Remove is_stateful flag from tydesc. Closes #136

Author: brson

src/comp/back/abi.rs

@@ -41,7 +41,7 @@ const tydesc_field_free_glue: int = 5;
 const tydesc_field_unused: int = 6;
 const tydesc_field_sever_glue: int = 7;
 const tydesc_field_mark_glue: int = 8;
-const tydesc_field_is_stateful: int = 9;
+const tydesc_field_unused2: int = 9;
 const tydesc_field_cmp_glue: int = 10;
 const tydesc_field_shape: int = 11;
 const tydesc_field_shape_tables: int = 12;

src/comp/middle/trans.rs

@@ -1275,7 +1275,7 @@ fn emit_tydescs(ccx: @crate_ctxt) {
                             C_null(T_ptr(T_i8())), // unused
                             C_null(glue_fn_ty), // sever_glue
                             C_null(glue_fn_ty), // mark_glue
-                            C_null(glue_fn_ty), // is_stateful
+                            C_null(glue_fn_ty), // unused
                             cmp_glue, // cmp_glue
                             C_shape(ccx, shape), // shape
                             shape_tables, // shape_tables

src/rt/rust_builtin.cpp

@@ -201,8 +201,8 @@ static void
 debug_tydesc_helper(rust_task *task, type_desc *t)
 {
     LOG(task, stdlib, "  size %" PRIdPTR ", align %" PRIdPTR
-        ", stateful %" PRIdPTR ", first_param 0x%" PRIxPTR,
-        t->size, t->align, t->is_stateful, t->first_param);
+        ", first_param 0x%" PRIxPTR,
+        t->size, t->align, t->first_param);
 }
 
 extern "C" CDECL void

src/rt/rust_crate_cache.cpp

@@ -38,8 +38,6 @@ rust_crate_cache::get_type_desc(size_t size,
                  "rust_crate_cache::descs[%" PRIdPTR "] = 0x%" PRIxPTR,
                  i, descs[i]);
         td->descs[i] = descs[i];
-        // FIXME (issue #136):  Below is a miscalculation.
-        td->is_stateful |= descs[i]->is_stateful;
     }
     td->n_obj_params = n_obj_params;
     td->n_params = n_descs - 1;

src/rt/rust_internal.h

@@ -274,7 +274,7 @@ struct type_desc {
     void *unused;
     glue_fn *sever_glue;    // For GC.
     glue_fn *mark_glue;     // For GC.
-    uintptr_t is_stateful;
+    uintptr_t unused2;
     cmp_glue_fn *cmp_glue;
     const uint8_t *shape;
     const rust_shape_tables *shape_tables;