Print NewPM passes

-C passes=list was printing passes for the legacy pass manager.
Use PassBuilder::printPassNames() to print NewPM passes instead.

Author: nikic

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -987,22 +987,8 @@ LLVMRustPrintModule(LLVMModuleRef M, const char *Path, DemangleFn Demangle) {
 }
 
 extern "C" void LLVMRustPrintPasses() {
-  struct MyListener : PassRegistrationListener {
-    void passEnumerate(const PassInfo *Info) {
-      StringRef PassArg = Info->getPassArgument();
-      StringRef PassName = Info->getPassName();
-      if (!PassArg.empty()) {
-        // These unsigned->signed casts could theoretically overflow, but
-        // realistically never will (and even if, the result is implementation
-        // defined rather plain UB).
-        printf("%15.*s - %.*s\n", (int)PassArg.size(), PassArg.data(),
-               (int)PassName.size(), PassName.data());
-      }
-    }
-  } Listener;
-
-  PassRegistry *PR = PassRegistry::getPassRegistry();
-  PR->enumerateWith(&Listener);
+  PassBuilder PB;
+  PB.printPassNames(outs());
 }
 
 extern "C" void LLVMRustRunRestrictionPass(LLVMModuleRef M, char **Symbols,