[clang] [llvm] [AMDGPU] Extend readlane, writelane and readfirstlane intrinsic lowering for generic types (PR #89217)

[Matt Arsenault via cfe-commits]

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@@ -0,0 +1,46 @@
+# RUN: not --crash llc -mtriple=amdgcn -run-pass=none -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s
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arsenm wrote:

I'd still test all 3, but yes an IR test 

https://github.com/llvm/llvm-project/pull/89217