[llvm] [llvm-extract] support unnamed bb. (PR #134974)

[Arthur Eubanks via llvm-commits]

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@@ -355,9 +358,25 @@ int main(int argc, char **argv) {
       for (StringRef BBName : P.second) {
         // The function has been materialized, so add its matching basic blocks
         // to the block extractor list, or fail if a name is not found.
+#ifndef NDEBUG
         auto Res = llvm::find_if(*P.first, [&](const BasicBlock &BB) {
-          return BB.getName() == BBName;
+          return BB.getNameOrAsOperand() == BBName;
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aeubanks wrote:

we should make `getNameOrAsOperand()` available in non-debug builds as well to avoid the duplicated logic here

https://github.com/llvm/llvm-project/pull/134974