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avoid 8 words of allocation per lambda, whoooo

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* libguile/objcodes.c (scm_bytecode_to_objcode): Check that the length of
  the vector matches the length embedded in the bytecode.

* libguile/programs.c (scm_program_meta): Call through to
  scm_objcode_meta, instead of looking in the object table. Avoids
  consing up a program+objcode slice for the meta until the meta is
  actually called.

* libguile/vm-i-loader.c (load-program): Step past the metadata too.

* module/language/glil/compile-assembly.scm (make-meta): Just return the
  load-program form, or #f.
  (assoc-ref-or-acons, object-index-and-alist, make-object-table): Don't
  write the meta into the object table.
  (glil->assembly): Instead write the meta into the load-program form.
This commit is contained in:
Andy Wingo 2009-02-01 10:50:45 +01:00
parent 1f1ec13b5c
commit ac47d5f639
4 changed files with 29 additions and 29 deletions
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9
libguile/objcodes.c
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@ -190,14 +190,17 @@ SCM_DEFINE (scm_bytecode_to_objcode, "bytecode->objcode", 1, 0, 0,
data = (struct scm_objcode*)c_bytecode;
SCM_NEWSMOB2 (objcode, scm_tc16_objcode, data, bytecode);
scm_array_handle_release (&handle);
SCM_ASSERT_RANGE (0, bytecode, size >= sizeof(struct scm_objcode));
if (data->len + data->metalen != (size - sizeof (*data)))
scm_misc_error (FUNC_NAME, "bad u8vector size (~a != ~a)",
SCM_LIST2 (scm_from_size_t (size),
scm_from_uint32 (sizeof (*data) + data->len + data->metalen)));
assert (increment == 1);
SCM_ASSERT_RANGE (0, bytecode, size < 1<<31);
SCM_ASSERT_RANGE (0, bytecode, size >= sizeof(*data));
SCM_SET_SMOB_FLAGS (objcode, SCM_F_OBJCODE_IS_U8VECTOR);
/* foolishly, we assume that as long as bytecode is around, that c_bytecode
will be of the same length; perhaps a bad assumption? */
/* FIXME: check length of bytecode */
return objcode;
}