Liveness analysis for environment slots in Hydrogen

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index e1bb69eacd73fc5ac3f672abee2436ea973dc9a3..1d4d06bd74578f8bc8235484796ca8075854bb06 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -699,6 +699,12 @@ LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) {
+  UNREACHABLE();
+  return NULL;
+}
+
+
 LInstruction* LChunkBuilder::DoSoftDeoptimize(HSoftDeoptimize* instr) {
   return AssignEnvironment(new(zone()) LDeoptimize);
 }