fix obviously bogus (IMO) operand index of the load in asserts

(load only has one operand) and smuggle in some whitespace changes too

NB: I am obviously testing the water here, and believe that the unguarded
    cast is still wrong, but why is the getZExtValue of the load's operand
    tested against zero here? Any review is appreciated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155190 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCISelLowering.cpp

@@ -902,7 +902,7 @@ bool PPCTargetLowering::SelectAddressRegImm(SDValue N, SDValue &Disp,
       return true; // [r+i]
     } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
       // Match LOAD (ADD (X, Lo(G))).
-     assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()
+      assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(0))->getZExtValue()
              && "Cannot handle constant offsets yet!");
       Disp = N.getOperand(1).getOperand(0);  // The global address.
       assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
@@ -1006,7 +1006,7 @@ bool PPCTargetLowering::SelectAddressRegImmShift(SDValue N, SDValue &Disp,
   if (N.getOpcode() == ISD::ADD) {
     short imm = 0;
     if (isIntS16Immediate(N.getOperand(1), imm) && (imm & 3) == 0) {
-      Disp =  DAG.getTargetConstant(((int)imm & 0xFFFF) >> 2, MVT::i32);
+      Disp = DAG.getTargetConstant(((int)imm & 0xFFFF) >> 2, MVT::i32);
       if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
         Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
       } else {
@@ -1015,7 +1015,7 @@ bool PPCTargetLowering::SelectAddressRegImmShift(SDValue N, SDValue &Disp,
       return true; // [r+i]
     } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
       // Match LOAD (ADD (X, Lo(G))).
-     assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()
+      assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(0))->getZExtValue()
              && "Cannot handle constant offsets yet!");
       Disp = N.getOperand(1).getOperand(0);  // The global address.
       assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||