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Terry Guo from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I don't think you need to call volatile_refs_p on the notes part of the
> > instruciton.
>
> The volatile_refs_p works in a recursive way which makes itself to scan the
> notes part. I just call volatile_refs_p to the insn.
>
> Do you mean I should update volatile_refs_p to avoid recursively scanning
> the notes part of the insn?
Oh you should be using volatile_refs_p on the insn but only the set.
dse.c: || volatile_refs_p (PATTERN (insn))
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
` (2 preceding siblings ...)
2015-01-27 6:57 ` pinskia at gcc dot gnu.org
@ 2015-01-27 6:58 ` pinskia at gcc dot gnu.org
2015-01-27 7:47 ` terry.guo at arm dot com
2015-01-28 1:53 ` terry.guo at arm dot com
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-27 6:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Terry Guo from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I don't think you need to call volatile_refs_p on the notes part of the
> > instruciton.
>
> The volatile_refs_p works in a recursive way which makes itself to scan the
> notes part. I just call volatile_refs_p to the insn.
>
> Do you mean I should update volatile_refs_p to avoid recursively scanning
> the notes part of the insn?
Oh you should be using volatile_refs_p on the insn but only the set; maybe even
just the lhs or rhs of the set.
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Terry Guo from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I don't think you need to call volatile_refs_p on the notes part of the
> > instruciton.
>
> The volatile_refs_p works in a recursive way which makes itself to scan the
> notes part. I just call volatile_refs_p to the insn.
>
> Do you mean I should update volatile_refs_p to avoid recursively scanning
> the notes part of the insn?
Oh you should be using volatile_refs_p on the insn but only the set.
dse.c: || volatile_refs_p (PATTERN (insn))
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
` (3 preceding siblings ...)
2015-01-27 6:58 ` pinskia at gcc dot gnu.org
@ 2015-01-27 7:47 ` terry.guo at arm dot com
2015-01-28 1:53 ` terry.guo at arm dot com
5 siblings, 0 replies; 7+ messages in thread
From: terry.guo at arm dot com @ 2015-01-27 7:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
--- Comment #5 from Terry Guo <terry.guo at arm dot com> ---
(In reply to Andrew Pinski from comment #4)
> (In reply to Terry Guo from comment #2)
> > (In reply to Andrew Pinski from comment #1)
> > > I don't think you need to call volatile_refs_p on the notes part of the
> > > instruciton.
> >
> > The volatile_refs_p works in a recursive way which makes itself to scan the
> > notes part. I just call volatile_refs_p to the insn.
> >
> > Do you mean I should update volatile_refs_p to avoid recursively scanning
> > the notes part of the insn?
>
> Oh you should be using volatile_refs_p on the insn but only the set.
>
> dse.c: || volatile_refs_p (PATTERN (insn))
Thanks so much. You are right. The ICE disappears. Please mark this bug as
INVALID.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/64815] ICE caused by volatile_refs_p doesn't skip NULL operand
2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
` (4 preceding siblings ...)
2015-01-27 7:47 ` terry.guo at arm dot com
@ 2015-01-28 1:53 ` terry.guo at arm dot com
5 siblings, 0 replies; 7+ messages in thread
From: terry.guo at arm dot com @ 2015-01-28 1:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64815
Terry Guo <terry.guo at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Terry Guo <terry.guo at arm dot com> ---
I am calling the function in wrong way. Thanks Andrew, now everything is ok.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-01-28 1:53 UTC | newest]
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2015-01-27 5:59 [Bug rtl-optimization/64815] New: ICE caused by volatile_refs_p doesn't skip NULL operand terry.guo at arm dot com
2015-01-27 6:09 ` [Bug rtl-optimization/64815] " pinskia at gcc dot gnu.org
2015-01-27 6:43 ` terry.guo at arm dot com
2015-01-27 6:57 ` pinskia at gcc dot gnu.org
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