[llvm] [llvm-exegesis] Error instead of aborting on verification failure (PR #137581)

[Min-Yih Hsu via llvm-commits]

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@@ -323,10 +324,8 @@ Error assembleToStream(const ExegesisTarget &ET,
   TPC->printAndVerify("After ExegesisTarget::addTargetSpecificPasses");
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mshockwave wrote:

But the verifier added here and line 321 would still abort upon verification failure. Should we also return Error for these two places?

https://github.com/llvm/llvm-project/pull/137581