[Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16'

[sje at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619

             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: unassig...@gcc.gnu.org
        ReportedBy: s...@gcc.gnu.org
            Target: mips*-*-*


I am getting a Floating point exception from the compiler while compiling the
following small test program with -O2 -mips16.  I can reproduce it while using
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 = (n) / sizeof (char);
    char *pi = (char *) (a);
    char *pj = (char *) (b);
    do {
      *pi++ = *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 ‘qsort’:
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=30 --param ggc-min-heapsize=4096