[VectorCombine] replaceValue - add "VC: Replacing" debug message to h…

…elp the log show replacement for old/new.
Ericsson · Jan 2, 2025 · f739aa4 · f739aa4
1 parent 5ed6229
commit f739aa4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
@@ -128,6 +128,8 @@ class VectorCombine {
   bool shrinkType(Instruction &I);
 
   void replaceValue(Value &Old, Value &New) {
+    LLVM_DEBUG(dbgs() << "VC: Replacing: " << Old << '\n');
+    LLVM_DEBUG(dbgs() << "         With: " << New << '\n');
     Old.replaceAllUsesWith(&New);
     if (auto *NewI = dyn_cast<Instruction>(&New)) {
       New.takeName(&Old);