rs6000: Rename insn_chain_scanned_p to spe_insn_chain_scanned_p

This makes it clearer this field is only for SPE.


	* config/rs6000/rs6000.c (machine_function): Rename
	insn_chain_scanned_p to spe_insn_chain_scanned_p.
	(rs6000_stack_info): Adjust.

From-SVN: r235588

gcc/ChangeLog

+2016-04-28  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000.c (machine_function): Rename
+	insn_chain_scanned_p to spe_insn_chain_scanned_p.
+	(rs6000_stack_info): Adjust.
+
 2016-04-28  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* config/arc/constraints.md (Usd): Convert to define_constraint.

gcc/config/rs6000/rs6000.c

@@ -130,7 +130,7 @@ typedef struct rs6000_stack {
 typedef struct GTY(()) machine_function
 {
   /* Whether the instruction chain has been scanned already.  */
-  int insn_chain_scanned_p;
+  int spe_insn_chain_scanned_p;
   /* Flags if __builtin_return_address (n) with n >= 1 was used.  */
   int ra_needs_full_frame;
   /* Flags if __builtin_return_address (0) was used.  */
@@ -23468,10 +23468,10 @@ rs6000_stack_info (void)
   if (TARGET_SPE)
     {
       /* Cache value so we don't rescan instruction chain over and over.  */
-      if (cfun->machine->insn_chain_scanned_p == 0)
-	cfun->machine->insn_chain_scanned_p
+      if (cfun->machine->spe_insn_chain_scanned_p == 0)
+	cfun->machine->spe_insn_chain_scanned_p
 	  = spe_func_has_64bit_regs_p () + 1;
-      info_ptr->spe_64bit_regs_used = cfun->machine->insn_chain_scanned_p - 1;
+      info_ptr->spe_64bit_regs_used = cfun->machine->spe_insn_chain_scanned_p - 1;
     }
 
   /* Select which calling sequence.  */