[clang] [llvm] [EntryExitInstrumenter] Move passes out of clang into LLVM default pipelines (PR #92171)

[Arthur Eubanks via cfe-commits]

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@@ -1030,6 +1036,12 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
       Phase != ThinOrFullLTOPhase::ThinLTOPostLink)
     MPM.addPass(SampleProfileProbePass(TM));
 
+  // Instrument function entry and exit before all inlining.
+  if (!isLTOPostLink(Phase)) {
+    MPM.addPass(createModuleToFunctionPassAdaptor(
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aeubanks wrote:

if you have a small local repro, you can pass `-Wl,-mllvm,-print-after-all` to the link command to have it print IR after every pass and see where the calls are getting added. or to see changes in the pre-link optimization pipeline, `-mllvm=-print-after-all` (or `-mllvm=-print-changed=quiet`, which doesn't work with the IR parts of the codegen pipeline for *reasons*)

https://github.com/llvm/llvm-project/pull/92171