Revert a mistake in Node::CollectProjections.

Fix for a bug I introduced in r23270.

BUG=
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/500023004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23360 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/instruction-selector.cc

@@ -284,9 +284,8 @@ void InstructionSelector::InitializeCallBuffer(Node* call, CallBuffer* buffer,
     if (buffer->descriptor->ReturnCount() == 1) {
       buffer->output_nodes.push_back(call);
     } else {
+      buffer->output_nodes.resize(buffer->descriptor->ReturnCount(), NULL);
       call->CollectProjections(&buffer->output_nodes);
-      DCHECK(buffer->output_nodes.size() <=
-             static_cast<size_t>(buffer->descriptor->ReturnCount()));
     }
 
     // Filter out the outputs that aren't live because no projection uses them.

src/compiler/node.cc

@@ -11,10 +11,16 @@ namespace internal {
 namespace compiler {
 
 void Node::CollectProjections(NodeVector* projections) {
+  for (size_t i = 0; i < projections->size(); i++) {
+    (*projections)[i] = NULL;
+  }
   for (UseIter i = uses().begin(); i != uses().end(); ++i) {
     if ((*i)->opcode() != IrOpcode::kProjection) continue;
-    DCHECK_GE(OpParameter<int32_t>(*i), 0);
-    projections->push_back(*i);
+    int32_t index = OpParameter<int32_t>(*i);
+    DCHECK_GE(index, 0);
+    DCHECK_LT(index, projections->size());
+    DCHECK_EQ(NULL, (*projections)[index]);
+    (*projections)[index] = *i;
   }
 }