[llvm] [Xtensa] Initial codegen support from IR (PR #78548)

[Andrei Safronov via llvm-commits]

================
@@ -0,0 +1,30 @@
+//===- Xtensa.h - Top-level interface for Xtensa representation -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
----------------
andreisfr wrote:

Thank you very much for comments. I removed these strings from all new files.

https://github.com/llvm/llvm-project/pull/78548