Add initial integrated assembler w/ some Xmm ops.

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index 1b65b3ffe8d9ae4f384ca3163477a14f21b9072a..bb5fab0b0e5de02d8fe1a63564fc3e7d5b4a9dbf 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -18,6 +18,7 @@
 
 #include "IceDefs.h"
 #include "IceTargetLowering.h"
+#include "assembler_ia32.h"
 #include "IceInstX8632.h"
 #include "IceRegistersX8632.h"
 
@@ -68,6 +69,7 @@ public:
                               size_t BasicFrameOffset, size_t &InArgsSizeBytes);
   Operand *loOperand(Operand *Operand);
   Operand *hiOperand(Operand *Operand);
+  x86::Address stackVarToAsmOperand(const Variable *Var) const;
 
   enum X86InstructionSet {
     // SSE2 is the PNaCl baseline instruction set.