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[LLVM] List all instructions that are !unpredictable #113502

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[LLVM] List all instructions that are !unpredictable #113502

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15 changes: 9 additions & 6 deletions llvm/docs/LangRef.rst
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Expand Up @@ -7154,12 +7154,15 @@ 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``` 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. This is treated as a boolean value:
Any instruction it is attached to signals it is completely unpredictable.

``!unpredictable`` may be attached to, and will affect, these instructions:
* branch
* select
* switch

.. _md_dereferenceable:

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