ZJIT: Annotate BasicObject#initialize (ruby#14590)

It's a no-op and always returns `nil`.

Fixes Shopify#755

Author: tekknolagi

zjit/src/cruby_methods.rs

@@ -177,6 +177,7 @@ pub fn init() -> Annotations {
     annotate!(rb_mKernel, "nil?", types::FalseClass, no_gc, leaf, elidable);
     annotate!(rb_cBasicObject, "==", types::BoolExact, no_gc, leaf, elidable);
     annotate!(rb_cBasicObject, "!", types::BoolExact, no_gc, leaf, elidable);
+    annotate!(rb_cBasicObject, "initialize", types::NilClass, no_gc, leaf, elidable);
 
     annotate_builtin!(rb_mKernel, "Float", types::Float);
     annotate_builtin!(rb_mKernel, "Integer", types::Integer);

zjit/src/hir.rs

@@ -8121,7 +8121,8 @@ mod opt_tests {
           v6:NilClass = Const Value(nil)
           PatchPoint MethodRedefined(C@0x1008, new@0x1010, cme:0x1018)
           v37:HeapObject[class_exact:C] = ObjectAllocClass VALUE(0x1008)
-          v12:BasicObject = SendWithoutBlock v37, :initialize
+          PatchPoint MethodRedefined(C@0x1008, initialize@0x1040, cme:0x1048)
+          v39:NilClass = CCall initialize@0x1070, v37
           CheckInterrupts
           CheckInterrupts
           Return v37