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* [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0"
@ 2021-10-26 17:36 msebor at gcc dot gnu.org
2021-10-26 22:28 ` [Bug middle-end/102955] " pinskia at gcc dot gnu.org
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-10-26 17:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Bug ID: 102955
Summary: assembler errors when bootstrapping with #pragma
optimize "0"
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
This is to make a record of a problem I recently ran into with GCC 12 and that
apparently others have as well. As discussed here:
https://gcc.gnu.org/pipermail/gcc/2021-October/237616.html
Putting #pragma GCC optimize "0" at the top of gimplify.c to debug something in
a bootstrapped compiler causes the file to fail to assemble with a stage 2 GCC
due to many assembler errors like this:
/tmp/ccL9zcXD.s: Assembler messages:
/tmp/ccL9zcXD.s:9: Error: CFI instruction used without previous
.cfi_startproc
The top of gimplify.s is below (this is with no other code changes to any files
except the #pragma).
.file "gimplify.c"
.text
.local _ZZ20gimplify_va_arg_exprPP9tree_nodePP6gimpleS4_E9gave_help
.comm
_ZZ20gimplify_va_arg_exprPP9tree_nodePP6gimpleS4_E9gave_help,1,1
.p2align 4
.type _ZL19handled_component_pPK9tree_node, @function
_ZL19handled_component_pPK9tree_node:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movq %rdi, -8(%rbp)
movq -8(%rbp), %rax
movzwl (%rax), %eax
movzwl %ax, %eax
subl $47, %eax
cmpl $6, %eax
ja .L2
movl $1, %eax
jmp .L3
.L2:
movl $0, %eax
.L3:
popq %rbp
.cfi_def_cfa 7, 8
ret
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
@ 2021-10-26 22:28 ` pinskia at gcc dot gnu.org
2021-10-26 22:29 ` [Bug debug/102955] " pinskia at gcc dot gnu.org
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 22:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, maybe -gtoggle is the cause ....
Because stage3 works ...
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
2021-10-26 22:28 ` [Bug middle-end/102955] " pinskia at gcc dot gnu.org
@ 2021-10-26 22:29 ` pinskia at gcc dot gnu.org
2021-10-26 22:32 ` pinskia at gcc dot gnu.org
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 22:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Hmm, maybe -gtoggle is the cause ....
> Because stage3 works ...
Yes it is -gtoggle issue.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
2021-10-26 22:28 ` [Bug middle-end/102955] " pinskia at gcc dot gnu.org
2021-10-26 22:29 ` [Bug debug/102955] " pinskia at gcc dot gnu.org
@ 2021-10-26 22:32 ` pinskia at gcc dot gnu.org
2021-10-26 22:35 ` pinskia at gcc dot gnu.org
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 22:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 51671
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51671&action=edit
gimplify.ii from aarch64 (bz2)
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (2 preceding siblings ...)
2021-10-26 22:32 ` pinskia at gcc dot gnu.org
@ 2021-10-26 22:35 ` pinskia at gcc dot gnu.org
2021-10-26 22:42 ` pinskia at gcc dot gnu.org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 22:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Without -O2 we get an ICE:
ubuntu@ubuntu:~/src/upstream-gcc-aarch64/gcc/objdir/gcc\# ../stage1-gcc/xgcc
-B../stage1-gcc gimplify.ii -c -g2 -gtoggle
during RTL pass: final
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/gimplify.c: In function
‘gimplify_omp_ctx* new_omp_context(omp_region_type)’:
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/gimplify.c:472:1: internal
compiler error: Segmentation fault
472 | }
| ^
0x18fd7e3 crash_signal
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/toplev.c:322
0x122e09b dw2_asm_output_delta_uleb128(char const*, char const*, char const*,
...)
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/dwarf2asm.c:863
0x12e2b3b dw2_output_call_site_table
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/except.c:2857
0x12e3573 output_one_function_exception_table
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/except.c:3141
0x12e38f3 output_function_exception_table(int)
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/except.c:3228
0x1352dcb rest_of_handle_final
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/final.c:4298
0x1353187 execute
/home/ubuntu/src/upstream-gcc-aarch64/gcc/gcc/final.c:4363
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (3 preceding siblings ...)
2021-10-26 22:35 ` pinskia at gcc dot gnu.org
@ 2021-10-26 22:42 ` pinskia at gcc dot gnu.org
2021-10-26 23:05 ` pinskia at gcc dot gnu.org
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 22:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu.org
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> Without -O2 we get an ICE:
With -fno-exceptions removes the ICE but the assembler error is still there.
