[llvm] [PassBuilder] Add callback invoking to PassBuilder string API (PR #157153)

[Min-Yih Hsu via llvm-commits]

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@@ -92,7 +92,7 @@ if (PIC) {
     return true;                                                               \
   }
 
-PB.registerPipelineParsingCallback([=](StringRef Name, ModulePassManager &PM,
+PB.registerPipelineParsingCallback([&](StringRef Name, ModulePassManager &PM,
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mshockwave wrote:

I might be missing something: why was this changed from captured by value to captured by reference.

https://github.com/llvm/llvm-project/pull/157153