diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 9a7dfd8..35944ec 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -4530,8 +4530,10 @@
 
 class HNullCheck : public HExpression<1> {
  public:
+  // `HNullCheck` can trigger GC, as it may call the `NullPointerException`
+  // constructor.
   HNullCheck(HInstruction* value, uint32_t dex_pc)
-      : HExpression(value->GetType(), SideEffects::None(), dex_pc) {
+      : HExpression(value->GetType(), SideEffects::CanTriggerGC(), dex_pc) {
     SetRawInputAt(0, value);
   }
 
@@ -4852,8 +4854,10 @@
 
 class HBoundsCheck : public HExpression<2> {
  public:
+  // `HBoundsCheck` can trigger GC, as it may call the `IndexOutOfBoundsException`
+  // constructor.
   HBoundsCheck(HInstruction* index, HInstruction* length, uint32_t dex_pc)
-      : HExpression(index->GetType(), SideEffects::None(), dex_pc) {
+      : HExpression(index->GetType(), SideEffects::CanTriggerGC(), dex_pc) {
     DCHECK(index->GetType() == Primitive::kPrimInt);
     SetRawInputAt(0, index);
     SetRawInputAt(1, length);
diff --git a/compiler/optimizing/register_allocator.cc b/compiler/optimizing/register_allocator.cc
index 9a06d9b..eb0419b 100644
--- a/compiler/optimizing/register_allocator.cc
+++ b/compiler/optimizing/register_allocator.cc
@@ -1677,7 +1677,9 @@
 
       LocationSummary* locations = safepoint_position->GetLocations();
       if ((current->GetType() == Primitive::kPrimNot) && current->GetParent()->HasSpillSlot()) {
-        DCHECK(interval->GetDefinedBy()->IsActualObject()) << interval->GetDefinedBy()->DebugName();
+        DCHECK(interval->GetDefinedBy()->IsActualObject())
+            << interval->GetDefinedBy()->DebugName()
+            << "@" << safepoint_position->GetInstruction()->DebugName();
         locations->SetStackBit(current->GetParent()->GetSpillSlot() / kVRegSize);
       }
 
@@ -1691,7 +1693,8 @@
           }
           if (current->GetType() == Primitive::kPrimNot) {
             DCHECK(interval->GetDefinedBy()->IsActualObject())
-                << interval->GetDefinedBy()->DebugName();
+                << interval->GetDefinedBy()->DebugName()
+                << "@" << safepoint_position->GetInstruction()->DebugName();
             locations->SetRegisterBit(source.reg());
           }
           break;