Reducing ....
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] assembler errors when bootstrapping with #pragma optimize "0"
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (4 preceding siblings ...)
2021-10-26 22:42 ` pinskia at gcc dot gnu.org
@ 2021-10-26 23:05 ` pinskia at gcc dot gnu.org
2021-10-26 23:07 ` [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" and -g -gtoggle pinskia at gcc dot gnu.org
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 23:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-10-26
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase compile with -g -gtoggle:
#pragma GCC optimize "0"
struct j
{
explicit j ();
~j ();
};
void g (void)
{
new j();
}
---- CUT ---
The ICE changes to the assembler failure if you add -fno-exceptions even.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (5 preceding siblings ...)
2021-10-26 23:05 ` pinskia at gcc dot gnu.org
@ 2021-10-26 23:07 ` pinskia at gcc dot gnu.org
2021-10-26 23:12 ` pinskia at gcc dot gnu.org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 23:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|assembler errors when |[12 Regression] ICE with
|bootstrapping with #pragma |#pragma optimize "0" and -g
|optimize "0" |-gtoggle
Known to work| |10.1.0, 11.1.0
Target Milestone|--- |12.0
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
And it is a regression in trunk.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (6 preceding siblings ...)
2021-10-26 23:07 ` [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" and -g -gtoggle pinskia at gcc dot gnu.org
@ 2021-10-26 23:12 ` pinskia at gcc dot gnu.org
2021-10-28 10:02 ` acoplan at gcc dot gnu.org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-26 23:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
A bisection would be good.
I am suspecting r12-4608-b4702276615f or r12-4038-g6de9f0c13b27c .
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (7 preceding siblings ...)
2021-10-26 23:12 ` pinskia at gcc dot gnu.org
@ 2021-10-28 10:02 ` acoplan at gcc dot gnu.org
2021-10-28 22:35 ` [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize " pinskia at gcc dot gnu.org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: acoplan at gcc dot gnu.org @ 2021-10-28 10:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Alex Coplan <acoplan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |acoplan at gcc dot gnu.org
--- Comment #9 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Started with r12-4608-gb4702276615ff8d43bc910e7a54fdd850ad8d461:
commit b4702276615ff8d43bc910e7a54fdd850ad8d461
Author: Martin Liska <mliska@suse.cz>
Date: Thu Oct 14 13:57:18 2021
options: Fix variable tracking option processing.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (8 preceding siblings ...)
2021-10-28 10:02 ` acoplan at gcc dot gnu.org
@ 2021-10-28 22:35 ` pinskia at gcc dot gnu.org
2021-11-01 3:59 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-28 22:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |blocker
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this breaks Ada building on some darwin targets because ada/sigtramp-ios.c
use the attribute optimize.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (9 preceding siblings ...)
2021-10-28 22:35 ` [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize " pinskia at gcc dot gnu.org
@ 2021-11-01 3:59 ` marxin at gcc dot gnu.org
2021-11-05 12:01 ` cvs-commit at gcc dot gnu.org
2021-11-05 12:02 ` marxin at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-11-01 3:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Status|NEW |ASSIGNED
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Mine, thanks for the reduction.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (10 preceding siblings ...)
2021-11-01 3:59 ` marxin at gcc dot gnu.org
@ 2021-11-05 12:01 ` cvs-commit at gcc dot gnu.org
2021-11-05 12:02 ` marxin at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-11-05 12:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>:
https://gcc.gnu.org/g:14c7041a1f00ef4ee9a036e0b369c97646db5b5c
commit r12-4934-g14c7041a1f00ef4ee9a036e0b369c97646db5b5c
Author: Martin Liska <mliska@suse.cz>
Date: Mon Nov 1 16:28:34 2021 +0100
Reset when -gtoggle is used in gcc_options.
PR debug/102955
gcc/ChangeLog:
* opts.c (finish_options): Reset flag_gtoggle when it is used.
gcc/testsuite/ChangeLog:
* g++.dg/pr102955.C: New test.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug debug/102955] [12 Regression] ICE with #pragma optimize "0" or attribute optimize and -g -gtoggle
2021-10-26 17:36 [Bug bootstrap/102955] New: assembler errors when bootstrapping with #pragma optimize "0" msebor at gcc dot gnu.org
` (11 preceding siblings ...)
2021-11-05 12:01 ` cvs-commit at gcc dot gnu.org
@ 2021-11-05 12:02 ` marxin at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-11-05 12:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102955
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Should be fixed now.
^ permalink raw reply [flat|nested] 14+ messages in thread
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