Run type propagation after inliner only when needed.

Currently we run a type propagation pass unconditionally after the
inliner. This change looks at the returned value (if any) and runs a
minimal type propagation only if its type has changed.

Change-Id: I0dd72bd481219081e8a978d2632426afc980d73a
diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index 4111671..264c94e 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -24,6 +24,7 @@
 #include "code_generator.h"
 #include "dead_code_elimination.h"
 #include "disassembler.h"
+#include "inliner.h"
 #include "licm.h"
 #include "nodes.h"
 #include "optimization.h"
@@ -424,11 +425,6 @@
     return strcmp(pass_name_, name) == 0;
   }
 
-  bool IsReferenceTypePropagationPass() {
-    return strstr(pass_name_, ReferenceTypePropagation::kReferenceTypePropagationPassName)
-        != nullptr;
-  }
-
   void PrintInstruction(HInstruction* instruction) {
     output_ << instruction->DebugName();
     if (instruction->InputCount() > 0) {
@@ -492,7 +488,8 @@
       } else {
         StartAttributeStream("loop") << "B" << info->GetHeader()->GetBlockId();
       }
-    } else if (IsReferenceTypePropagationPass()
+    } else if ((IsPass(ReferenceTypePropagation::kReferenceTypePropagationPassName)
+        || IsPass(HInliner::kInlinerPassName))
         && (instruction->GetType() == Primitive::kPrimNot)) {
       ReferenceTypeInfo info = instruction->IsLoadClass()
         ? instruction->AsLoadClass()->GetLoadedClassRTI()