New test; for ia32 codegen bug.

Reported by Daniel Lauer <daniel@informatik.uni-bonn.de>

From-SVN: r32509

gcc/testsuite/gcc.c-torture/execute/20000313-1.c

+unsigned int buggy (unsigned int *param)
+{
+  unsigned int accu, zero = 0, borrow;
+  accu    = - *param;
+  borrow  = - (accu > zero);
+  *param += accu;
+  return borrow;
+}
+
+int main (void)
+{
+  unsigned int param  = 1;
+  unsigned int borrow = buggy (&param);
+
+  if (param != 0)
+    abort ();
+  if (borrow + 1 != 0)
+    abort ();
+  return 0;
+}