re PR target/58854 ("sub sp, fp, #40" hoisted above frame accesses)

Fix PR target/58854

2013-10-30  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/58854
	* config/arm/arm.c (arm_expand_epilogue_apcs_frame): Emit blockage.

From-SVN: r204203

gcc/ChangeLog

+2013-10-30  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	PR target/58854
+	* config/arm/arm.c (arm_expand_epilogue_apcs_frame): Emit blockage.
+
 2013-10-30  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* tree-core.h (tree_index): Add TI_POINTER_BOUNDS_TYPE.

gcc/config/arm/arm.c

@@ -26547,6 +26547,7 @@ arm_expand_epilogue_apcs_frame (bool really_return)
   num_regs = bit_count (saved_regs_mask);
   if ((offsets->outgoing_args != (1 + num_regs)) || cfun->calls_alloca)
     {
+      emit_insn (gen_blockage ());
       /* Unwind the stack to just below the saved registers.  */
       emit_insn (gen_addsi3 (stack_pointer_rtx,
                              hard_frame_pointer_rtx,