[llvm] [mlir] [DebugInfo] Remove old decls when converting DI (PR #194964)

[Jeremy Morse via llvm-commits]

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@@ -0,0 +1,62 @@
+; RUN: llc --filetype=asm %s -o  - | FileCheck %s
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jmorse wrote:

If I understand correctly, this test is (effectively) round-tripping LLVM-IR through DXIL compilation, and it's covering the scenario where LLVM would delete the intrinsic declarations and produce a bad output. Please add a comment signalling that this is the intended coverage (refer to the corresponding bug report too perhaps).

https://github.com/llvm/llvm-project/pull/194964