[clang] [llvm] [SimplifyCFG] Extend jump-threading to allow live local defs (PR #135079)

[Yingwei Zheng via cfe-commits]

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@@ -3442,10 +3442,28 @@ bool SimplifyCFGOpt::speculativelyExecuteBB(BranchInst *BI,
   return true;
 }
 
+typedef SmallPtrSet<BasicBlock *, 8> BlocksSet;
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dtcxzyw wrote:

```suggestion
using BlocksSet = SmallPtrSet<BasicBlock *, 8>;
```

https://github.com/llvm/llvm-project/pull/135079