optimization/7130: miscompiled code for gcc-3.1 in powerpc linux with -funroll-all-loops

[Alan Modra]

	`Alan Modra' made changes to this PR.

--- /tmp/gnats19046Obd	2002-07-11 15:57:53.000000000 +0930
+++ /tmp/gnats1904615v	2002-07-11 16:01:04.000000000 +0930
@@ -18,7 +18,7 @@
 >Severity:       serious
 >Priority:       high
 >Responsible:    unassigned
->State:          open
+>State:          analyzed
 >Class:          wrong-code
 >Submitter-Id:   net
 >Arrival-Date:   Tue Jun 25 18:16:02 PDT 2002

This is a doloop.c error.  -fno-branch-count-reg also avoids the error.