[x86] Avoid memory form of PUSH/CALL for ATOM.

src/compiler/ia32/instruction-selector-ia32.cc

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index e3a824618dca0f67da43248c4b4e7440610c4fe9..7b6b721a376e5441ed704ecf9c9922324de9d328 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -737,8 +737,11 @@ void InstructionSelector::VisitCall(Node* node) {
   for (auto i = buffer.pushed_nodes.rbegin(); i != buffer.pushed_nodes.rend();
        ++i) {
     // TODO(titzer): handle pushing double parameters.
-    Emit(kIA32Push, nullptr,
-         g.CanBeImmediate(*i) ? g.UseImmediate(*i) : g.Use(*i));
+    InstructionOperand* value =
+        g.CanBeImmediate(*i) ? g.UseImmediate(*i) : IsSupported(ATOM)
+                                                        ? g.UseRegister(*i)
+                                                        : g.Use(*i);
+    Emit(kIA32Push, nullptr, value);
   }
 
   // Select the appropriate opcode based on the call type.