[llvm] [IR][LangRef] Add partial reduction add intrinsic (PR #94499)

[Graham Hunter via llvm-commits]

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@@ -14264,7 +14264,7 @@ a buffer LLVM can use to perform counter increments (i.e. the lowering of
 ``llvm.instrprof.increment[.step]``. The address range following the counter
 buffer, ``<num-counters>`` x ``sizeof(ptr)`` - sized, is expected to contain
 pointers to contexts of functions called from this function ("subcontexts").
-LLVM does not dereference into that memory region, just calculates GEPs. 
+LLVM does not dereference into that memory region, just calculates GEPs.
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huntergr-arm wrote:

nit: unrelated whitespace change.

https://github.com/llvm/llvm-project/pull/94499