Try to avoid checks for lazy initialization when recompiling.

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index a55f175331093bbc61b0577e7202ad01a39f4fa6..c15253ed4b08f1041e3cda035b17fa3441f6f8c6 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -1754,6 +1754,11 @@ LocationSummary* LoadStaticFieldInstr::MakeLocationSummary() const {
 }
 
 
+// When the parser is building an implicit static getter for optimization,
+// it can generate a function body where deoptimization ids do not line up
+// with the unoptimized code.
+//
+// This is safe only so long as LoadStaticFieldInstr cannot deoptimize.
 void LoadStaticFieldInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register field = locs()->in(0).reg();
   Register result = locs()->out().reg();