2019-07-30  Bernd Edlinger  <bernd.edlinger@hotmail.de>

	PR tree-optimization/91109
	* lra-remat.c (update_scratch_ops): Remove assignment of the
	hard register.

Index: gcc/lra-remat.c
===================================================================
--- gcc/lra-remat.c	(revision 273767)
+++ gcc/lra-remat.c	(working copy)
@@ -1021,7 +1021,6 @@ get_hard_regs (struct lra_insn_reg *reg, int &nreg
 static void
 update_scratch_ops (rtx_insn *remat_insn)
 {
-  int hard_regno;
   lra_insn_recog_data_t id = lra_get_insn_recog_data (remat_insn);
   struct lra_static_insn_data *static_id = id->insn_static_data;
   for (int i = 0; i < static_id->n_operands; i++)
@@ -1032,17 +1031,9 @@ update_scratch_ops (rtx_insn *remat_insn)
       int regno = REGNO (*loc);
       if (! lra_former_scratch_p (regno))
 	continue;
-      hard_regno = reg_renumber[regno];
       *loc = lra_create_new_reg (GET_MODE (*loc), *loc,
 				 lra_get_allocno_class (regno),
 				 "scratch pseudo copy");
-      if (hard_regno >= 0)
-	{
-	  reg_renumber[REGNO (*loc)] = hard_regno;
-	  if (lra_dump_file)
-	    fprintf (lra_dump_file, "	 Assigning the same %d to r%d\n",
-		     REGNO (*loc), hard_regno);
-	}
       lra_register_new_scratch_op (remat_insn, i, id->icode);
     }