[llvm] [SPIRV] Emitting DebugSource, DebugCompileUnit (PR #97558)

[Michal Paszkowski via llvm-commits]

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+; RUN: llc -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
+
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michalpaszkowski wrote:

Do we generate valid output SPIR-V in the case of this test? If so, we could have a `spirv-val` line added as well. Otherwise, you could add a `TODO: spirv-val`. We have similar lines in other LITs.

https://github.com/llvm/llvm-project/pull/97558