Add a parent environment to HEnvironment.

This code has no functionality change. It adds a placeholder
for chaining inlined frames.

Change-Id: I5ec57335af76ee406052345b947aad98a6a4423a

1 files changed, 14 insertions, 9 deletions

diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index ca9cbc3d01..7130127136 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -211,17 +211,22 @@ class HGraphVisualizerPrinter : public HGraphVisitor {
       output_ << "]";
     }
     if (instruction->HasEnvironment()) {
-      HEnvironment* env = instruction->GetEnvironment();
-      output_ << " (env: [ ";
-      for (size_t i = 0, e = env->Size(); i < e; ++i) {
-        HInstruction* insn = env->GetInstructionAt(i);
-        if (insn != nullptr) {
-          output_ << GetTypeId(insn->GetType()) << insn->GetId() << " ";
-        } else {
-          output_ << " _ ";
+      output_ << " (env:";
+      for (HEnvironment* environment = instruction->GetEnvironment();
+           environment != nullptr;
+           environment = environment->GetParent()) {
+        output_ << " [ ";
+        for (size_t i = 0, e = environment->Size(); i < e; ++i) {
+          HInstruction* insn = environment->GetInstructionAt(i);
+          if (insn != nullptr) {
+            output_ << GetTypeId(insn->GetType()) << insn->GetId() << " ";
+          } else {
+            output_ << " _ ";
+          }
         }
+        output_ << "]";
       }
-      output_ << "])";
+      output_ << ")";
     }
     if (IsPass(SsaLivenessAnalysis::kLivenessPassName)
         && is_after_pass_