Add --noopt flag that sets all kind of flags to make unoptimzied code as fast as possible (and not …

runtime/vm/flow_graph_compiler_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1314 matching lines @@
   __ add(IP, R2, Operand(R3, LSL, 2));
   __ ldr(R0, FieldAddress(IP, base + kWordSize));
   __ ldr(R1, FieldAddress(R0, Function::instructions_offset()));
   __ LoadObject(R5, ic_data);
   __ LoadObject(R4, arguments_descriptor);
   __ AddImmediate(R1, Instructions::HeaderSize() - kHeapObjectTag);
   __ blx(R1);
   AddCurrentDescriptor(RawPcDescriptors::kOther,
       Isolate::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
-  AddDeoptIndexAtCall(Isolate::ToDeoptAfter(deopt_id), token_pos);
+  const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id);
+  if (is_optimizing()) {
+    AddDeoptIndexAtCall(deopt_id_after, token_pos);
+  } else {
+    // Add deoptimization continuation point after the call and before the
+    // arguments are removed.
+    AddCurrentDescriptor(RawPcDescriptors::kDeopt,
+        deopt_id_after, token_pos);
+  }
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitUnoptimizedStaticCall(
     intptr_t argument_count,
     intptr_t deopt_id,
     intptr_t token_pos,
     LocationSummary* locs,
     const ICData& ic_data) {
@@ skipping 529 matching lines @@
   DRegister dreg = EvenDRegisterOf(reg);
   __ vldrd(dreg, Address(SP, kDoubleSize, Address::PostIndex));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM