Generate some intrinsics using our IR.

runtime/vm/intermediate_language_ia32.cc

Index: runtime/vm/intermediate_language_ia32.cc
===================================================================
--- runtime/vm/intermediate_language_ia32.cc	(revision 39651)
+++ runtime/vm/intermediate_language_ia32.cc	(working copy)
@@ -84,6 +84,13 @@
 void ReturnInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register result = locs()->in(0).reg();
   ASSERT(result == EAX);
+
+  if (is_intrinsic_) {
+    // Intrinsics don't have a frame.
+    __ ret();
+    return;
+  }
+
 #if defined(DEBUG)
   __ Comment("Stack Check");
   Label done;
@@ -930,7 +937,7 @@
   const intptr_t kNumInputs = 1;
   return LocationSummary::Make(isolate,
                                kNumInputs,
-                               Location::RequiresRegister(),
+                               Location::SameAsFirstInput(),
                                LocationSummary::kNoCall);
 }