Stack overflow checks and NPE checks for optimizing.

Change-Id: I59e97448bf29778769b79b51ee4ea43f43493d96
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index e0db0f1..c0964e6 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -37,6 +37,9 @@
   block_labels_.SetSize(blocks.Size());
 
   DCHECK_EQ(frame_size_, kUninitializedFrameSize);
+  // The baseline compiler does not do graph analysis prior to generating
+  // code.
+  MarkNotLeaf();
   ComputeFrameSize(GetGraph()->GetMaximumNumberOfOutVRegs()
                    + GetGraph()->GetNumberOfLocalVRegs()
                    + GetGraph()->GetNumberOfTemporaries()