[llvm] [SampleFDO] Support enabling sample loader pass in O0 mode (PR #113985)

[Matthias Braun via llvm-commits]

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@@ -2326,6 +2327,9 @@ PreservedAnalyses SampleProfileLoaderPass::run(Module &M,
 
   if (!FS)
     FS = vfs::getRealFileSystem();
+  if (!DisableSampleLoaderInlining.getNumOccurrences() &&
+      DisableSampleProfileInlining)
+    DisableSampleLoaderInlining = true;
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MatzeB wrote:

oh I think I misread the variables names. This actually changes the `cl::opt` setting based on the class parameter... I think that is dangerous then. In a ThinLTO or similar setting we could have multiple threads / LLVMContexts using different settings so we shouldn't just change the global variables IMO

https://github.com/llvm/llvm-project/pull/113985