[llvm] r232047 - IRBuilder: add a CreateShuffleVector function that takes an ArrayRef of int

[Sanjay Patel]

Author: spatel
Date: Thu Mar 12 10:27:07 2015
New Revision: 232047

URL: http://llvm.org/viewvc/llvm-project?rev=232047&view=rev
Log:
IRBuilder: add a CreateShuffleVector function that takes an ArrayRef of int

This is a convenience function to ease mask creation of ShuffleVectors
in AutoUpgrade and other places.

Differential Revision: http://reviews.llvm.org/D8184


Modified:
    llvm/trunk/include/llvm/IR/IRBuilder.h
    llvm/trunk/lib/IR/AutoUpgrade.cpp

Modified: llvm/trunk/include/llvm/IR/IRBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/IRBuilder.h?rev=232047&r1=232046&r2=232047&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/IRBuilder.h (original)
+++ llvm/trunk/include/llvm/IR/IRBuilder.h Thu Mar 12 10:27:07 2015
@@ -1486,6 +1486,16 @@ public:
     return Insert(new ShuffleVectorInst(V1, V2, Mask), Name);
   }
 
+  Value *CreateShuffleVector(Value *V1, Value *V2, ArrayRef<int> IntMask,
+                             const Twine &Name = "") {
+    size_t MaskSize = IntMask.size();
+    SmallVector<Constant*, 8> MaskVec(MaskSize);
+    for (size_t i = 0; i != MaskSize; ++i)
+      MaskVec[i] = getInt32(IntMask[i]);
+    Value *Mask = ConstantVector::get(MaskVec);
+    return CreateShuffleVector(V1, V2, Mask, Name);
+  }
+
   Value *CreateExtractValue(Value *Agg,
                             ArrayRef<unsigned> Idxs,
                             const Twine &Name = "") {

Modified: llvm/trunk/lib/IR/AutoUpgrade.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/AutoUpgrade.cpp?rev=232047&r1=232046&r2=232047&view=diff
==============================================================================
--- llvm/trunk/lib/IR/AutoUpgrade.cpp (original)
+++ llvm/trunk/lib/IR/AutoUpgrade.cpp Thu Mar 12 10:27:07 2015
@@ -568,11 +568,9 @@ void llvm::UpgradeIntrinsicCall(CallInst
           CI->getArgOperand(0),
           PointerType::getUnqual(VectorType::get(Type::getInt64Ty(C), 2)));
       Value *Load = Builder.CreateLoad(Op);
-      SmallVector<Constant *, 4> Idxs; // 0, 1, 0, 1.
-      for (unsigned i = 0; i != 4; ++i)
-        Idxs.push_back(Builder.getInt32(i & 1));
+      int Idxs[4] = { 0, 1, 0, 1 };
       Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
-                                        ConstantVector::get(Idxs));
+                                        Idxs);
     } else if (Name == "llvm.x86.sse2.psll.dq") {
       // 128-bit shift left specified in bits.
       unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();