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From: "munroesj at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/96139] New: Vector element extract mistypes long long int
 down to long int
Date: Thu, 09 Jul 2020 19:44:38 +0000
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X-Bugzilla-Component: c
X-Bugzilla-Version: 9.3.1
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96139

            Bug ID: 96139
           Summary: Vector element extract mistypes long long int down to
                    long int
           Product: gcc
           Version: 9.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: munroesj at gcc dot gnu.org
  Target Milestone: ---

When printing vector element for example:
  printf ("%s %016llx,%016llx\n", prefix, val[1], val[0]);

where val is a vector unsigned long long int -Wall reports:

../src/printll.c: In function =E2=80=98print_v2xint64=E2=80=99:
../src/printll.c:20:21: warning: format =E2=80=98%llx=E2=80=99 expects argu=
ment of type =E2=80=98long
long unsigned int=E2=80=99, but argument 3 has type =E2=80=98long unsigned =
int=E2=80=99 [-Wformat=3D]
   printf ("%s %016llx,%016llx\n", prefix, val[1], val[0]);
                     ^

Here gcc claims that val[1] is a =E2=80=98long unsigned int=E2=80=99 then i=
t is actually typed
as:

typedef __vector unsigned long long int vui64_t;

Some how the vector element extract has dropped the long long int type to l=
ong
int. This should not be an issue for PPC64 as long long int and long int are
both 64-bit but would matter for PPC32.=