not-int can also take non-int (byte and short) instructions.

So we should use the result-type instead if the input type
for knowning what instruction to use.

Bug: 19454010
Change-Id: I88782ad27ae8c8e1b7868afede5057d26f14685a
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 41a19e1..74adb31 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -2514,7 +2514,7 @@
   DCHECK_EQ(locations->InAt(0).AsRegister<CpuRegister>().AsRegister(),
             locations->Out().AsRegister<CpuRegister>().AsRegister());
   Location out = locations->Out();
-  switch (not_->InputAt(0)->GetType()) {
+  switch (not_->GetResultType()) {
     case Primitive::kPrimInt:
       __ notl(out.AsRegister<CpuRegister>());
       break;