From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-248493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 14044 invoked by alias); 27 Mar 2008 00:00:29 -0000
Received: (qmail 13505 invoked by uid 48); 26 Mar 2008 23:59:46 -0000
Date: Thu, 27 Mar 2008 00:00:00 -0000
Subject: [Bug target/35713]  New: invalid type for va_arg with _Decimal128
X-Bugzilla-Reason: CC
Message-ID: <bug-35713-4503@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "janis at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2008-03/txt/msg02119.txt.bz2

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