[Bug target/49600] Bad SSE2 int->float split in i386.md

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49600

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-07-04 13:42:00 UTC ---
Here is the testcase:

---
 long int seedi;
  long lo;
 double ran() {
  long hi;
  long test;
  hi = seedi / 127773L;
  test = 16807L * lo - 2836L * hi;
  if (test > 0) {
   seedi = test;
  }
  return ( (float) seedi / 2147483647L);
 }
---

It failed at -O3 -funroll-loops -msse2 -mfpmath=sse -ffast-math -mtune=XXX,
where XXX is a new x86 optimization we are working on.