Revert "New interface function is added to VectorUtils Value *getSplatValue(Value...

[oota-llvm.git] / lib / Analysis / VectorUtils.cpp

diff --git a/lib/Analysis/VectorUtils.cpp b/lib/Analysis/VectorUtils.cpp
index 92a880c3762b501c808efc440cc18df4eca26efa..72140952ecb37d3c1b928ac91033f9f5451bdd37 100644 (file)
--- a/lib/Analysis/VectorUtils.cpp
+++ b/lib/Analysis/VectorUtils.cpp
@@ -18,8 +18,6 @@
 #include "llvm/IR/GetElementPtrTypeIterator.h"
 #include "llvm/IR/PatternMatch.h"
 #include "llvm/IR/Value.h"
-#include "llvm/IR/Constants.h"
-
 using namespace llvm;
 using namespace llvm::PatternMatch;
 
@@ -408,27 +406,3 @@ Value *llvm::findScalarElement(Value *V, unsigned EltNo) {
   // Otherwise, we don't know.
   return nullptr;
 }
-
-/// \brief Get splat value if the input is a splat vector or return nullptr.
-/// The value may be extracted from a splat constants vector or from
-/// a sequence of instructions that broadcast a single value into a vector.
-llvm::Value *llvm::getSplatValue(Value *V) {
-  llvm::ConstantDataVector *CV = dyn_cast<llvm::ConstantDataVector>(V);
-  if (CV)
-    return CV->getSplatValue();
-  llvm::ShuffleVectorInst *ShuffleInst = dyn_cast<llvm::ShuffleVectorInst>(V);
-  if (!ShuffleInst)
-    return nullptr;
-  // All-zero (our undef) shuffle mask elements.
-  for (int i : ShuffleInst->getShuffleMask())
-    if (i != 0 && i != -1)
-      return nullptr;
-  // The first shuffle source is 'insertelement' with index 0.
-  llvm::InsertElementInst *InsertEltInst =
-    dyn_cast<llvm::InsertElementInst>(ShuffleInst->getOperand(0));
-  if (!InsertEltInst || !isa<ConstantInt>(InsertEltInst->getOperand(2)) ||
-      !cast<ConstantInt>(InsertEltInst->getOperand(2))->isNullValue())
-    return nullptr;
-
-  return InsertEltInst->getOperand(1);
-}