Allows "Hello, world!" to run on ARM hardware.

runtime/vm/intermediate_language_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/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 65 matching lines @@
 // that will be overwritten by the patch instructions: a branch macro sequence.
 void ReturnInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register result = locs()->in(0).reg();
   ASSERT(result == R0);
 #if defined(DEBUG)
   // TODO(srdjan): Fix for functions with finally clause.
   // A finally clause may leave a previously pushed return value if it
   // has its own return instruction. Method that have finally are currently
   // not optimized.
   if (!compiler->HasFinally()) {
+    Label stack_ok;
     __ Comment("Stack Check");
     const intptr_t fp_sp_dist =
         (kFirstLocalSlotIndex + 1 - compiler->StackSize()) * kWordSize;
     ASSERT(fp_sp_dist <= 0);
     __ sub(R2, SP, ShifterOperand(FP));
     __ CompareImmediate(R2, fp_sp_dist);
-    __ bkpt(0, NE);
+    __ b(&stack_ok, EQ);
+    __ bkpt(0);
+    __ Bind(&stack_ok);
   }
 #endif
   __ LeaveDartFrame();
   __ Ret();
 
   // No need to generate NOP instructions so that the debugger can patch the
   // return pattern (3 instructions) with a call to the debug stub (also 3
   // instructions).
   compiler->AddCurrentDescriptor(PcDescriptors::kReturn,
                                  Isolate::kNoDeoptId,
@@ skipping 2593 matching lines @@
                          &label,
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM