[llvm] [Xtensa] Add esp32/esp8266 cpus implementation. (PR #152409)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,7 @@
+; RUN: llc < %s --mtriple=xtensa --mcpu=invalid 2>&1 | FileCheck %s
+
+; CHECK: {{.*}} is not a recognized processor for this target
+
+define void @f() {
+  ret void
+}
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arsenm wrote:

```suggestion
}

```

End of file whitespace error 

https://github.com/llvm/llvm-project/pull/152409