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* [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
@ 2021-12-16 16:25 msebor at gcc dot gnu.org
2021-12-16 17:48 ` [Bug middle-end/103751] " schwab@linux-m68k.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-12-16 16:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103751
Bug ID: 103751
Summary: FAIL: gcc.dg/Warray-bounds-48.c (test for excess
errors)
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The two tests below show a coupled of failures with the m68k-unknown-linux-gnu
cross:
Running /src/gcc/master/gcc/testsuite/gcc.dg/dg.exp ...
FAIL: gcc.dg/Warray-bounds-48-novec.c (test for excess errors)
FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
=== gcc Summary ===
# of expected passes 3555
# of unexpected failures 2
# of expected failures 280
/ssd/build/m68k-unknown-linux-gnu/gcc-master/gcc/xgcc version 12.0.0 20211215
(experimental) (GCC)
Excess errors:
/src/gcc/master/gcc/testsuite/gcc.dg/Warray-bounds-48-novec.c:241:50: warning:
array subscript 3 is above array bounds of 'int16_t[1]' {aka 'short int[1]'}
[-Warray-bounds]
/src/gcc/master/gcc/testsuite/gcc.dg/Warray-bounds-48-novec.c:248:64: warning:
array subscript 4 is above array bounds of 'int16_t[1]' {aka 'short int[1]'}
[-Warray-bounds]
Excess errors:
/src/gcc/master/gcc/testsuite/gcc.dg/Warray-bounds-48.c:241:50: warning: array
subscript 3 is above array bounds of 'int16_t[1]' {aka 'short int[1]'}
[-Warray-bounds]
/src/gcc/master/gcc/testsuite/gcc.dg/Warray-bounds-48.c:248:64: warning: array
subscript 4 is above array bounds of 'int16_t[1]' {aka 'short int[1]'}
[-Warray-bounds]
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/103751] FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
2021-12-16 16:25 [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors) msebor at gcc dot gnu.org
@ 2021-12-16 17:48 ` schwab@linux-m68k.org
2021-12-16 19:29 ` [Bug testsuite/103751] " msebor at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: schwab@linux-m68k.org @ 2021-12-16 17:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103751
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
char buf_p2[sizeof (struct A1) + 2 * sizeof (int16_t)];
This has space for 1 * int32_t and 3 * int16_t, so the warning is correct.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug testsuite/103751] FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
2021-12-16 16:25 [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors) msebor at gcc dot gnu.org
2021-12-16 17:48 ` [Bug middle-end/103751] " schwab@linux-m68k.org
@ 2021-12-16 19:29 ` msebor at gcc dot gnu.org
2021-12-16 19:34 ` cvs-commit at gcc dot gnu.org
2021-12-16 19:35 ` msebor at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-12-16 19:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103751
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks|56456 |
Keywords| |diagnostic
Target Milestone|--- |12.0
Ever confirmed|0 |1
Last reconfirmed| |2021-12-16
Status|UNCONFIRMED |ASSIGNED
Component|middle-end |testsuite
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The reason for the unexpected warnings is that the test assumes that a struct
with just two members, a 32-bit int followed by a 16-bit int, is padded to
64-bits. That a valid assumption on many but not all targets. The m68k-*-*
target aligns 32-bit integers on a 16-bit boundary and so it doesn't add any
tail padding to such a struct, so the warnings are valid. Let me fix the test.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug testsuite/103751] FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
2021-12-16 16:25 [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors) msebor at gcc dot gnu.org
2021-12-16 17:48 ` [Bug middle-end/103751] " schwab@linux-m68k.org
2021-12-16 19:29 ` [Bug testsuite/103751] " msebor at gcc dot gnu.org
@ 2021-12-16 19:34 ` cvs-commit at gcc dot gnu.org
2021-12-16 19:35 ` msebor at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-12-16 19:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103751
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:
https://gcc.gnu.org/g:f91814c22595e1db642140efe030caf2c092ab6f
commit r12-6023-gf91814c22595e1db642140efe030caf2c092ab6f
Author: Martin Sebor <msebor@redhat.com>
Date: Thu Dec 16 12:28:03 2021 -0700
Fix member alignment for all targets [PR103751].
Resolves:
PR testsuite/103751 - FAIL: gcc.dg/Warray-bounds-48.c (test for excess
errors)
gcc/testsuite/ChangeLog:
PR testsuite/103751
* gcc.dg/Warray-bounds-48.c: Fix member alignment.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug testsuite/103751] FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors)
2021-12-16 16:25 [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors) msebor at gcc dot gnu.org
` (2 preceding siblings ...)
2021-12-16 19:34 ` cvs-commit at gcc dot gnu.org
@ 2021-12-16 19:35 ` msebor at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-12-16 19:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103751
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2021-12-16 16:25 [Bug middle-end/103751] New: FAIL: gcc.dg/Warray-bounds-48.c (test for excess errors) msebor at gcc dot gnu.org
2021-12-16 17:48 ` [Bug middle-end/103751] " schwab@linux-m68k.org
2021-12-16 19:29 ` [Bug testsuite/103751] " msebor at gcc dot gnu.org
2021-12-16 19:34 ` cvs-commit at gcc dot gnu.org
2021-12-16 19:35 ` msebor at gcc dot gnu.org
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