PPC/s390: Remove CONST_LEGACY VariableMode

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 4b1dc00d3bc2a2bb2b2100d1f7ced0af002bb019..e071c1e725c9e49d9bf39fe7084334644035b76a 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -2174,10 +2174,10 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
       __ CallRuntime(Runtime::kThrowReferenceError);
       __ bind(&assign);
     }
-    if (var->mode() == CONST) {
-      __ CallRuntime(Runtime::kThrowConstAssignError);
-    } else {
+    if (var->mode() != CONST) {
       EmitStoreToStackLocalOrContextSlot(var, location);
+    } else if (var->throw_on_const_assignment(language_mode())) {
+      __ CallRuntime(Runtime::kThrowConstAssignError);
     }
   } else if (var->is_this() && var->mode() == CONST && op == Token::INIT) {
     // Initializing assignment to const {this} needs a write barrier.
@@ -2193,7 +2193,8 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
     __ bind(&uninitialized_this);
     EmitStoreToStackLocalOrContextSlot(var, location);
 
-  } else if (!var->is_const_mode() || op == Token::INIT) {
+  } else {
+    DCHECK(var->mode() != CONST || op == Token::INIT);
     if (var->IsLookupSlot()) {
       // Assignment to var.
       __ Push(var->name());
@@ -2214,12 +2215,6 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
       }
       EmitStoreToStackLocalOrContextSlot(var, location);
     }
-  } else {
-    DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT);
-    if (is_strict(language_mode())) {
-      __ CallRuntime(Runtime::kThrowConstAssignError);
-    }
-    // Silently ignore store in sloppy mode.
   }
 }