[llvm] [CodeGen] Use BasicBlock numbers to map to MBBs (PR #101883)

[Nikita Popov via llvm-commits]

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@@ -212,6 +212,11 @@ class FunctionLoweringInfo {
     return ValueMap.count(V);
   }
 
+  MachineBasicBlock *getMBB(const BasicBlock *BB) const {
+    assert(BB->getNumber() < MBBMap.size() && "uninitialized MBBMap?");
+    return MBBMap[BB->getNumber()];
+  }
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nikic wrote:

Can you please pre-commit the addition and use of this method as a separate NFC change? 

https://github.com/llvm/llvm-project/pull/101883