[llvm] Add llvm.looptrap intrinsic. (PR #181299)

[Florian Mayer via llvm-commits]

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@@ -32294,3 +32294,25 @@ itself. Specifically, the first byte of the instruction will be between
 0x70 and 0x7F, and the second byte will be 0xFE.
 
 There are currently no guarantees about instructions used by other backends.
+
+'``llvm.looptrap``' Intrinsic
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Syntax:
+"""""""
+
+::
+
+      declare void @llvm.looptrap() cold noreturn nounwind
+
+Overview:
+"""""""""
+
+The '``llvm.looptrap``' intrinsic is equivalent to
+``llvm.cond.loop(true)``. Its main raison d'être is that it is also
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fmayer wrote:

I would err towards not putting unicode here, but up to you.

https://github.com/llvm/llvm-project/pull/181299