Revert r143206, as there are still some failing tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143262 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 16 deletions

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index bfc1690df9..31e522d4d7 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -1353,10 +1353,12 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
       SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
       SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
                                          MVT::i32);
+      // TODO: Disable AlwaysInline when it becomes possible
+      //       to emit a nested call sequence.
       MemOpChains.push_back(DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
                                           Flags.getByValAlign(),
                                           /*isVolatile=*/false,
-                                          /*AlwaysInline=*/false,
+                                          /*AlwaysInline=*/true,
                                           MachinePointerInfo(0),
                                           MachinePointerInfo(0)));
 
@@ -4348,24 +4350,9 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
       // If this is undef splat, generate it via "just" vdup, if possible.
       if (Lane == -1) Lane = 0;
 
-      // Test if V1 is a SCALAR_TO_VECTOR.
       if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
         return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
       }
-      // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
-      // (and probably will turn into a SCALAR_TO_VECTOR once legalization
-      // reaches it).
-      if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
-          !isa<ConstantSDNode>(V1.getOperand(0))) {
-        bool IsScalarToVector = true;
-        for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
-          if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
-            IsScalarToVector = false;
-            break;
-          }
-        if (IsScalarToVector)
-          return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
-      }
       return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
                          DAG.getConstant(Lane, MVT::i32));
     }