nobu	2018-08-23 16:45:39 +0900 (Thu, 23 Aug 2018)

  New Revision: 64517

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64517

  Log:
    compile.c: drop unused array
    
    * compile.c (iseq_peephole_optimize): drop unused dynamic array
      literal, without concatenation.

  Modified files:
    trunk/compile.c
Index: compile.c
===================================================================
--- compile.c	(revision 64516)
+++ compile.c	(revision 64517)
@@ -2942,6 +2942,11 @@ iseq_peephole_optimize(rb_iseq_t *iseq, https://github.com/ruby/ruby/blob/trunk/compile.c#L2942
 	    else if (previ == BIN(newarray) && iseq_pop_newarray(iseq, (INSN*)prev)) {
 		ELEM_REMOVE(&iobj->link);
 	    }
+	    else if (previ == BIN(concatarray)) {
+		INSN *piobj = (INSN *)prev;
+		INSERT_BEFORE_INSN1(piobj, piobj->insn_info.line_no, splatarray, Qfalse);
+		INSN_OF(piobj) = BIN(pop);
+	    }
 	    else if (previ == BIN(concatstrings)) {
 		if (OPERAND_AT(prev, 0) == INT2FIX(1)) {
 		    ELEM_REMOVE(prev);

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