[NVPTX] Enable the load-store vectorizer on nvptx.

Reviewers: tra

Subscribers: jholewinski, arsenm, asbirlea

Differential Revision: https://reviews.llvm.org/D22592

llvm-svn: 276196

2 files changed, 11 insertions, 1 deletions

diff --git a/llvm/lib/Target/NVPTX/LLVMBuild.txt b/llvm/lib/Target/NVPTX/LLVMBuild.txt
index 6ea244a0a42..70a2de3441c 100644
--- a/llvm/lib/Target/NVPTX/LLVMBuild.txt
+++ b/llvm/lib/Target/NVPTX/LLVMBuild.txt
@@ -28,5 +28,5 @@ has_asmprinter = 1
 type = Library
 name = NVPTXCodeGen
 parent = NVPTX
-required_libraries = Analysis AsmPrinter CodeGen Core MC NVPTXAsmPrinter NVPTXDesc NVPTXInfo Scalar SelectionDAG Support Target TransformUtils
+required_libraries = Analysis AsmPrinter CodeGen Core MC NVPTXAsmPrinter NVPTXDesc NVPTXInfo Scalar SelectionDAG Support Target TransformUtils Vectorize
 add_to_library_groups = NVPTX
diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
index 3dffc22b48d..d83154aa46d 100644
--- a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
@@ -46,6 +46,7 @@
 #include "llvm/Target/TargetSubtargetInfo.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Scalar/GVN.h"
+#include "llvm/Transforms/Vectorize.h"
 
 using namespace llvm;
 
@@ -54,6 +55,13 @@ static cl::opt<bool> UseInferAddressSpaces(
     cl::desc("Optimize address spaces using NVPTXInferAddressSpaces instead of "
              "NVPTXFavorNonGenericAddrSpaces"));
 
+// LSV is still relatively new; this switch lets us turn it off in case we
+// encounter (or suspect) a bug.
+static cl::opt<bool>
+    DisableLoadStoreVectorizer("disable-nvptx-load-store-vectorizer",
+                               cl::desc("Disable load/store vectorizer"),
+                               cl::init(false), cl::Hidden);
+
 namespace llvm {
 void initializeNVVMIntrRangePass(PassRegistry&);
 void initializeNVVMReflectPass(PassRegistry&);
@@ -258,6 +266,8 @@ void NVPTXPassConfig::addIRPasses() {
   addPass(createNVPTXLowerArgsPass(&getNVPTXTargetMachine()));
   if (getOptLevel() != CodeGenOpt::None) {
     addAddressSpaceInferencePasses();
+    if (!DisableLoadStoreVectorizer)
+      addPass(createLoadStoreVectorizerPass());
     addStraightLineScalarOptimizationPasses();
   }