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[DOC][GlobalIsel] Add description for G_FREEZE #156707

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Merged
sunshaoce merged 1 commit into from
Sep 4, 2025
Merged

[DOC][GlobalIsel] Add description for G_FREEZE #156707

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9 changes: 9 additions & 0 deletions llvm/docs/GlobalISel/GenericOpcode.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1150,6 +1150,15 @@ An alignment value of `0` or `1` means no specific alignment.

%8:_(p0) = G_DYN_STACKALLOC %7(s64), 32

G_FREEZE
^^^^^^^^

G_FREEZE is used to stop propagation of undef and poison values.

.. code-block:: none

%1:_(s32) = G_FREEZE %0(s32)

Optimization Hints
------------------

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