Initialize shape attr index also in non-markable CC

vm_callinfo.h

@@ -301,12 +301,12 @@ extern const struct rb_callcache *rb_vm_empty_cc_for_super(void);
 
 #define vm_cc_empty() rb_vm_empty_cc()
 
+static inline void vm_cc_attr_index_set(const struct rb_callcache *cc, attr_index_t index, shape_id_t dest_shape_id);
+
 static inline void
 vm_cc_attr_index_initialize(const struct rb_callcache *cc, shape_id_t shape_id)
 {
-    VM_ASSERT(IMEMO_TYPE_P(cc, imemo_callcache));
-    VM_ASSERT(cc != vm_cc_empty());
-    *(uintptr_t *)&cc->aux_.attr.value = (uintptr_t)(shape_id) << SHAPE_FLAG_SHIFT;
+    vm_cc_attr_index_set(cc, (attr_index_t)-1, shape_id);
 }
 
 static inline const struct rb_callcache *
@@ -385,7 +385,6 @@ vm_cc_attr_index_dest_shape_id(const struct rb_callcache *cc)
 static inline void
 vm_cc_atomic_shape_and_index(const struct rb_callcache *cc, shape_id_t * shape_id, attr_index_t * index)
 {
-    VM_ASSERT(vm_cc_markable(cc));
     uintptr_t cache_value = cc->aux_.attr.value; // Atomically read 64 bits
     *shape_id = (shape_id_t)(cache_value >> SHAPE_FLAG_SHIFT);
     *index = (attr_index_t)(cache_value & SHAPE_FLAG_MASK) - 1;
@@ -451,9 +450,14 @@ vm_cc_call_set(const struct rb_callcache *cc, vm_call_handler call)
 static inline void
 vm_cc_attr_index_set(const struct rb_callcache *cc, attr_index_t index, shape_id_t dest_shape_id)
 {
+    uintptr_t *attr_value = (uintptr_t *)&cc->aux_.attr.value;
+    if (!vm_cc_markable(cc)) {
+        *attr_value = (uintptr_t)INVALID_SHAPE_ID << SHAPE_FLAG_SHIFT;
+        return;
+    }
     VM_ASSERT(IMEMO_TYPE_P(cc, imemo_callcache));
     VM_ASSERT(cc != vm_cc_empty());
-    *(uintptr_t *)&cc->aux_.attr.value = (index + 1) | ((uintptr_t)(dest_shape_id) << SHAPE_FLAG_SHIFT);
+    *attr_value = (index + 1) | ((uintptr_t)(dest_shape_id) << SHAPE_FLAG_SHIFT);
 }
 
 static inline void

vm_insnhelper.c

@@ -1096,10 +1096,8 @@ static inline void
 fill_ivar_cache(const rb_iseq_t *iseq, IVC ic, const struct rb_callcache *cc, int is_attr, attr_index_t index, shape_id_t shape_id)
 {
     if (is_attr) {
-        if (vm_cc_markable(cc)) {
         vm_cc_attr_index_set(cc, index, shape_id);
     }
-    }
     else {
         vm_ic_attr_index_set(iseq, ic, index, shape_id);
     }
@@ -1161,14 +1159,8 @@ vm_getivar(VALUE obj, ID id, const rb_iseq_t *iseq, IVC ic, const struct rb_call
     attr_index_t index;
 
     if (is_attr) {
-        if (vm_cc_markable(cc)) {
         vm_cc_atomic_shape_and_index(cc, &cached_id, &index);
     }
-        else {
-            cached_id = INVALID_SHAPE_ID;
-            index = ATTR_INDEX_NOT_SET;
-        }
-    }
     else {
         vm_ic_atomic_shape_and_index(ic, &cached_id, &index);
     }
@@ -1214,10 +1206,8 @@ vm_getivar(VALUE obj, ID id, const rb_iseq_t *iseq, IVC ic, const struct rb_call
         }
         else {
             if (is_attr) {
-                if (vm_cc_markable(cc)) {
                 vm_cc_attr_index_initialize(cc, shape_id);
             }
-            }
             else {
                 vm_ic_attr_index_initialize(ic, shape_id);
             }
@@ -1248,10 +1238,8 @@ populate_cache(attr_index_t index, shape_id_t next_shape_id, ID id, const rb_ise
 {
     // Cache population code
     if (is_attr) {
-        if (vm_cc_markable(cc)) {
         vm_cc_attr_index_set(cc, index, next_shape_id);
     }
-    }
     else {
         vm_ic_attr_index_set(iseq, ic, index, next_shape_id);
     }
@@ -3927,9 +3915,7 @@ vm_call_method_each_type(rb_execution_context_t *ec, rb_control_frame_t *cfp, st
         CALLER_SETUP_ARG(cfp, calling, ci);
         CALLER_REMOVE_EMPTY_KW_SPLAT(cfp, calling, ci);
         rb_check_arity(calling->argc, 0, 0);
-        if (vm_cc_markable(cc)) {
         vm_cc_attr_index_initialize(cc, INVALID_SHAPE_ID);
-        }
         const unsigned int ivar_mask = (VM_CALL_ARGS_SPLAT | VM_CALL_KW_SPLAT);
         VM_CALL_METHOD_ATTR(v,
                             vm_call_ivar(ec, cfp, calling),