[PATCH] D103970: Fix range-loop-analysis warning

[Keith Smiley via Phabricator via llvm-commits]

keith created this revision.
keith added a reviewer: sdesmalen.
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  llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:8024:19: warning: loop variable 'VF' of type 'const llvm::ElementCount' creates a copy from type 'const llvm::ElementCount' [-Wrange-loop-analysis]
    for (const auto VF : VFCandidates) {
                    ^
  llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:8024:8: note: use reference type 'const llvm::ElementCount &' to prevent copying
    for (const auto VF : VFCandidates) {
         ^~~~~~~~~~~~~~~
                    &
  1 warning generated.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103970

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp


Index: llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -8021,7 +8021,7 @@
        ElementCount::isKnownLE(VF, MaxFactors.ScalableVF); VF *= 2)
     VFCandidates.insert(VF);
 
-  for (const auto VF : VFCandidates) {
+  for (const auto &VF : VFCandidates) {
     // Collect Uniform and Scalar instructions after vectorization with VF.
     CM.collectUniformsAndScalars(VF);
 


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