[llvm] Reland "[NewPM][CodeGen] Port selection dag isel to new pass manager" (PR #94149)

[via llvm-commits]

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@@ -51,6 +54,10 @@ class SelectionDAGISel : public MachineFunctionPass {
   AAResults *AA = nullptr;
   AssumptionCache *AC = nullptr;
   GCFunctionInfo *GFI = nullptr;
+  SSPLayoutInfo *SP = nullptr;
+#ifndef NDEBUG
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aengelke wrote:

Shouldn't this be `#if LLVM_ENABLE_ABI_BREAKING_CHECKS`?

https://github.com/llvm/llvm-project/pull/94149