================
@@ -2799,6 +2799,34 @@ counter's true frequency will need to be provided by the
user.
Query for this feature with ``__has_builtin(__builtin_readsteadycounter)``.
+``__builtin_cpu_supports``
+--------------------------
+
+**Syntax**:
+
+.. code-block:: c++
+
+ int __builtin_cpu_supports(const char *features);
+
+**Example of Use:**:
+
+.. code-block:: c++
+
+ if (__builtin_cpu_supports("sve"))
+ sve_code();
+
+**Description**:
+
+The ``__builtin_cpu_supports`` function detects at runtime if target CPU
+supports features specified in string argument. It returns positive integer
+if all features are supported and 0 otherwise. Names of features and format is
+target specific. For example on AArch64 features are combined using ``+`` like
----------------
MaskRay wrote:
Remove: "For example". I believe other targets don't support `+`.
https://github.com/llvm/llvm-project/pull/84098
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