[llvm] [DirectX] Lower `llvm.lifetime.*` intrinsics to stores when DXIL version is lower than 1.6 (PR #147432)

[Farzon Lotfi via llvm-commits]

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@@ -0,0 +1,30 @@
+; RUN: opt -S -passes='dxil-op-lower' -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s --check-prefixes=CHECK,CHECK-SM63
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farzonl wrote:

I see all the DXIL version 1.6 checks, where are you making the  SM version checks to replace lifetimes with a store undef?

https://github.com/llvm/llvm-project/pull/147432