SelectionDAG: Remove unnecessary uses of TargetLowering::getPointerTy()

If we have a binary operation like ISD:ADD, we can set the result type
equal to the result type of one of its operands rather than using
TargetLowering::getPointerTy().

Also, any use of DAG.getIntPtrConstant(C) as an operand for a binary
operation can be replaced with:
DAG.getConstant(C, OtherOperand.getValueType());

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189227 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index ef3466b..086313b 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4780,14 +4780,14 @@
     SDValue CfaArg = DAG.getSExtOrTrunc(getValue(I.getArgOperand(0)), sdl,
                                         TLI->getPointerTy());
     SDValue Offset = DAG.getNode(ISD::ADD, sdl,
-                                 TLI->getPointerTy(),
+                                 CfaArg.getValueType(),
                                  DAG.getNode(ISD::FRAME_TO_ARGS_OFFSET, sdl,
-                                             TLI->getPointerTy()),
+                                             CfaArg.getValueType()),
                                  CfaArg);
     SDValue FA = DAG.getNode(ISD::FRAMEADDR, sdl,
                              TLI->getPointerTy(),
                              DAG.getConstant(0, TLI->getPointerTy()));
-    setValue(&I, DAG.getNode(ISD::ADD, sdl, TLI->getPointerTy(),
+    setValue(&I, DAG.getNode(ISD::ADD, sdl, FA.getValueType(),
                              FA, Offset));
     return 0;
   }