Enable code optimization on ARM.

runtime/vm/stub_code_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"
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 273 matching lines @@
   // Push space for the return value.
   // Push the receiver.
   // Push IC data object.
   // Push arguments descriptor array.
   __ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
   __ PushList((1 << R4) | (1 << R5) | (1 << R6) | (1 << IP));
 
   // R2: Smi-tagged arguments array length.
   PushArgumentsArray(assembler);
 
-  // Stack:
-  // TOS + 0: argument array.
-  // TOS + 1: arguments descriptor array.
-  // TOS + 2: IC data object.
-  // TOS + 3: Receiver.
-  // TOS + 4: place for result from the call.
-  // TOS + 5: saved FP of previous frame.
-  // TOS + 6: dart code return address
-  // TOS + 7: pc marker (0 for stub).
-  // TOS + 8: last argument of caller.
-  // ....
   __ CallRuntime(kInstanceFunctionLookupRuntimeEntry);
+
   // Remove arguments.
   __ Drop(4);
   __ Pop(R0);  // Get result into R0.
   __ LeaveStubFrame();
   __ Ret();
 }
 
 
 DECLARE_LEAF_RUNTIME_ENTRY(intptr_t, DeoptimizeCopyFrame,
                            intptr_t deopt_reason,
@@ skipping 23 matching lines @@
 //   +------------------+
 //   | PC marker        |
 //   +------------------+
 //   | ...              | <- SP of optimized frame
 //
 // Parts of the code cannot GC, part of the code can GC.
 static void GenerateDeoptimizationSequence(Assembler* assembler,
                                            bool preserve_result) {
   // DeoptimizeCopyFrame expects a Dart frame, i.e. EnterDartFrame(0), but there
   // is no need to set the correct PC marker or load PP, since they get patched.
-  __ EnterFrame((1 << PP) | (1 << FP) | (1 << LR) | (1 << PC), 0);
+  __ mov(IP, ShifterOperand(LR));
+  __ mov(LR, ShifterOperand(0));
+  __ EnterFrame((1 << PP) | (1 << FP) | (1 << IP) | (1 << LR), 0);
   // The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
   // and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
   const intptr_t saved_result_slot_from_fp =
       kFirstLocalSlotFromFp + 1 - (kNumberOfCpuRegisters - R0);
   // Result in R0 is preserved as part of pushing all registers below.
 
   // TODO(regis): Should we align the stack before pushing the fpu registers?
   // If we do, saved_r0_offset_from_fp is not constant anymore.
 
   // Push registers in their enumeration order: lowest register number at
@@ skipping 10 matching lines @@
   if (preserve_result) {
     // Restore result into R1 temporarily.
     __ ldr(R1, Address(FP, saved_result_slot_from_fp * kWordSize));
   }
 
   __ LeaveDartFrame();
   __ sub(SP, FP, ShifterOperand(R0));
 
   // DeoptimizeFillFrame expects a Dart frame, i.e. EnterDartFrame(0), but there
   // is no need to set the correct PC marker or load PP, since they get patched.
-  __ EnterFrame((1 << PP) | (1 << FP) | (1 << LR) | (1 << PC), 0);
+  __ mov(IP, ShifterOperand(LR));
+  __ mov(LR, ShifterOperand(0));
+  __ EnterFrame((1 << PP) | (1 << FP) | (1 << IP) | (1 << LR), 0);
   __ mov(R0, ShifterOperand(FP));  // Get last FP address.
   if (preserve_result) {
     __ Push(R1);  // Preserve result as first local.
   }
   __ ReserveAlignedFrameSpace(0);
   __ CallRuntime(kDeoptimizeFillFrameRuntimeEntry);  // Pass last FP in R0.
   if (preserve_result) {
     // Restore result into R1.
     __ ldr(R1, Address(FP, kFirstLocalSlotFromFp * kWordSize));
   }
@@ skipping 29 matching lines @@
   GenerateDeoptimizationSequence(assembler, true);  // Preserve R0.
 }
 
 
 void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
   GenerateDeoptimizationSequence(assembler, false);  // Don't preserve R0.
 }
 
