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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16'
Date: Tue, 18 Sep 2012 17:08:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D54619

             Bug #: 54619
           Summary: GCC aborts during compilation with '-O2 -mips16'
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: sje@gcc.gnu.org
            Target: mips*-*-*


I am getting a Floating point exception from the compiler while compiling t=
he
following small test program with -O2 -mips16.  I can reproduce it while us=
ing
a native or cross compiler targeting mips and while generating code for big=
 or
little endian.  I could also reproduce it on targets for linux and for elf.

% cat q.c
swapfunc(char *a , char *b , int n , int swaptype)
{
    long i =3D (n) / sizeof (char);
    char *pi =3D (char *) (a);
    char *pj =3D (char *) (b);
    do {
      *pi++ =3D *pj;
    } while (--i > 0);
}
qsort(void *a)
{
 char *pb;
 int r;
 int swaptype;
 swapfunc(a, pb - r, r, swaptype);
}


% obj*/gcc/initial/gcc/cc1 -quiet -mel -O2 -mips16 q.c
q.c: In function =E2=80=98qsort=E2=80=99:
q.c:10:1: internal compiler error: Floating point exception
 qsort(void *a)
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


% obj*/gcc/gcc/cc1 -version
GNU C (GCC) version 4.8.0 20120913 (experimental) (mipsel-unknown-linux-gnu)
    compiled by GNU C version 4.8.0 20120913 (experimental), GMP version 4.=
3.2,
MPFR version 3.0.0-p3, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=3D30 --param ggc-min-heapsize=3D4096