[CodeGen] Use llvm::Type::getVectorNumElements instead of casting to llvm::VectorType and calling getNumElements. This is equivalent and shorter.

llvm-svn: 274823
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 92e3747..2258957 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -2552,7 +2552,7 @@
 }
 
 Value *CodeGenFunction::EmitNeonSplat(Value *V, Constant *C) {
-  unsigned nElts = cast<llvm::VectorType>(V->getType())->getNumElements();
+  unsigned nElts = V->getType()->getVectorNumElements();
   Value* SV = llvm::ConstantVector::getSplat(nElts, C);
   return Builder.CreateShuffleVector(V, V, SV, "lane");
 }
@@ -7007,8 +7007,7 @@
   case X86::BI__builtin_ia32_palignr512_mask: {
     unsigned ShiftVal = cast<llvm::ConstantInt>(Ops[2])->getZExtValue();
 
-    unsigned NumElts =
-      cast<llvm::VectorType>(Ops[0]->getType())->getNumElements();
+    unsigned NumElts = Ops[0]->getType()->getVectorNumElements();
     assert(NumElts % 16 == 0);
 
     // If palignr is shifting the pair of vectors more than the size of two
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 50fbadf..3e1ae36 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1758,8 +1758,7 @@
 
   if (const VectorType *VTy = Dst.getType()->getAs<VectorType>()) {
     unsigned NumSrcElts = VTy->getNumElements();
-    unsigned NumDstElts =
-       cast<llvm::VectorType>(Vec->getType())->getNumElements();
+    unsigned NumDstElts = Vec->getType()->getVectorNumElements();
     if (NumDstElts == NumSrcElts) {
       // Use shuffle vector is the src and destination are the same number of
       // elements and restore the vector mask since it is on the side it will be
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 67ee517..064bc95 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -818,7 +818,7 @@
            "Splatted expr doesn't match with vector element type?");
 
     // Splat the element across to all elements
-    unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements();
+    unsigned NumElements = DstTy->getVectorNumElements();
     return Builder.CreateVectorSplat(NumElements, Src, "splat");
   }
 
@@ -1529,7 +1529,7 @@
     llvm::Type *DstTy = ConvertType(DestTy);
     Value *Elt = Visit(const_cast<Expr*>(E));
     // Splat the element across to all elements
-    unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements();
+    unsigned NumElements = DstTy->getVectorNumElements();
     return Builder.CreateVectorSplat(NumElements, Elt, "splat");
   }