[MIPS] RFA: Use new rtl iterators in mips_sim_wait_regs_1

[MIPS] RFA: Use new rtl iterators in mips_sim_wait_regs_1

[Richard Sandiford]

This is part of a series to remove uses of for_each_rtx from the ports.

Tested by making sure there were no code changes for gcc.dg, gcc.c-torture
and g++.dg for mips64-elf.  OK to install?

Thanks,
Richard


gcc/
	* config/mips/mips.c (mips_sim_insn): Update comment.
	(mips_sim_wait_regs_2): Delete.
	(mips_sim_wait_regs_1): Use FOR_EACH_SUBRTX_VAR.

Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c	2014-10-25 09:51:21.129845072 +0100
+++ gcc/config/mips/mips.c	2014-10-25 09:51:21.522848575 +0100
@@ -15468,7 +15468,7 @@ mips_annotate_pic_calls (void)
     }
 }
 \f
-/* A temporary variable used by for_each_rtx callbacks, etc.  */
+/* A temporary variable used by note_uses callbacks, etc.  */
 static rtx_insn *mips_sim_insn;
 
 /* A structure representing the state of the processor pipeline.
@@ -15562,23 +15562,16 @@ mips_sim_wait_reg (struct mips_sim *stat
     }
 }
 
-/* A for_each_rtx callback.  If *X is a register, advance simulation state
-   DATA until mips_sim_insn can read the register's value.  */
-
-static int
-mips_sim_wait_regs_2 (rtx *x, void *data)
-{
-  if (REG_P (*x))
-    mips_sim_wait_reg ((struct mips_sim *) data, mips_sim_insn, *x);
-  return 0;
-}
-
-/* Call mips_sim_wait_regs_2 (R, DATA) for each register R mentioned in *X.  */
+/* A note_uses callback.  For each register in *X, advance simulation
+   state DATA until mips_sim_insn can read the register's value.  */
 
 static void
 mips_sim_wait_regs_1 (rtx *x, void *data)
 {
-  for_each_rtx (x, mips_sim_wait_regs_2, data);
+  subrtx_var_iterator::array_type array;
+  FOR_EACH_SUBRTX_VAR (iter, array, *x, NONCONST)
+    if (REG_P (*iter))
+      mips_sim_wait_reg ((struct mips_sim *) data, mips_sim_insn, *iter);
 }
 
 /* Advance simulation state STATE until all of INSN's register

RE: [MIPS] RFA: Use new rtl iterators in mips_sim_wait_regs_1

[Matthew Fortune]

> gcc/
> 	* config/mips/mips.c (mips_sim_insn): Update comment.
> 	(mips_sim_wait_regs_2): Delete.
> 	(mips_sim_wait_regs_1): Use FOR_EACH_SUBRTX_VAR.

OK