Free variable local allocs at block ends.

 * config/microblaze/microblaze.md (save_stack_block): Define.
   (restore_stack_block): Likewise.

From-SVN: r196110

gcc/ChangeLog

+2013-02-17  Edgar E. Iglesias  <edgar.iglesias@gmail.com>
+
+	* config/microblaze/microblaze.md (save_stack_block): Define.
+	(restore_stack_block): Likewise.
+
 2013-02-16  Edgar E. Iglesias  <edgar.iglesias@gmail.com>
 
 	* config/microblaze/linux.h (TARGET_SUPPORTS_PIC): Define as 1.

gcc/config/microblaze/microblaze.md

@@ -1860,6 +1860,32 @@
   }
 )
 
+(define_expand "save_stack_block"
+  [(match_operand 0 "register_operand" "")
+   (match_operand 1 "register_operand" "")]
+  ""
+  {
+    emit_move_insn (operands[0], operands[1]);
+    DONE;
+  }
+)
+
+(define_expand "restore_stack_block"
+  [(match_operand 0 "register_operand" "")
+   (match_operand 1 "register_operand" "")]
+  ""
+  {
+    rtx retaddr = gen_rtx_MEM (Pmode, stack_pointer_rtx);
+    rtx rtmp    = gen_rtx_REG (SImode, R_TMP);
+
+    /* Move the retaddr.  */
+    emit_move_insn (rtmp, retaddr);
+    emit_move_insn (operands[0], operands[1]);
+    emit_move_insn (gen_rtx_MEM (Pmode, operands[0]), rtmp);
+    DONE;
+  }
+)
+
 ;; Trivial return.  Make it look like a normal return insn as that
 ;; allows jump optimizations to work better .
 (define_expand "return"