Revert r245598

gcc/
	PR target/78660
	Revert:
	2017-02-20  Matthew Fortune  <matthew.fortune@imgtec.com>

	* lra-constraints.c (curr_insn_transform): Handle
	WORD_REGISTER_OPERATIONS requirements when reloading SUBREGs.

From-SVN: r245626

gcc/ChangeLog

+2017-02-21  Matthew Fortune  <matthew.fortune@imgtec.com>
+
+	PR target/78660
+	Revert:
+	2017-02-20  Matthew Fortune  <matthew.fortune@imgtec.com>
+
+	* lra-constraints.c (curr_insn_transform): Handle
+	WORD_REGISTER_OPERATIONS requirements when reloading SUBREGs.
+
 2017-02-21  Martin Liska  <mliska@suse.cz>
 
 	* config/i386/i386.opt: Replace -masm-dialect with -masm.

gcc/lra-constraints.c

@@ -4131,15 +4131,7 @@ curr_insn_transform (bool check_only_p)
 			  && (goal_alt[i] == NO_REGS
 			      || (simplify_subreg_regno
 				  (ira_class_hard_regs[goal_alt[i]][0],
-				   GET_MODE (reg), byte, mode) >= 0)))
-		      /* WORD_REGISTER_OPERATIONS targets require the register
-			 to be reloaded when the outer mode is strictly
-			 narrower than the inner mode.  Note: It may be
-			 necessary to always reload the inner mode here but it
-			 requires further investigation.  */
-		      || (GET_MODE_PRECISION (mode)
-			  < GET_MODE_PRECISION (GET_MODE (reg))
-			  && WORD_REGISTER_OPERATIONS)))
+				   GET_MODE (reg), byte, mode) >= 0)))))
 		{
 		  /* An OP_INOUT is required when reloading a subreg of a
 		     mode wider than a word to ensure that data beyond the