Bug#670164: ICE: Segmentation fault when compiling MPFR's set_f.c

[Vincent Lefevre <vincent@vinc17.net>]

tags 670164 upstream
forwarded 670164 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52639
thanks

Here's a simple testcase:

// /usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/4.8.0/cc1 -fpreprocessed ice-setf.i -march=corei7 -mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mno-abm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-bmi2 -mno-tbm -mno-avx -mno-avx2 -msse4.2 -msse4.1 -mno-lzcnt --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=8192 -mtune=corei7 -quiet -dumpbase ice-setf.i -auxbase ice-setf -O3 -std=gnu99 -o - -frandom-seed=0
# 1 "ice-setf.i"
int a(int *, unsigned long);
int g(unsigned long);
void r(int, long);

int foo(unsigned long sy, int *x, int i)
{
  unsigned long sx = x[0];
  if (sy <= sx)
    {
      unsigned long p = sx * 64;
      int m = 0;
      int tmp = i ? g(sx) : a(&m, sx);
      r(tmp, p);
    }
  return 0;
}

$ gcc-snapshot -O3 -march=native -std=gnu99 -c ice-setf.i
ice-setf.i: In function 'foo':
ice-setf.i:5:5: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.

The ICE is reproducible with -O3, but not with -O2.

I'm trying to submit this upstream, but GCC's bugzilla is currently
down.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)