Reduce Array#include? allocations for literals

Author: Strech

compile.c

@@ -4357,7 +4357,9 @@ iseq_specialized_instruction(rb_iseq_t *iseq, INSN *iobj)
         INSN *niobj = (INSN *)iobj->link.next;
         if ((IS_INSN_ID(niobj, getlocal) ||
              IS_INSN_ID(niobj, getinstancevariable) ||
-             IS_INSN_ID(niobj, putself)) &&
+             IS_INSN_ID(niobj, putself) ||
+             IS_INSN_ID(niobj, putobject) ||
+             IS_INSN_ID(niobj, putnil)) &&
             IS_NEXT_INSN_ID(&niobj->link, send)) {
 
             LINK_ELEMENT *sendobj = &(niobj->link); // Below we call ->next;

test/ruby/test_optimization.rb

@@ -1119,6 +1119,13 @@ def test_opt_duparray_send_include_p
       '@c = :b; [:a, :b].include?(@c)',
       '@c = "b"; %i[a b].include?(@c.to_sym)',
       '[:a, :b].include?(self) == false',
+      "[:a, :b].include?(:a)",
+      "[true, false].include?(false)",
+      "[1, nil].include?(nil)",
+      "# frozen_string_literal: true\n['a', 'b'].include?('a')",
+      "# frozen_string_literal: true\n['a', 'b'].include?('c') == false",
+      "# frozen_string_literal: true\n['a', 'b'].include?(2) == false",
+      "# frozen_string_literal: true\n['a', 'b'].include?(/a/) == false",
     ].each do |code|
       iseq = RubyVM::InstructionSequence.compile(code)
       insn = iseq.disasm