[llvm-branch-commits] [llvm] [NFC] Leave a comment in `Local.cpp` about debug info & sample profiling (PR #155296)

[Mircea Trofin via llvm-branch-commits]

https://github.com/mtrofin created https://github.com/llvm/llvm-project/pull/155296

None

>From 8422d7e43ade58187a0c3635640c9d20d2b6f654 Mon Sep 17 00:00:00 2001
From: Mircea Trofin <mtrofin at google.com>
Date: Mon, 25 Aug 2025 21:04:05 +0000
Subject: [PATCH] [NFC] Leave a comment in `Local.cpp` about debug info &
 sample profiling

---
 llvm/lib/Transforms/Utils/Local.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index ac344904f90f0..821a58caf10b2 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -3342,8 +3342,11 @@ void llvm::hoistAllInstructionsInto(BasicBlock *DomBlock, Instruction *InsertPt,
   // retain their original debug locations (DILocations) and debug intrinsic
   // instructions.
   //
-  // Doing so would degrade the debugging experience and adversely affect the
-  // accuracy of profiling information.
+  // Doing so would degrade the debugging experience.
+  //
+  // FIXME: Issue #152767: debug info should also be the same as the
+  // original branch, **if** the user explicitly indicated that (for sampling
+  // PGO)
   //
   // Currently, when hoisting the instructions, we take the following actions:
   // - Remove their debug intrinsic instructions.