[llvm] b87a5fb - [VectorCombine] Add "VC: Visiting" debug message to help the log show the instruction folding order.

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2024-12-20T14:57:58Z
New Revision: b87a5fb9fd8d50c911ac95f6854389d287542010

URL: https://github.com/llvm/llvm-project/commit/b87a5fb9fd8d50c911ac95f6854389d287542010
DIFF: https://github.com/llvm/llvm-project/commit/b87a5fb9fd8d50c911ac95f6854389d287542010.diff

LOG: [VectorCombine] Add "VC: Visiting" debug message to help the log show the instruction folding order.

Added: 
    

Modified: 
    llvm/lib/Transforms/Vectorize/VectorCombine.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
index deff00ff1ae528..37bf44122043cc 100644
--- a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
+++ b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
@@ -3041,6 +3041,8 @@ bool VectorCombine::run() {
     bool IsFixedVectorType = isa<FixedVectorType>(I.getType());
     auto Opcode = I.getOpcode();
 
+    LLVM_DEBUG(dbgs() << "VC: Visiting: " << I << '\n');
+
     // These folds should be beneficial regardless of when this pass is run
     // in the optimization pipeline.
     // The type checking is for run-time efficiency. We can avoid wasting time