[Bug target/35713] New: invalid type for va_arg with _Decimal128

["janis at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

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Using va_arg with _Decimal128 for powerpc-linux results in an error
message followed by an ICE, resulting in several new failing GCC
tests.

This testcase:

    void
    foo (int n, ...)
    {
      __builtin_va_list ap;
      _Decimal128 x;

      __builtin_va_start (ap, n);
      x = __builtin_va_arg (ap, _Decimal128);
      __builtin_va_end (ap);
    }

results in these messages:

    elm3b145% /opt/gcc-nightly/trunk/bin/gcc -c va.c
    va.c: In function ‘foo’:
    va.c:3: error: type mismatch in binary expression
    unsigned char

    unsigned char

    unsigned int

    D.1240 = D.1239 | 1
    va.c:3: internal compiler error: verify_gimple failed
    Please submit a full bug report,
    with preprocessed source if appropriate.
    See <http://gcc.gnu.org/bugs.html> for instructions.

The failure becomes apparent with r133479, but it also happens with earlier
GCC sources configured with --enable-checking=types.

I plan to continue investigating this problem.


-- 
           Summary: invalid type for va_arg with _Decimal128
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: janis at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35713