[clang] [llvm] [DropUnnecessaryAssumes] Add pass for dropping assumes (PR #159403)

[Yingwei Zheng via cfe-commits]

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@@ -1498,6 +1499,9 @@ PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
   invokeOptimizerEarlyEPCallbacks(MPM, Level, LTOPhase);
 
   FunctionPassManager OptimizePM;
+  if (!isLTOPreLink(LTOPhase))
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dtcxzyw wrote:

It deserves a comment here to explain why it only runs at post-inline and post-link.

https://github.com/llvm/llvm-project/pull/159403