Invoke PruneEH pass before Sample Profile pass.

[danielcdh]

Summary

We need to call PruneEH pass before AutoFDO pass so that some EH-related calls can get inlined in Sample Profile pass.

[dnovillo]

A small test case, perhaps?

Thanks. Diego.

[danielcdh]

add test

[dnovillo]

LGTM. Thanks!

lib/CodeGen/BackendUtil.cpp

if (!CodeGenOpts.InstrProfileOutput.empty())
       PMBuilder.PGOInstrGen = CodeGenOpts.InstrProfileOutput;
     else
       PMBuilder.PGOInstrGen = "default.profraw";
   }
   if (CodeGenOpts.hasProfileIRUse())
     PMBuilder.PGOInstrUse = CodeGenOpts.ProfileInstrumentUsePath;
 
   if (!CodeGenOpts.SampleProfileFile.empty()) {
+    MPM->add(createPruneEHPass());
     MPM->add(createSampleProfileLoaderPass(CodeGenOpts.SampleProfileFile));
     PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
                            addInstructionCombiningPass);
   }
 
   PMBuilder.populateFunctionPassManager(*FPM);
   PMBuilder.populateModulePassManager(*MPM);
 }