[crankshaft] Reland "Only exclude explicit 'arguments' (and 'this') from liveness analysis."

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 7450ab17413df92ccd3f684f45ebcf2efa5869fd..f8c8cad16416abf6ae4a23b57f4ca91097d1b50b 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -7938,6 +7938,11 @@ bool HOptimizedGraphBuilder::TryArgumentsAccess(Property* expr) {
       return false;
     }
 
+    // Make sure we visit the arguments object so that the liveness analysis
+    // still records the access.
+    CHECK_ALIVE_OR_RETURN(VisitForValue(expr->obj(), ARGUMENTS_ALLOWED), true);
+    Drop(1);
+
     if (function_state()->outer() == NULL) {
       HInstruction* elements = Add<HArgumentsElements>(false);
       result = New<HArgumentsLength>(elements);