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authorJean Boussier <jean.boussier@gmail.com>2025-08-28 19:29:46 +0200
committerJean Boussier <jean.boussier@gmail.com>2025-08-29 00:02:29 +0200
commitb6d4882c05d64aa6cb5ff8761584ae910de67f21 (patch)
treeadf5ec7b381d85182c1a2a5a8d2d2d800d1e8ab7 /shape.h
parentb1dbcd3ce3cb61f7b136f4b1e1bb97a6f3635c3e (diff)
YJIT: getinstancevariable cache indexes for types other than T_OBJECT
While accessing the ivars of other types is too complicated to realistically generate the ASM for it, we can at least provide the ivar index as to not have to lookup the shape tree every time. ``` compare-ruby: ruby 3.5.0dev (2025-08-27T14:58:58Z merge-vm-setivar-d.. 5b749d8e53) +YJIT +PRISM [arm64-darwin24] built-ruby: ruby 3.5.0dev (2025-08-28T17:58:32Z yjit-get-exivar efaa8c9b09) +YJIT +PRISM [arm64-darwin24] | |compare-ruby|built-ruby| |:--------------------------|-----------:|---------:| |vm_ivar_get_on_obj | 930.458| 936.865| | | -| 1.01x| |vm_ivar_get_on_class | 134.471| 431.622| | | -| 3.21x| |vm_ivar_get_on_generic | 146.679| 284.408| | | -| 1.94x| ``` Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org>
Diffstat (limited to 'shape.h')
-rw-r--r--shape.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/shape.h b/shape.h
index 1f444c545f..fdc2b3ddd6 100644
--- a/shape.h
+++ b/shape.h
@@ -24,6 +24,7 @@ STATIC_ASSERT(shape_id_num_bits, SHAPE_ID_NUM_BITS == sizeof(shape_id_t) * CHAR_
// index in rb_shape_tree.shape_list. Allow to access `rb_shape_t *`.
// 19-21 SHAPE_ID_HEAP_INDEX_MASK
// index in rb_shape_tree.capacities. Allow to access slot size.
+// Always 0 except for T_OBJECT.
// 22 SHAPE_ID_FL_FROZEN
// Whether the object is frozen or not.
// 23 SHAPE_ID_FL_HAS_OBJECT_ID