[llvm] [AMDGPU] ISel for @llvm.amdgcn.cs.chain intrinsic (PR #68186)

[Jay Foad via llvm-commits]

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@@ -3570,6 +3606,8 @@ SDValue SITargetLowering::LowerCall(CallLoweringInfo &CLI,
     InGlue = Chain.getValue(1);
   }
 
+  auto *TRI = static_cast<const SIRegisterInfo *>(Subtarget->getRegisterInfo());
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jayfoad wrote:

What is this for?

https://github.com/llvm/llvm-project/pull/68186