Rename function to be more specific and be more strict about its usage
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135725 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 6ce531a..17d47e7 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5376,15 +5376,17 @@
OpVT, SrcOp)));
}
-/// LowerVECTOR_SHUFFLE_4wide - Handle all 4 wide cases with a number of
-/// shuffles.
+/// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
+/// 4 elements, and match them with several different shuffle types.
static SDValue
-LowerVECTOR_SHUFFLE_4wide(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
+LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
SDValue V1 = SVOp->getOperand(0);
SDValue V2 = SVOp->getOperand(1);
DebugLoc dl = SVOp->getDebugLoc();
EVT VT = SVOp->getValueType(0);
+ assert(VT.getSizeInBits() == 128 && "Unsupported vector size");
+
SmallVector<std::pair<int, int>, 8> Locs;
Locs.resize(4);
SmallVector<int, 8> Mask1(4U, -1);
@@ -6094,9 +6096,10 @@
return NewOp;
}
- // Handle all 4 wide cases with a number of shuffles.
- if (NumElems == 4)
- return LowerVECTOR_SHUFFLE_4wide(SVOp, DAG);
+ // Handle all 128-bit wide vectors with 4 elements, and match them with
+ // several different shuffle types.
+ if (NumElems == 4 && VT.getSizeInBits() == 128)
+ return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
// Handle VPERMIL permutations
if (isVPERMILMask(M, VT)) {