[llvm] [Xtensa] Implement Code Density Option. (PR #119639)

[Dániel Buga via llvm-commits]

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@@ -0,0 +1,17 @@
+# RUN: not llvm-mc -triple xtensa --mattr=+density %s 2>&1 | FileCheck %s
+
+LBL0:
+
+# Out of range immediates
+
+# imm1n_15
+addi.n a2, a3, 20
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bugadani wrote:

Would you please add a test case for imm=0?

https://github.com/llvm/llvm-project/pull/119639