reload.c (reg_overlap_mentioned_for_reload_p): Handle subregs of mems.

* reload.c (reg_overlap_mentioned_for_reload_p): Handle subregs of
mems.

From-SVN: r109792

gcc/ChangeLog

+2006-01-16  DJ Delorie  <dj@redhat.com>
+
+	* reload.c (reg_overlap_mentioned_for_reload_p): Handle subregs of
+	mems.
+
 2006-01-16  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* pa.md: Disparage copies between general and floating-point registers
@@ -31,7 +36,7 @@
 	* basic-block.h: Remove the prototype for
 	partition_hot_cold_basic_blocks.
 
-2006-01-16  Rafael Ávila de Espíndola <rafael.espindola@gmail.com>
+2006-01-16  Rafael Ávila de EspÁndola <rafael.espindola@gmail.com>
 
 	* cppspec.c (lang_specific_spec_functions): remove
 	* gcc.c (lookup_spec_function): use static_spec_functions directelly

gcc/reload.c

@@ -6329,6 +6329,8 @@ reg_overlap_mentioned_for_reload_p (rtx x, rtx in)
   /* If either argument is a constant, then modifying X can not affect IN.  */
   if (CONSTANT_P (x) || CONSTANT_P (in))
     return 0;
+  else if (GET_CODE (x) == SUBREG && GET_CODE (SUBREG_REG (x)) == MEM)
+    return refers_to_mem_for_reload_p (in);
   else if (GET_CODE (x) == SUBREG)
     {
       regno = REGNO (SUBREG_REG (x));