[llvm-branch-commits] [llvm] [ctx_prof] Don't try finding callsite annotation for un-instrumentable callsites (PR #109184)

[Mircea Trofin via llvm-branch-commits]

https://github.com/mtrofin created https://github.com/llvm/llvm-project/pull/109184

None

>From 987562aab1c409b62b1a4c5d6d8566ad812b8313 Mon Sep 17 00:00:00 2001
From: Mircea Trofin <mtrofin at google.com>
Date: Tue, 17 Sep 2024 22:03:30 -0700
Subject: [PATCH] [ctx_prof] Don't try finding callsite annotation for
 un-instrumentable callsites

---
 llvm/lib/Analysis/CtxProfAnalysis.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Analysis/CtxProfAnalysis.cpp b/llvm/lib/Analysis/CtxProfAnalysis.cpp
index c29709b613410e..3df72983862d98 100644
--- a/llvm/lib/Analysis/CtxProfAnalysis.cpp
+++ b/llvm/lib/Analysis/CtxProfAnalysis.cpp
@@ -234,16 +234,23 @@ PreservedAnalyses CtxProfAnalysisPrinterPass::run(Module &M,
 }
 
 InstrProfCallsite *CtxProfAnalysis::getCallsiteInstrumentation(CallBase &CB) {
-  for (auto *Prev = CB.getPrevNode(); Prev; Prev = Prev->getPrevNode())
+  if (!InstrProfCallsite::canInstrumentCallsite(CB))
+    return nullptr;
+  for (auto *Prev = CB.getPrevNode(); Prev; Prev = Prev->getPrevNode()) {
     if (auto *IPC = dyn_cast<InstrProfCallsite>(Prev))
       return IPC;
+    assert(!isa<CallBase>(Prev) &&
+           "didn't expect to find another call, that's not the callsite "
+           "instrumentation, before an instrumentable callsite");
+  }
   return nullptr;
 }
 
 InstrProfIncrementInst *CtxProfAnalysis::getBBInstrumentation(BasicBlock &BB) {
   for (auto &I : BB)
     if (auto *Incr = dyn_cast<InstrProfIncrementInst>(&I))
-      return Incr;
+      if (!isa<InstrProfIncrementInstStep>(&I))
+        return Incr;
   return nullptr;
 }