[clang-tools-extra] [clang] [llvm] [PGO] Sampled instrumentation in PGO to speed up instrumentation binary (PR #69535)

[via cfe-commits]

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@@ -770,7 +770,7 @@ BasicBlock *FuncPGOInstrumentation<Edge, BBInfo>::getInstrBB(Edge *E) {
   auto canInstrument = [](BasicBlock *BB) -> BasicBlock * {
     // There are basic blocks (such as catchswitch) cannot be instrumented.
     // If the returned first insertion point is the end of BB, skip this BB.
-    if (BB->getFirstInsertionPt() == BB->end())
+    if (BB->getFirstNonPHIOrDbgOrAlloca() == BB->end())
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WenleiHe wrote:

what is the reason to instrument after alloca?

https://github.com/llvm/llvm-project/pull/69535