do not compile forwardable iseqs

Author: tenderlove

lib/ruby_vm/rjit/insn_compiler.rb

@@ -1435,6 +1435,10 @@ def send(jit, ctx, asm)
       mid = C.vm_ci_mid(cd.ci)
       calling = build_calling(ci: cd.ci, block_handler: blockiseq)
 
+      if calling.flags & C::VM_CALL_FORWARDING != 0
+        return CantCompile
+      end
+
       # vm_sendish
       cme, comptime_recv_klass = jit_search_method(jit, ctx, asm, mid, calling)
       if cme == CantCompile
@@ -4622,6 +4626,11 @@ def jit_call_iseq(jit, ctx, asm, cme, calling, iseq, frame_type: nil, prev_ep: n
         end
       end
 
+      # Don't compile forwardable iseqs
+      if iseq.body.param.flags.forwardable
+        return CantCompile
+      end
+
       # We will not have CantCompile from here.
 
       if block_arg

rjit_c.rb

@@ -420,6 +420,7 @@ def rb_iseqw_to_iseq(iseqw)
   C::VM_CALL_ARGS_BLOCKARG = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_ARGS_BLOCKARG) }
   C::VM_CALL_ARGS_SPLAT = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_ARGS_SPLAT) }
   C::VM_CALL_FCALL = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_FCALL) }
+  C::VM_CALL_FORWARDING = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_FORWARDING) }
   C::VM_CALL_KWARG = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_KWARG) }
   C::VM_CALL_KW_SPLAT = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_KW_SPLAT) }
   C::VM_CALL_KW_SPLAT_MUT = Primitive.cexpr! %q{ SIZET2NUM(VM_CALL_KW_SPLAT_MUT) }
@@ -1094,7 +1095,7 @@ def C.rb_iseq_constant_body
           anon_rest: [CType::BitField.new(1, 2), 10],
           anon_kwrest: [CType::BitField.new(1, 3), 11],
           use_block: [CType::BitField.new(1, 4), 12],
-          forwardable: [CType::BitField.new(1, 4), 13],
+          forwardable: [CType::BitField.new(1, 5), 13],
         ), Primitive.cexpr!("OFFSETOF(((struct rb_iseq_constant_body *)NULL)->param, flags)")],
         size: [CType::Immediate.parse("unsigned int"), Primitive.cexpr!("OFFSETOF(((struct rb_iseq_constant_body *)NULL)->param, size)")],
         lead_num: [CType::Immediate.parse("int"), Primitive.cexpr!("OFFSETOF(((struct rb_iseq_constant_body *)NULL)->param, lead_num)")],

tool/rjit/bindgen.rb

@@ -447,6 +447,7 @@ def push_target(target)
       VM_CALL_ARGS_BLOCKARG
       VM_CALL_ARGS_SPLAT
       VM_CALL_FCALL
+      VM_CALL_FORWARDING
       VM_CALL_KWARG
       VM_CALL_KW_SPLAT
       VM_CALL_KW_SPLAT_MUT