[clang] [lld] [llvm] [LTO] enable `ObjCARCContractPass` only on optimized build (PR #101114)

[Peter Rong via cfe-commits]

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@@ -588,12 +588,6 @@ bool EmitAssemblyHelper::AddEmitPasses(legacy::PassManager &CodeGenPasses,
   // this also adds codegenerator level optimization passes.
   CodeGenFileType CGFT = getCodeGenFileType(Action);
 
-  // Add ObjC ARC final-cleanup optimizations. This is done as part of the
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DataCorrupted wrote:

Don't run this optimization on O0 has been there for 10+ yrs since 1170b0885f635ef8566. Unfortunately I don't know the committer, but he/she/they probably did it for a reason :(

https://github.com/llvm/llvm-project/pull/101114