================
@@ -4920,6 +4920,116 @@ If no address spaces names are provided, all address
spaces are fenced.
__builtin_amdgcn_fence(__ATOMIC_SEQ_CST, "workgroup", "local")
__builtin_amdgcn_fence(__ATOMIC_SEQ_CST, "workgroup", "local", "global")
+__builtin_amdgcn_processor_is and __builtin_amdgcn_is_invocable
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+``__builtin_amdgcn_processor_is`` and ``__builtin_amdgcn_is_invocable`` provide
+a functional mechanism for programatically querying:
+
+* the identity of the current target processor;
+* the capability of the current target processor to invoke a particular
builtin.
+
+**Syntax**:
+
+.. code-block:: c
+
+ // When used as the predicate for a control structure
+ bool __builtin_amdgcn_processor_is(const char*);
+ bool __builtin_amdgcn_is_invocable(builtin_name);
+ // Otherwise
+ void __builtin_amdgcn_processor_is(const char*);
+ void __builtin_amdgcn_is_invocable(void);
+
+**Example of use**:
+
+.. code-block:: c++
+
+ if (__builtin_amdgcn_processor_is("gfx1201") ||
+ __builtin_amdgcn_is_invocable(__builtin_amdgcn_s_sleep_var))
+ __builtin_amdgcn_s_sleep_var(x);
+
+ if (!__builtin_amdgcn_processor_is("gfx906"))
+ __builtin_amdgcn_s_wait_event_export_ready();
+ else if (__builtin_amdgcn_processor_is("gfx1010") ||
+ __builtin_amdgcn_processor_is("gfx1101"))
+ __builtin_amdgcn_s_ttracedata_imm(1);
+
+ while (__builtin_amdgcn_processor_is("gfx1101")) *p += x;
+
+ do { *p -= x; } while (__builtin_amdgcn_processor_is("gfx1010"));
----------------
erichkeane wrote:
is the formatting OK on this line? Github is making this look awful weird.
Also-also: This is an infinite loop, right? As you said this is never
evaluated at runtime, the answer would be fixed?
https://github.com/llvm/llvm-project/pull/134016
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