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* [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
@ 2021-11-23 7:41 marxin at gcc dot gnu.org
2021-11-23 7:52 ` [Bug middle-end/103374] " ebotcazou at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-11-23 7:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
Bug ID: 103374
Summary: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented:
__builtin_clear_padding not supported for variable
length aggregates
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: qing.zhao at oracle dot com
Target Milestone: ---
I tried bootstrapping GCC with -ftrivial-auto-var-init=pattern but it fails
here:
[ 978s]
/home/abuild/rpmbuild/BUILD/gcc-12.0.0+git189862/obj-i586-suse-linux/./prev-gcc/xgcc
-B/home/abuild/rpmbuild/BUILD/gcc-12.0.0+git189862/obj-i586-suse-linux/./prev-gcc/
-B/usr/i586-suse-linux/bin/ -B/usr/i586-suse-linux/bin/
-B/usr/i586-suse-linux/lib/ -isystem /usr/i586-suse-linux/include -isystem
/usr/i586-suse-linux/sys-include -fno-checking -c -fomit-frame-pointer -O3
-D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables
-fstack-clash-protection -Werror=return-type -Wno-error
-ftrivial-auto-var-init=pattern -g -U_FORTIFY_SOURCE -fno-checking -gtoggle
-fprofile-generate -gnatpg -W -Wall -nostdinc -I- -I. -Iada/generated -Iada
-I../../gcc/ada -Iada/libgnat -I../../gcc/ada/libgnat -Iada/gcc-interface
-I../../gcc/ada/gcc-interface ../../gcc/ada/exp_ch4.adb -o ada/exp_ch4.o
[ 979s] ../../gcc/ada/exp_ch4.adb: In function
'Exp_Ch4.Expand_N_Indexed_Component':
[ 979s] ../../gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented:
__builtin_clear_padding not supported for variable length aggregates
[ 979s] make[3]: *** [../../gcc/ada/gcc-interface/Make-lang.in:167:
ada/exp_ch4.o] Error 1
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/103374] sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
@ 2021-11-23 7:52 ` ebotcazou at gcc dot gnu.org
2021-11-23 8:05 ` pinskia at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2021-11-23 7:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|ada |middle-end
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
CC| |ebotcazou at gcc dot gnu.org
Summary|gcc/ada/exp_ch4.adb:7165:10 |sorry, unimplemented:
|: sorry, unimplemented: |__builtin_clear_padding not
|__builtin_clear_padding not |supported for variable
|supported for variable |length aggregates
|length aggregates |
Last reconfirmed| |2021-11-23
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Recategorizing.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/103374] sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
2021-11-23 7:52 ` [Bug middle-end/103374] " ebotcazou at gcc dot gnu.org
@ 2021-11-23 8:05 ` pinskia at gcc dot gnu.org
2021-11-23 8:12 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-11-23 8:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced C testcase:
int f(int t)
{
struct s{int y[t];};
struct s u;
return u.y[0];
}
Compile with -ftrivial-auto-var-init=pattern .
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/103374] sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
2021-11-23 7:52 ` [Bug middle-end/103374] " ebotcazou at gcc dot gnu.org
2021-11-23 8:05 ` pinskia at gcc dot gnu.org
@ 2021-11-23 8:12 ` marxin at gcc dot gnu.org
2021-11-23 8:16 ` pinskia at gcc dot gnu.org
2021-11-23 13:27 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-11-23 8:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Thank you Andrew for the C test-case.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/103374] sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
` (2 preceding siblings ...)
2021-11-23 8:12 ` marxin at gcc dot gnu.org
@ 2021-11-23 8:16 ` pinskia at gcc dot gnu.org
2021-11-23 13:27 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-11-23 8:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> Thank you Andrew for the C test-case.
It was easy to generate knowing what Ada code has and understanding the sorry
message and knowing the reason why GNU C exposes these kind of structures to
basically test what Ada front-end produces also.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/103374] sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates
2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
` (3 preceding siblings ...)
2021-11-23 8:16 ` pinskia at gcc dot gnu.org
@ 2021-11-23 13:27 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-11-23 13:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103374
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
__builtin_clear_padding is intended primarily for C++ which doesn't have these,
I have no plans to support variable length structures in there. So, probably
gimplify_decl_expr should next to clear_padding_type_may_have_padding_p
also check that int_size_in_bytes (strip_array_types (TREE_TYPE (decl))) > 0
(while zero sized types can be handled, there is certainly no padding in them,
so > 0 rather than >= 0).
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-11-23 13:27 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2021-11-23 7:41 [Bug ada/103374] New: gcc/ada/exp_ch4.adb:7165:10: sorry, unimplemented: __builtin_clear_padding not supported for variable length aggregates marxin at gcc dot gnu.org
2021-11-23 7:52 ` [Bug middle-end/103374] " ebotcazou at gcc dot gnu.org
2021-11-23 8:05 ` pinskia at gcc dot gnu.org
2021-11-23 8:12 ` marxin at gcc dot gnu.org
2021-11-23 8:16 ` pinskia at gcc dot gnu.org
2021-11-23 13:27 ` jakub at gcc dot gnu.org
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