caller-save.c: Include rtl-iter.h.

gcc/
	* caller-save.c: Include rtl-iter.h.
	(add_used_regs_1): Delete.
	(add_used_regs): Use FOR_EACH_SUBRTX rather than for_each_rtx
	to iterate over subrtxes.  Assert that any remaining pseudos
	have been spilled.

From-SVN: r214621

gcc/ChangeLog

 2014-08-28  Richard Sandiford  <rdsandiford@googlemail.com>
 
+	* caller-save.c: Include rtl-iter.h.
+	(add_used_regs_1): Delete.
+	(add_used_regs): Use FOR_EACH_SUBRTX rather than for_each_rtx
+	to iterate over subrtxes.  Assert that any remaining pseudos
+	have been spilled.
+
+2014-08-28  Richard Sandiford  <rdsandiford@googlemail.com>
+
 	* bt-load.c: Include rtl-iter.h.
 	(btr_reference_found, find_btr_reference, btr_referenced_p): Delete.
 	(find_btr_use): Move further up file.  Use FOR_EACH_SUBRTX_PTR

gcc/caller-save.c

@@ -37,6 +37,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "addresses.h"
 #include "ggc.h"
 #include "dumpfile.h"
+#include "rtl-iter.h"
 
 #define MOVE_MAX_WORDS (MOVE_MAX / UNITS_PER_WORD)
 
@@ -1336,36 +1337,26 @@ insert_save (struct insn_chain *chain, int before_p, int regno,
   return numregs - 1;
 }
 
-/* A for_each_rtx callback used by add_used_regs.  Add the hard-register
-   equivalent of each REG to regset DATA.  */
-
-static int
-add_used_regs_1 (rtx *loc, void *data)
-{
-  unsigned int regno;
-  regset live;
-  rtx x;
-
-  x = *loc;
-  live = (regset) data;
-  if (REG_P (x))
-    {
-      regno = REGNO (x);
-      if (HARD_REGISTER_NUM_P (regno))
-	bitmap_set_range (live, regno, hard_regno_nregs[regno][GET_MODE (x)]);
-      else
-	regno = reg_renumber[regno];
-    }
-  return 0;
-}
-
 /* A note_uses callback used by insert_one_insn.  Add the hard-register
    equivalent of each REG to regset DATA.  */
 
 static void
 add_used_regs (rtx *loc, void *data)
 {
-  for_each_rtx (loc, add_used_regs_1, data);
+  subrtx_iterator::array_type array;
+  FOR_EACH_SUBRTX (iter, array, *loc, NONCONST)
+    {
+      const_rtx x = *iter;
+      if (REG_P (x))
+	{
+	  unsigned int regno = REGNO (x);
+	  if (HARD_REGISTER_NUM_P (regno))
+	    bitmap_set_range ((regset) data, regno,
+			      hard_regno_nregs[regno][GET_MODE (x)]);
+	  else
+	    gcc_checking_assert (reg_renumber[regno] < 0);
+	}
+    }
 }
 
 /* Emit a new caller-save insn and set the code.  */