[llvm] [NewPM][CodeGen] add TargetPassConfig like API (PR #70906)

[Arthur Eubanks via llvm-commits]

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@@ -929,6 +1083,8 @@ Error CodeGenPassBuilder<Derived>::addMachinePasses(
     // clobbered registers, to be used to optimize call sites.
     addPass(RegUsageInfoCollectorPass());
 
+  // FIXME: Some backends are incompatible with running the verifier after
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aeubanks wrote:

this FIXME doesn't look like it's in the right place

https://github.com/llvm/llvm-project/pull/70906