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* [Bug c/98587] New: incorrect format of VLAs and pointer to array for MEM_REF
@ 2021-01-07 18:30 msebor at gcc dot gnu.org
2021-01-07 18:30 ` [Bug c/98587] " msebor at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-01-07 18:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98587
Bug ID: 98587
Summary: incorrect format of VLAs and pointer to array for
MEM_REF
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Testing a fix for pr98578 reveals that MEM_REF accesses to VLAs and pointers to
arrays aren't formatted quite correctly. The VLA format has a spurious
asterisk and the dereference of the pointer to array is not parenthesized as it
should be.
$ cat x.c && gcc -O2 -S -Wall x.c
void f (int);
void g (int n)
{
int a[n];
f (a[1]);
}
void h (int n)
{
int (*p)[n] = __builtin_malloc (n);
f ((*p)[1]);
}
x.c: In function ‘g’:
x.c:6:3: warning: ‘*a[1]’ is used uninitialized [-Wuninitialized]
6 | f (a[1]);
| ^~~~~~~~
x.c: In function ‘h’:
x.c:13:3: warning: ‘*p[1]’ is used uninitialized [-Wuninitialized]
13 | f ((*p)[1]);
| ^~~~~~~~~~~
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/98587] incorrect format of VLAs and pointer to array for MEM_REF
2021-01-07 18:30 [Bug c/98587] New: incorrect format of VLAs and pointer to array for MEM_REF msebor at gcc dot gnu.org
@ 2021-01-07 18:30 ` msebor at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-01-07 18:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98587
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |trivial
Keywords| |diagnostic
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-01-07 18:30 [Bug c/98587] New: incorrect format of VLAs and pointer to array for MEM_REF msebor at gcc dot gnu.org
2021-01-07 18:30 ` [Bug c/98587] " msebor at gcc dot gnu.org
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