make CAS work

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47799 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

@@ -5358,10 +5358,10 @@ SDOperand X86TargetLowering::LowerCAS(SDOperand Op, SelectionDAG &DAG) {
   case MVT::i32: Reg = X86::EAX; size = 4; break;
   };
   SDOperand cpIn = DAG.getCopyToReg(Op.getOperand(0), Reg,
-                                    Op.getOperand(2), SDOperand());
+                                    Op.getOperand(3), SDOperand());
   SDOperand Ops[] = { cpIn.getValue(0),
                        Op.getOperand(1),
-                       Op.getOperand(3),
+                       Op.getOperand(2),
                        DAG.getTargetConstant(size, MVT::i8),
                        cpIn.getValue(1) };
   SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);

lib/Target/X86/X86InstrInfo.td

@@ -2548,6 +2548,7 @@ def EH_RETURN   : I<0xC3, RawFrm, (outs), (ins GR32:$addr),
 
 //FIXME: Please check the format Pseudo is certainly wrong, but the opcode and
 //       prefixes should be correct
+
 let Defs = [EAX, EFLAGS], Uses = [EAX] in {
 def CMPXCHG32 : I<0xB1, Pseudo, (outs), (ins i32mem:$ptr, GR32:$swap),
                "cmpxchgl $swap,$ptr", []>, TB;