Handle inline_const_cache=false

lib/syntax_tree/yarv/compiler.rb

@@ -204,6 +204,7 @@ def visit_unsupported(_node)
       # These options mirror the compilation options that we currently support
       # that can be also passed to RubyVM::InstructionSequence.compile.
       attr_reader :frozen_string_literal,
+                  :inline_const_cache,
                   :operands_unification,
                   :specialized_instruction
 
@@ -217,10 +218,12 @@ def visit_unsupported(_node)
 
       def initialize(
         frozen_string_literal: false,
+        inline_const_cache: true,
         operands_unification: true,
         specialized_instruction: true
       )
         @frozen_string_literal = frozen_string_literal
+        @inline_const_cache = inline_const_cache
         @operands_unification = operands_unification
         @specialized_instruction = specialized_instruction
 
@@ -1374,6 +1377,7 @@ def visit_program(node)
             nil,
             node.location,
             frozen_string_literal: frozen_string_literal,
+            inline_const_cache: inline_const_cache,
             operands_unification: operands_unification,
             specialized_instruction: specialized_instruction
           )

lib/syntax_tree/yarv/instruction_sequence.rb

@@ -77,6 +77,7 @@ def change_by(value)
 
       # These are various compilation options provided.
       attr_reader :frozen_string_literal,
+                  :inline_const_cache,
                   :operands_unification,
                   :specialized_instruction
 
@@ -86,6 +87,7 @@ def initialize(
         parent_iseq,
         location,
         frozen_string_literal: false,
+        inline_const_cache: true,
         operands_unification: true,
         specialized_instruction: true
       )
@@ -104,6 +106,7 @@ def initialize(
         @stack = Stack.new
 
         @frozen_string_literal = frozen_string_literal
+        @inline_const_cache = inline_const_cache
         @operands_unification = operands_unification
         @specialized_instruction = specialized_instruction
       end
@@ -192,6 +195,7 @@ def child_iseq(type, name, location)
           self,
           location,
           frozen_string_literal: frozen_string_literal,
+          inline_const_cache: inline_const_cache,
           operands_unification: operands_unification,
           specialized_instruction: specialized_instruction
         )
@@ -434,23 +438,35 @@ def opt_aset_with(object, calldata)
       end
 
       def opt_getconstant_path(names)
-        if RUBY_VERSION < "3.2"
-          cache = inline_storage
-          getinlinecache = opt_getinlinecache(-1, cache)
-
-          if names[0] == :""
+        if RUBY_VERSION < "3.2" || !inline_const_cache
+          cache = nil
+          getinlinecache = nil
+
+          if inline_const_cache
+            cache = inline_storage
+            getinlinecache = opt_getinlinecache(-1, cache)
+
+            if names[0] == :""
+              names.shift
+              pop
+              putobject(Object)
+            end
+          elsif names[0] == :""
             names.shift
-            pop
             putobject(Object)
+          else
+            putnil
           end
 
           names.each_with_index do |name, index|
             putobject(index == 0)
             getconstant(name)
           end
 
-          opt_setinlinecache(cache)
-          getinlinecache.patch!(self)
+          if inline_const_cache
+            opt_setinlinecache(cache)
+            getinlinecache.patch!(self)
+          end
         else
           push(OptGetConstantPath.new(names))
         end

test/compiler_test.rb

@@ -432,6 +432,7 @@ class CompilerTest < Minitest::Test
       { frozen_string_literal: true },
       { operands_unification: false },
       { specialized_instruction: false },
+      { inline_const_cache: false },
       { operands_unification: false, specialized_instruction: false }
     ]