[Bug c/106015] New: [PowerPC] pointer to MMA accumulator not convertible to char pointer

[Bug c/106015] New: [PowerPC] pointer to MMA accumulator not convertible to char pointer

[nemanja.i.ibm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106015

            Bug ID: 106015
           Summary: [PowerPC] pointer to MMA accumulator not convertible
                    to char pointer
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nemanja.i.ibm at gmail dot com
  Target Milestone: ---

Code:
$ cat aa.c 
unsigned char *conv(__vector_quad *a) {
  return (unsigned char *)a;
}

Compile:
gcc -mcpu=power10 -O3 aa.c -S
aa.c:2:3: error: invalid conversion from type '* __vector_quad'
    2 |   return (unsigned char *)a;
      |   ^~~~~~

Version:
gcc --version
gcc (GCC) 12.1.1 20220524 [releases/gcc-12 r12-8410-gf0a0aeec44]
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[Bug target/106015] [PowerPC] pointer to MMA accumulator not convertible to char pointer

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106015

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-06-17

--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
Confirmed.

[Bug target/106015] [PowerPC] pointer to MMA accumulator not convertible to char pointer

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106015

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed.  Likely the same cause as PR106017.

[Bug target/106015] [PowerPC] pointer to MMA accumulator not convertible to char pointer

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106015

--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
I think we just want to remove the entire section in
rs6000_invalid_conversion() that checks the XOmode/OOmode pointer conversions. 
Doing that fixes the ICE and fixes the PR106015 ICE too.  I'm doing a bootstrap
and regtest of that patch now.

[Bug target/106015] [PowerPC] pointer to MMA accumulator not convertible to char pointer

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106015

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> ---
Having looked at PR106017, this is a dup of that.  Closing.

*** This bug has been marked as a duplicate of bug 106017 ***