Reverse the 'if' condition and reduce the indentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171172 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index b6efc28316ae340e363850beef6c1e2251156840..263a5d668a56a5302483fad59d187d8f61763f57 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -9549,45 +9549,44 @@ SDValue X86TargetLowering::LowerSIGN_EXTEND(SDValue Op,
   EVT InVT = In.getValueType();
   DebugLoc dl = Op->getDebugLoc();
 
-  if ((VT == MVT::v4i64 && InVT == MVT::v4i32) ||
-      (VT == MVT::v8i32 && InVT == MVT::v8i16)) {
+  if ((VT != MVT::v4i64 || InVT != MVT::v4i32) &&
+      (VT != MVT::v8i32 || InVT != MVT::v8i16))
+    return SDValue();
 
-    if (Subtarget->hasInt256())
-      return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
+  if (Subtarget->hasInt256())
+    return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
 
-    // Optimize vectors in AVX mode
-    // Sign extend  v8i16 to v8i32 and
-    //              v4i32 to v4i64
-    //
-    // Divide input vector into two parts
-    // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
-    // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
-    // concat the vectors to original VT
+  // Optimize vectors in AVX mode
+  // Sign extend  v8i16 to v8i32 and
+  //              v4i32 to v4i64
+  //
+  // Divide input vector into two parts
+  // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
+  // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
+  // concat the vectors to original VT
 
-    unsigned NumElems = InVT.getVectorNumElements();
-    SDValue Undef = DAG.getUNDEF(InVT);
+  unsigned NumElems = InVT.getVectorNumElements();
+  SDValue Undef = DAG.getUNDEF(InVT);
 
-    SmallVector<int,8> ShufMask1(NumElems, -1);
-    for (unsigned i = 0; i != NumElems/2; ++i)
-      ShufMask1[i] = i;
+  SmallVector<int,8> ShufMask1(NumElems, -1);
+  for (unsigned i = 0; i != NumElems/2; ++i)
+    ShufMask1[i] = i;
 
-    SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
+  SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
 
-    SmallVector<int,8> ShufMask2(NumElems, -1);
-    for (unsigned i = 0; i != NumElems/2; ++i)
-      ShufMask2[i] = i + NumElems/2;
+  SmallVector<int,8> ShufMask2(NumElems, -1);
+  for (unsigned i = 0; i != NumElems/2; ++i)
+    ShufMask2[i] = i + NumElems/2;
 
-    SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
+  SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
 
-    EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
-                                  VT.getVectorNumElements()/2);
+  EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
+                                VT.getVectorNumElements()/2);
 
-    OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
-    OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
+  OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
+  OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
 
-    return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
-  }
-  return SDValue();
+  return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
 }
 
 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or