 
 void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
-  __ Unimplemented("MegamorphicMiss stub");
+  __ EnterStubFrame();
+
+  // Load the receiver.
+  __ ldr(R2, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
+  __ add(IP, FP, ShifterOperand(R2, LSL, 1));  // R2 is Smi.
+  __ ldr(R6, Address(IP, kParamEndSlotFromFp * kWordSize));
+
+  // Preserve IC data and arguments descriptor.
+  __ PushList((1 << R4) | (1 << R5));
+
+  // Push space for the return value.
+  // Push the receiver.
+  // Push IC data object.
+  // Push arguments descriptor array.
+  __ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
+  __ PushList((1 << R4) | (1 << R5) | (1 << R6) | (1 << IP));
+
+  // R2: Smi-tagged arguments array length.
+  PushArgumentsArray(assembler);
+
+  __ CallRuntime(kMegamorphicCacheMissHandlerRuntimeEntry);
+  // Remove arguments.
+  __ Drop(4);
+  __ Pop(R0);  // Get result into R0.
+
+  // Restore IC data and arguments descriptor.
+  __ PopList((1 << R4) | (1 << R5));
+
+  __ LeaveStubFrame();
+
+  __ CompareImmediate(R0, reinterpret_cast<intptr_t>(Object::null()));
+  __ Branch(&StubCode::InstanceFunctionLookupLabel(), EQ);
+  __ AddImmediate(R0, Instructions::HeaderSize() - kHeapObjectTag);
+  __ bx(R0);
 }
 
 
 // Called for inline allocation of arrays.
 // Input parameters:
 //   LR: return address.
 //   R2: array length as Smi.
 //   R1: array element type (either NULL or an instantiated type).
 // NOTE: R2 cannot be clobbered here as the caller relies on it being saved.
 // The newly allocated object is returned in R0.
@@ skipping 197 matching lines @@
   // calling into the runtime.
   __ EnterStubFrame();
 
   // Setup space on stack for result from error reporting.
   __ PushList((1 << R4) | (1 << R8));  // Arguments descriptor and raw null.
 
   // Load smi-tagged arguments array length, including the non-closure.
   __ ldr(R2, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
   PushArgumentsArray(assembler);
 
-  // Stack:
-  // TOS + 0: argument array.
-  // TOS + 1: arguments descriptor array.
-  // TOS + 2: place for result from the call.
-  // TOS + 3: saved FP of previous frame.
-  // TOS + 4: dart code return address
-  // TOS + 5: pc marker (0 for stub).
-  // TOS + 6: last argument of caller.
-  // ....
   __ CallRuntime(kInvokeNonClosureRuntimeEntry);
   // Remove arguments.
   __ Drop(2);
   __ Pop(R0);  // Get result into R0.
 
   // Remove the stub frame as we are about to return.
   __ LeaveStubFrame();
   __ Ret();
 }
 
@@ skipping 593 matching lines @@
   }
   __ Drop(1);  // Pop function object.
   __ Pop(R0);
   // R0: new object
   // Restore the frame pointer.
   __ LeaveStubFrame(true);
   __ Ret();
 }
 
 
+// The target function was not found, so invoke method
+// "dynamic noSuchMethod(Invocation invocation)".
+//  R5: inline cache data object.
+//  R4: arguments descriptor array.
 void StubCode::GenerateCallNoSuchMethodFunctionStub(Assembler* assembler) {
-  __ Unimplemented("CallNoSuchMethodFunction stub");
+  __ EnterStubFrame();
+
+  // Load the receiver.
+  __ ldr(R2, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
+  __ add(IP, FP, ShifterOperand(R2, LSL, 1));  // R2 is Smi.
+  __ ldr(R6, Address(IP, kParamEndSlotFromFp * kWordSize));
+
+  // Push space for the return value.
+  // Push the receiver.
+  // Push IC data object.
+  // Push arguments descriptor array.
+  __ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
+  __ PushList((1 << R4) | (1 << R5) | (1 << R6) | (1 << IP));
+
+  // R2: Smi-tagged arguments array length.
+  PushArgumentsArray(assembler);
+
+  __ CallRuntime(kInvokeNoSuchMethodFunctionRuntimeEntry);
+  // Remove arguments.
+  __ Drop(4);
+  __ Pop(R0);  // Get result into R0.
+  __ LeaveStubFrame();
+  __ Ret();
 }
 
 
 //  R6: function object.
 //  R5: inline cache data object.
 //  R4: arguments descriptor array.
 void StubCode::GenerateOptimizedUsageCounterIncrement(Assembler* assembler) {
   Register ic_reg = R5;
   Register func_reg = R6;
   if (FLAG_trace_optimized_ic_calls) {
@@ skipping 665 matching lines @@
   __ Bind(&reference_compare);
   __ cmp(left, ShifterOperand(right));
   __ Bind(&done);
   __ PopList((1 << R0) | (1 << R1) | (1 << R2));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM