Set LoopInterleaved in the PassManagerBuilder.

Summary: Corresponds to D61030. Subscribers: jlebar, cfe-commits, llvm-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D61142 llvm-svn: 359616
llvm · Apr 30, 2019 · a9b9ab8 · a9b9ab8
1 parent 4e1ac95
commit a9b9ab8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
@@ -560,6 +560,9 @@ void EmitAssemblyHelper::CreatePasses(legacy::PassManager &MPM,
   PMBuilder.LoopVectorize = CodeGenOpts.VectorizeLoop;
 
   PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops;
+  // Loop interleaving in the loop vectorizer has historically been set to be
+  // enabled when loop unrolling is enabled.
+  PMBuilder.LoopsInterleaved = CodeGenOpts.UnrollLoops;
   PMBuilder.MergeFunctions = CodeGenOpts.MergeFunctions;
   PMBuilder.PrepareForThinLTO = CodeGenOpts.PrepareForThinLTO;
   PMBuilder.PrepareForLTO = CodeGenOpts.PrepareForLTO;