[PMC] Modified PMC initializations to avoid unnecessary use of

mem_allocate_zeroed_* functions, as they're slightly more expensive than
non-zeroed allocations -- especially as these initializers immediately
overwrite allocated memory.

git-svn-id: https://svn.parrot.org/parrot/trunk@38822 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

src/pmc/fixedpmcarray.pmc

@@ -373,7 +373,7 @@ array.
             return;
 
         PMC_size(SELF) = size;
-        data           = mem_allocate_n_zeroed_typed(size, PMC *);
+        data           = mem_allocate_n_typed(size, PMC *);
 
         for (i = 0; i < size; i++)
             data[i] = PMCNULL;

src/pmc/namespace.pmc

@@ -148,7 +148,6 @@ Initialize a C<NameSpace> PMC.
                 mem_allocate_zeroed_typed(Parrot_NameSpace_attributes);
         PARROT_NAMESPACE(SELF)->vtable = PMCNULL;
         PARROT_NAMESPACE(SELF)->_class = PMCNULL;
-        PARROT_NAMESPACE(SELF)->_class = PMCNULL;
         SELF.set_pointer(parrot_new_hash(INTERP));
         PObj_custom_mark_destroy_SETALL(SELF);
     }

src/pmc/nci.pmc

@@ -25,7 +25,7 @@ void pcc_params(PARROT_INTERP, STRING *sig, Parrot_NCI_attributes * const nci_in
 void pcc_params(PARROT_INTERP, STRING *sig, Parrot_NCI_attributes * const nci_info) {
         char   *sig_c      = Parrot_str_to_cstring(interp, sig);
         size_t  sig_length = strlen(sig_c);
-        char   *param_sig  = mem_allocate_n_zeroed_typed(sig_length, char);
+        char   *param_sig  = mem_allocate_n_typed(sig_length, char);
         size_t  j          = 0;
         size_t  i;
 

src/pmc/string.pmc

@@ -34,9 +34,8 @@ Initializes the string.
 */
 
     VTABLE void init() {
-
         Parrot_String_attributes *attrs =
-            mem_allocate_zeroed_typed(Parrot_String_attributes);
+            mem_allocate_typed(Parrot_String_attributes);
 
         attrs->str_val = Parrot_str_new_noinit(INTERP, enum_stringrep_one, 0);
         PMC_data(SELF) = attrs;

src/pmc/unmanagedstruct.pmc

@@ -653,8 +653,8 @@ calc_offsets(PARROT_INTERP, PMC *pmc, PMC *value, size_t toff)
 
 pmclass UnManagedStruct need_ext no_ro {
     ATTR void   *ptr;   /* the struct that this UnManagedStruct isn't managing */
-    ATTR INTVAL  size;  /* the size of the struct */
     ATTR PMC    *init;  /* the initializer used with this UnManagedStruct */
+    ATTR INTVAL  size;  /* the size of the struct */
 
 /*
 
@@ -707,7 +707,9 @@ The offset.
 */
 
     VTABLE void init_pmc(PMC *value) {
-        SELF.init();
+        Parrot_UnManagedStruct_attributes *attrs =
+            mem_allocate_typed(Parrot_UnManagedStruct_attributes);
+        PMC_data(SELF) = attrs;
         SELF.set_pmc(value);
     }