DCE SimplifyAlwaysThrowing optimizations

We can do two optimizations to this method:
  1) If we have a try catch in the graph, we now allow to simplify
     always throwing instructions to point them directly to the exit
     block.
  2) We now allow to simplify always throwing instruction for
     non-trivial basic blocks i.e. not just Invoke and a Goto. We
     still require that the second to last instruction is an always
     throwing invoke followed by a Goto.

Bug: 227316307
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: I8208163e48b07d8a1bb77e11763516f65fb88827

1 files changed, 6 insertions, 4 deletions

diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index 716fee4d3e..4a6ee13005 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -586,6 +586,10 @@ class HGraphVisualizerPrinter : public HGraphDelegateVisitor {
     StartAttributeStream("kind") << (try_boundary->IsEntry() ? "entry" : "exit");
   }
 
+  void VisitGoto(HGoto* instruction) override {
+    StartAttributeStream("target") << namer_.GetName(instruction->GetBlock()->GetSingleSuccessor());
+  }
+
   void VisitDeoptimize(HDeoptimize* deoptimize) override {
     StartAttributeStream("kind") << deoptimize->GetKind();
   }
@@ -657,10 +661,8 @@ class HGraphVisualizerPrinter : public HGraphDelegateVisitor {
       StartAttributeStream("dex_pc") << "n/a";
     }
     HBasicBlock* block = instruction->GetBlock();
-    if (IsPass(kDebugDumpName)) {
-      // Include block name for logcat use.
-      StartAttributeStream("block") << namer_.GetName(block);
-    }
+    StartAttributeStream("block") << namer_.GetName(block);
+
     instruction->Accept(this);
     if (instruction->HasEnvironment()) {
       StringList envs;