Remove usages of alloca() according to style guide.

src/compiler/graph-builder.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/generic-graph.h"
 #include "src/compiler/generic-node.h"
 #include "src/compiler/generic-node-inl.h"
@@ skipping 31 matching lines @@
 
   Node* result = NULL;
   if (!has_context && !has_control && !has_effect) {
     result = graph()->NewNode(op, value_input_count, value_inputs);
   } else {
     int input_count_with_deps = value_input_count;
     if (has_context) ++input_count_with_deps;
     if (has_framestate) ++input_count_with_deps;
     if (has_control) ++input_count_with_deps;
     if (has_effect) ++input_count_with_deps;
-    void* raw_buffer = alloca(kPointerSize * input_count_with_deps);
-    Node** buffer = reinterpret_cast<Node**>(raw_buffer);
+    Node** buffer = zone()->NewArray<Node*>(input_count_with_deps);
     memcpy(buffer, value_inputs, kPointerSize * value_input_count);
     Node** current_input = buffer + value_input_count;
     if (has_context) {
       *current_input++ = current_context();
     }
     if (has_framestate) {
       // The frame state will be inserted later. Here we misuse
       // the dead_control node as a sentinel to be later overwritten
       // with the real frame state.
       *current_input++ = dead_control();
@@ skipping 92 matching lines @@
     Node* phi = builder_->NewPhi(1, values()->at(i), control);
     values()->at(i) = phi;
   }
   Node* effect = builder_->NewEffectPhi(1, GetEffectDependency(), control);
   UpdateEffectDependency(effect);
 }
 
 
 Node* StructuredGraphBuilder::NewPhi(int count, Node* input, Node* control) {
   Operator* phi_op = common()->Phi(count);
-  void* raw_buffer = alloca(kPointerSize * (count + 1));
-  Node** buffer = reinterpret_cast<Node**>(raw_buffer);
+  Node** buffer = zone()->NewArray<Node*>(count + 1);
   MemsetPointer(buffer, input, count);
   buffer[count] = control;
   return graph()->NewNode(phi_op, count + 1, buffer);
 }
 
 
 // TODO(mstarzinger): Revisit this once we have proper effect states.
 Node* StructuredGraphBuilder::NewEffectPhi(int count, Node* input,
                                            Node* control) {
   Operator* phi_op = common()->EffectPhi(count);
-  void* raw_buffer = alloca(kPointerSize * (count + 1));
-  Node** buffer = reinterpret_cast<Node**>(raw_buffer);
+  Node** buffer = zone()->NewArray<Node*>(count + 1);
   MemsetPointer(buffer, input, count);
   buffer[count] = control;
   return graph()->NewNode(phi_op, count + 1, buffer);
 }
 
 
 Node* StructuredGraphBuilder::MergeControl(Node* control, Node* other) {
   int inputs = OperatorProperties::GetControlInputCount(control->op()) + 1;
   if (control->opcode() == IrOpcode::kLoop) {
     // Control node for loop exists, add input.
@@ skipping 52 matching lines @@
   if (!dead_control_.is_set()) {
     Node* dead_node = graph()->NewNode(common_->Dead());
     dead_control_.set(dead_node);
     return dead_node;
   }
   return dead_control_.get();
 }
 }
 }
 }  // namespace v8::internal::compiler