x86 regex.c failure from Jim Meyering.

	* compile/980329-1.c: New test.

From-SVN: r18975

gcc/testsuite/gcc.c-torture/ChangeLog

+Fri Apr  3 12:27:49 1998  Jim Wilson  <wilson@cygnus.com>
+
+	* compile/980329-1.c: New test.
 
 Mon Feb 23 15:16:53 1998  Robert Lipe <robertl@dgii.com>
 	From Bruno Haible <haible@ilog.fr>:

gcc/testsuite/gcc.c-torture/compile/980329-1.c

+typedef unsigned long int size_t;
+struct re_pattern_buffer
+  {
+    unsigned char *buffer;
+    unsigned long int used;
+  };
+struct re_registers
+  {
+    int *start;
+  };
+
+static const char **regstart, **regend;
+static const char **old_regend;
+
+static int
+re_match_2_internal (struct re_pattern_buffer *bufp,
+		     struct re_registers *regs)
+{
+  unsigned char *p = bufp->buffer;
+  unsigned char *pend = p + bufp->used;
+
+  for (;;)
+    {
+      int highest_active_reg = 1;
+      if (bufp)
+	{
+	  int i;
+	  for (i = 1;; i++)
+	    regs->start[i] = 0;
+	}
+
+      switch ((unsigned int) *p++)
+	{
+	case 1:
+	  {
+	    unsigned char r = *p;
+	    if (r)
+	      highest_active_reg = r;
+	  }
+	  if (p + 2 == pend)
+	    {
+	      char is_a_jump_n = 0;
+	      int mcnt = 0;
+	      unsigned char *p1;
+
+	      p1 = p + 2;
+	      switch (*p1++)
+		{
+		case 2:
+		  is_a_jump_n = 1;
+		case 1:
+		  do { do { mcnt = *p1; } while (0); p1 += 2; } while (0);
+		  if (is_a_jump_n)
+		    p1 = 0;
+		}
+
+	      if (mcnt && *p1 == 0)
+		{
+		  unsigned r;
+		  for (r = 0; r < (unsigned) *p + (unsigned) *(p + 1); r++)
+		    {
+		      if (regend[0] >= regstart[r])
+			regend[r] = old_regend[r];
+		    }
+		  do { while (0 < highest_active_reg + 1) { } } while (0);
+		}
+	    }
+	}
+    }
+
+  return -1;
+}