Teach TurboFan to call C functions with result_size > 1.

Happily, this fixes WIN64 failures too.

BUG=
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/709033002

Cr-Commit-Position: refs/heads/master@{#25216}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25216 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/js-generic-lowering.cc

@@ -223,7 +223,7 @@ void JSGenericLowering::ReplaceWithRuntimeCall(Node* node,
       linkage()->GetRuntimeCallDescriptor(f, nargs, properties);
   Node* ref = ExternalConstant(ExternalReference(f, isolate()));
   Node* arity = Int32Constant(nargs);
-  PatchInsertInput(node, 0, jsgraph()->CEntryStubConstant());
+  PatchInsertInput(node, 0, jsgraph()->CEntryStubConstant(fun->result_size));
   PatchInsertInput(node, nargs + 1, ref);
   PatchInsertInput(node, nargs + 2, arity);
   PatchOperator(node, common()->Call(desc));

src/compiler/js-graph.cc

@@ -17,12 +17,16 @@ Node* JSGraph::ImmovableHeapConstant(Handle<HeapObject> object) {
 }
 
 
-Node* JSGraph::CEntryStubConstant() {
-  if (!c_entry_stub_constant_.is_set()) {
-    c_entry_stub_constant_.set(
-        ImmovableHeapConstant(CEntryStub(isolate(), 1).GetCode()));
+Node* JSGraph::CEntryStubConstant(int result_size) {
+  if (result_size == 1) {
+    if (!c_entry_stub_constant_.is_set()) {
+      c_entry_stub_constant_.set(
+          ImmovableHeapConstant(CEntryStub(isolate(), 1).GetCode()));
+    }
+    return c_entry_stub_constant_.get();
   }
-  return c_entry_stub_constant_.get();
+
+  return ImmovableHeapConstant(CEntryStub(isolate(), result_size).GetCode());
 }
 
 

src/compiler/js-graph.h

@@ -32,7 +32,7 @@ class JSGraph : public ZoneObject {
         cache_(zone()) {}
 
   // Canonicalized global constants.
-  Node* CEntryStubConstant();
+  Node* CEntryStubConstant(int result_size);
   Node* UndefinedConstant();
   Node* TheHoleConstant();
   Node* TrueConstant();