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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/98587] New: incorrect format of VLAs and pointer to array for MEM_REF Date: Thu, 07 Jan 2021 18:30:05 +0000 [thread overview] Message-ID: <bug-98587-4@http.gcc.gnu.org/bugzilla/> (raw) 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]); | ^~~~~~~~~~~
next reply other threads:[~2021-01-07 18:30 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-07 18:30 msebor at gcc dot gnu.org [this message] 2021-01-07 18:30 ` [Bug c/98587] " msebor at gcc dot gnu.org
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