Improve debugging in art/compiler/optimizing/common_arm64.h.

Change-Id: I44ff2cb64c1fd45390ed4a6517af2488fdbdaf41
diff --git a/compiler/optimizing/common_arm64.h b/compiler/optimizing/common_arm64.h
index 6c55194..6412b24 100644
--- a/compiler/optimizing/common_arm64.h
+++ b/compiler/optimizing/common_arm64.h
@@ -53,17 +53,17 @@
 }
 
 static inline vixl::Register XRegisterFrom(Location location) {
-  DCHECK(location.IsRegister());
+  DCHECK(location.IsRegister()) << location;
   return vixl::Register::XRegFromCode(VIXLRegCodeFromART(location.reg()));
 }
 
 static inline vixl::Register WRegisterFrom(Location location) {
-  DCHECK(location.IsRegister());
+  DCHECK(location.IsRegister()) << location;
   return vixl::Register::WRegFromCode(VIXLRegCodeFromART(location.reg()));
 }
 
 static inline vixl::Register RegisterFrom(Location location, Primitive::Type type) {
-  DCHECK(type != Primitive::kPrimVoid && !Primitive::IsFloatingPointType(type));
+  DCHECK(type != Primitive::kPrimVoid && !Primitive::IsFloatingPointType(type)) << type;
   return type == Primitive::kPrimLong ? XRegisterFrom(location) : WRegisterFrom(location);
 }
 
@@ -77,17 +77,17 @@
 }
 
 static inline vixl::FPRegister DRegisterFrom(Location location) {
-  DCHECK(location.IsFpuRegister());
+  DCHECK(location.IsFpuRegister()) << location;
   return vixl::FPRegister::DRegFromCode(location.reg());
 }
 
 static inline vixl::FPRegister SRegisterFrom(Location location) {
-  DCHECK(location.IsFpuRegister());
+  DCHECK(location.IsFpuRegister()) << location;
   return vixl::FPRegister::SRegFromCode(location.reg());
 }
 
 static inline vixl::FPRegister FPRegisterFrom(Location location, Primitive::Type type) {
-  DCHECK(Primitive::IsFloatingPointType(type));
+  DCHECK(Primitive::IsFloatingPointType(type)) << type;
   return type == Primitive::kPrimDouble ? DRegisterFrom(location) : SRegisterFrom(location);
 }
 
@@ -124,7 +124,7 @@
   } else if (instr->IsNullConstant()) {
     return 0;
   } else {
-    DCHECK(instr->IsLongConstant());
+    DCHECK(instr->IsLongConstant()) << instr->DebugName();
     return instr->AsLongConstant()->GetValue();
   }
 }