[PATCH] D159169: [CSSPGO] Refactoring findIRAnchors

Lei Wang via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Aug 30 11:05:58 PDT 2023

wlei added inline comments.

Comment at: llvm/lib/Transforms/IPO/SampleProfile.cpp:2162-2164
+          LineLocation IRCallsite = FunctionSamples::getCallSiteIdentifier(DIL);
+          StringRef CalleeName = FindCalleeName(dyn_cast<CallBase>(&I));
+          IRAnchors.emplace(IRCallsite, CalleeName);
wenlei wrote:
> Actually can this be unified with `FindTopLevelFrame`? For not inlined calls, `DIL->getSubprogramLinkageName` should be equivalent to `FindCalleeName(dyn_cast<CallBase>(&I))`?
Good point, but to clarify:
`DIL->getSubprogramLinkageName` is the current/top-level Frame. 
`FindCalleeName` is the current callee name, it's the second top Frame.

Maybe my variable name is misleading in the new patch. Here is actually not `FindTopLevelFrame`, For example: "main:1 @ foo", the term "top-level" frame is "main:1", but here what it returns is {1, foo} , i,e {the top-level frame's location, the second top's frame's func name}

uh..I need to fix it.

That said, maybe we still can merge `FindTopLevelFrame` and `FindCalleeName `, like check if it's inlined code inside of the lambda, let me think.

  rG LLVM Github Monorepo



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