[Bug target/25042] New: __float128 ICE on x86

[jsm28 at gcc dot gnu dot org]

Compile the following test (reduced from
gcc.dg/torture/fp-int-convert-float128.c) on i686-pc-linux-gnu with -O -mmmx. 
It gives an ICE

z.c: In function 'main':
z.c:9: internal compiler error: in cgraph_local_info, at cgraph.c:525
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

I don't know if __float128 is meant to be supported on x86 (provided the user
provides the external library with the relevant functions) or not (it's an
optional part of the x86_64 ABI), but it should not ICE in any case; it should
generate meaningful code or a meaningful error.  (-mmmx is required for the
__float128 type to be available on x86.)

extern void abort (void);
extern void exit (int);

int
main (void)
{
  static volatile int i;
  static volatile __float128 a;
  a = i;
  if (0 != a)
    abort ();
  exit (0);
}


-- 
           Summary: __float128 ICE on x86
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jsm28 at gcc dot gnu dot org
GCC target triplet: i?86-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25042