[llvm] [TableGen] Add support for per-write cycle tunables (PR #125870)

[Jay Foad via llvm-commits]

================
@@ -0,0 +1,41 @@
+// RUN: llvm-tblgen -gen-subtarget -I %p/../../include %s 2>&1 | FileCheck %s
----------------
jayfoad wrote:

File name has a typo "PreWrite" instead of "PerWrite"?

https://github.com/llvm/llvm-project/pull/125870