re PR target/50106 ([ARM] Wrong code with -march=armv5t -mthumb -Os)

2011-10-20  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

       PR target/50106
       * config/arm/arm.c (thumb_unexpanded_epilogue): Handle return
	reg size from 1-3.

From-SVN: r180240

gcc/ChangeLog

+2011-10-20  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>
+
+       PR target/50106
+       * config/arm/arm.c (thumb_unexpanded_epilogue): Handle return
+	reg size from 1-3.
+
 2011-10-20  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-loop-im.c (stmt_cost): Add WIDEN_*, FMA_EXPR

gcc/config/arm/arm.c

@@ -21652,7 +21652,8 @@ thumb_unexpanded_epilogue (void)
   if (extra_pop > 0)
     {
       unsigned long extra_mask = (1 << extra_pop) - 1;
-      live_regs_mask |= extra_mask << (size / UNITS_PER_WORD);
+      live_regs_mask |= extra_mask << ((size + UNITS_PER_WORD - 1) 
+				       / UNITS_PER_WORD);
     }
 
   /* The prolog may have pushed some high registers to use as