From bf6e2eb7e7ca144dc8a71d87d36edb0d852519a2 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 23 Aug 2018 07:45:39 +0000
Subject: [PATCH] compile.c: drop unused array

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

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64517 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 compile.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compile.c b/compile.c
index d34376c572..0e7153f6e7 100644
--- a/compile.c
+++ b/compile.c
@@ -2942,6 +2942,11 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
 	    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);