re PR target/15927 (THUMB -O2: strength-reduced iteration variable ends up off by 1)

PR target/15927
* arm.h (THUMB_SECONDARY_OUTPUT_RELOAD_CLASS): Don't need a secondary
reload if CLASS is BASE_REGS.

From-SVN: r83548

gcc/ChangeLog

+2004-06-23  Richard Earnshaw  <rearnsha@arm.com>
+
+	PR target/15927
+	* arm.h (THUMB_SECONDARY_OUTPUT_RELOAD_CLASS): Don't need a secondary
+	reload if CLASS is BASE_REGS.
+
 2004-06-23  Richard Sandiford  <rsandifo@redhat.com>
 
 	* gengtype-yacc.y (option): Avoid use of non-constant struct

gcc/config/arm/arm.h

@@ -1322,7 +1322,7 @@ enum reg_class
    : NO_REGS)
 
 #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X)		\
-  ((CLASS) != LO_REGS				 			\
+  ((CLASS) != LO_REGS && (CLASS) != BASE_REGS				\
    ? ((true_regnum (X) == -1 ? LO_REGS					\
        : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS	\
        : NO_REGS)) 							\