[X86] Renamed lowerVectorShuffleAsUnpack NFCI.

Renamed to lowerVectorShuffleAsPermuteAndUnpack to make it clear that it lowers to more than just a UNPCK instruction.

llvm-svn: 247513

1 files changed, 10 insertions, 9 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 415ec312793..4ac3b0f7ae5 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -7867,9 +7867,10 @@ static SDValue lowerVectorShuffleAsInsertPS(SDValue Op, SDValue V1, SDValue V2,
 /// because for floating point vectors we have a generalized SHUFPS lowering
 /// strategy that handles everything that doesn't *exactly* match an unpack,
 /// making this clever lowering unnecessary.
-static SDValue lowerVectorShuffleAsUnpack(SDLoc DL, MVT VT, SDValue V1,
-                                          SDValue V2, ArrayRef<int> Mask,
-                                          SelectionDAG &DAG) {
+static SDValue lowerVectorShuffleAsPermuteAndUnpack(SDLoc DL, MVT VT,
+                                                    SDValue V1, SDValue V2,
+                                                    ArrayRef<int> Mask,
+                                                    SelectionDAG &DAG) {
   assert(!VT.isFloatingPoint() &&
          "This routine only supports integer vectors.");
   assert(!isSingleInputShuffleMask(Mask) &&
@@ -8456,8 +8457,8 @@ static SDValue lowerV4I32VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
                                                       Mask, DAG);
 
   // Try to lower by permuting the inputs into an unpack instruction.
-  if (SDValue Unpack =
-          lowerVectorShuffleAsUnpack(DL, MVT::v4i32, V1, V2, Mask, DAG))
+  if (SDValue Unpack = lowerVectorShuffleAsPermuteAndUnpack(DL, MVT::v4i32, V1,
+                                                            V2, Mask, DAG))
     return Unpack;
 
   // We implement this with SHUFPS because it can blend from two vectors.
@@ -9085,8 +9086,8 @@ static SDValue lowerV8I16VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
           lowerVectorShuffleAsBitBlend(DL, MVT::v8i16, V1, V2, Mask, DAG))
     return BitBlend;
 
-  if (SDValue Unpack =
-          lowerVectorShuffleAsUnpack(DL, MVT::v8i16, V1, V2, Mask, DAG))
+  if (SDValue Unpack = lowerVectorShuffleAsPermuteAndUnpack(DL, MVT::v8i16, V1,
+                                                            V2, Mask, DAG))
     return Unpack;
 
   // If we can't directly blend but can use PSHUFB, that will be better as it
@@ -9363,8 +9364,8 @@ static SDValue lowerV16I8VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
       // FIXME: It might be worth trying to detect if the unpack-feeding
       // shuffles will both be pshufb, in which case we shouldn't bother with
       // this.
-      if (SDValue Unpack =
-              lowerVectorShuffleAsUnpack(DL, MVT::v16i8, V1, V2, Mask, DAG))
+      if (SDValue Unpack = lowerVectorShuffleAsPermuteAndUnpack(
+              DL, MVT::v16i8, V1, V2, Mask, DAG))
         return Unpack;
     }