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[LangRef] Clarify that selects can have !unpredictable #162753

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Oct 15, 2025
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[LangRef] Clarify that selects can have !unpredictable #162753

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12 changes: 6 additions & 6 deletions llvm/docs/LangRef.rst
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Expand Up @@ -7517,12 +7517,12 @@ sections that the user does not want removed after linking.
'``unpredictable``' Metadata
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

``unpredictable`` metadata may be attached to any branch or switch
instruction. It can be used to express the unpredictability of control
flow. Similar to the ``llvm.expect`` intrinsic, it may be used to alter
optimizations related to compare and branch instructions. The metadata
is treated as a boolean value; if it exists, it signals that the branch
or switch that it is attached to is completely unpredictable.
``unpredictable`` metadata may be attached to any branch, select, or switch
instruction. It can be used to express the unpredictability of control flow.
Similar to the ``llvm.expect`` intrinsic, it may be used to alter optimizations
related to compare and branch instructions. The metadata is treated as a
boolean value; if it exists, it signals that the branch, select, or switch that
it is attached to is completely unpredictable.

.. _md_dereferenceable:

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