CHA guard optimization (elimination/hoisting).

Test: manual by checking the dump-cfg output.

Change-Id: I254e168b9a85d2d3d23e02eea7e129c1bc9ab920
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 0d0f62a..4bf5b08 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -54,6 +54,7 @@
 #include "base/timing_logger.h"
 #include "bounds_check_elimination.h"
 #include "builder.h"
+#include "cha_guard_optimization.h"
 #include "code_generator.h"
 #include "compiled_method.h"
 #include "compiler.h"
@@ -517,6 +518,8 @@
     return new (arena) SideEffectsAnalysis(graph);
   } else if (opt_name == HLoopOptimization::kLoopOptimizationPassName) {
     return new (arena) HLoopOptimization(graph, most_recent_induction);
+  } else if (opt_name == CHAGuardOptimization::kCHAGuardOptimizationPassName) {
+    return new (arena) CHAGuardOptimization(graph);
 #ifdef ART_ENABLE_CODEGEN_arm
   } else if (opt_name == arm::DexCacheArrayFixups::kDexCacheArrayFixupsArmPassName) {
     return new (arena) arm::DexCacheArrayFixups(graph, codegen, stats);
@@ -779,6 +782,7 @@
   InstructionSimplifier* simplify4 = new (arena) InstructionSimplifier(
       graph, stats, "instruction_simplifier$before_codegen");
   IntrinsicsRecognizer* intrinsics = new (arena) IntrinsicsRecognizer(graph, stats);
+  CHAGuardOptimization* cha_guard = new (arena) CHAGuardOptimization(graph);
 
   HOptimization* optimizations1[] = {
     intrinsics,
@@ -807,6 +811,7 @@
     fold3,  // evaluates code generated by dynamic bce
     simplify3,
     lse,
+    cha_guard,
     dce3,
     // The codegen has a few assumptions that only the instruction simplifier
     // can satisfy. For example, the code generator does not expect to see a