VM: New calling convention for generated code.

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 87ca181198a8e4569450492c795f6c5a8a804080..4c61233690d2ab0dec2668ac72e54fd0a1bd0ec9 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -758,7 +758,9 @@ static bool CompileParsedFunctionHelper(CompilationPipeline* pipeline,
         if (optimized) {
           // We may not have previous code if 'always_optimize' is set.
           if ((osr_id == Isolate::kNoDeoptId) && function.HasCode()) {
-            CodePatcher::PatchEntry(Code::Handle(function.CurrentCode()));
+            CodePatcher::PatchEntry(
+                Code::Handle(function.CurrentCode()),
+                Code::Handle(StubCode::FixCallersTarget_entry()->code()));
             if (FLAG_trace_compiler || FLAG_trace_patching) {
               if (FLAG_trace_compiler) {
                 THR_Print("  ");
@@ -790,7 +792,6 @@ static bool CompileParsedFunctionHelper(CompilationPipeline* pipeline,
           }
           function.set_unoptimized_code(code);
           function.AttachCode(code);
-          ASSERT(CodePatcher::CodeIsPatchable(code));
         }
         if (parsed_function->HasDeferredPrefixes()) {
           ASSERT(!FLAG_load_deferred_eagerly);