Subzero. X8664. Fix broken call sequence.

src/IceTargetLoweringX86BaseImpl.h

 //===- subzero/src/IceTargetLoweringX86BaseImpl.h - x86 lowering -*- C++ -*-==//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 2134 matching lines @@
       Variable *esp = getPhysicalRegister(getStackReg(), Traits::WordType);
       Constant *Loc = Ctx->getConstantInt32(ParameterAreaSizeBytes);
       StackArgLocations.push_back(
           Traits::X86OperandMem::create(Func, Ty, esp, Loc));
       ParameterAreaSizeBytes += typeWidthInBytesOnStack(Arg->getType());
     }
   }
   // Ensure there is enough space for the fstp/movs for floating returns.
   Variable *Dest = Instr->getDest();
   const Type DestTy = Dest ? Dest->getType() : IceType_void;
-  if (Traits::X86_PASS_SCALAR_FP_IN_XMM) {
+  if (!Traits::X86_PASS_SCALAR_FP_IN_XMM) {
     if (isScalarFloatingType(DestTy)) {
       ParameterAreaSizeBytes =
           std::max(static_cast<size_t>(ParameterAreaSizeBytes),
                    typeWidthInBytesOnStack(DestTy));
     }
   }
   // Adjust the parameter area so that the stack is aligned. It is assumed that
   // the stack is already aligned at the start of the calling sequence.
   ParameterAreaSizeBytes = Traits::applyStackAlignment(ParameterAreaSizeBytes);
   assert(ParameterAreaSizeBytes <= maxOutArgsSizeBytes());
@@ skipping 4732 matching lines @@
         Func, MemOperand->getType(), RegTemp, nullptr, MemOperand->getIndex(),
         MemOperand->getShift(), MemOperand->getSegmentRegister());
     return NewMemOperand;
   }
   }
 }
 } // end of namespace X86NAMESPACE
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX86BASEIMPL_H