Add support for XMM registers in SSA code generation pipeline.

runtime/vm/assembler_ia32.cc

Index: runtime/vm/assembler_ia32.cc
diff --git a/runtime/vm/assembler_ia32.cc b/runtime/vm/assembler_ia32.cc
index 219ae742ffbd7f40a841db3fad87272961138000..240c2cfc7d0cf2d8d44562b1a0ec59921f1007cc 100644
--- a/runtime/vm/assembler_ia32.cc
+++ b/runtime/vm/assembler_ia32.cc
@@ -426,6 +426,14 @@ void Assembler::movsd(XmmRegister dst, XmmRegister src) {
 }
 
 
+void Assembler::movaps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x28);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
 void Assembler::addsd(XmmRegister dst, XmmRegister src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF2);
@@ -1790,6 +1798,17 @@ const char* Assembler::RegisterName(Register reg) {
 }
 
 
+static const char* xmm_reg_names[kNumberOfXmmRegisters] = {
+  "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7"
+};
+
+
+const char* Assembler::XmmRegisterName(XmmRegister reg) {
+  ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
+  return xmm_reg_names[reg];
+}
+
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32