Initial support for debugger frame state in Turbofan.

src/compiler/arm64/instruction-selector-arm64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 578 matching lines @@
   Node* right = node->InputAt(1);
   VisitCompare(this, kArm64Float64Cmp, g.UseDoubleRegister(left),
                g.UseDoubleRegister(right), cont);
 }
 
 
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {
   Arm64OperandGenerator g(this);
   CallDescriptor* descriptor = OpParameter<CallDescriptor*>(call);
-  CallBuffer buffer(zone(), descriptor);  // TODO(turbofan): temp zone here?
+
+  FrameStateDescriptor* frame_state_descriptor = NULL;
+  if (descriptor->NeedsFrameState()) {
+    frame_state_descriptor =
+        GetFrameStateDescriptor(call->InputAt(descriptor->InputCount()));
+  }
+
+  CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
 
   // Compute InstructionOperands for inputs and outputs.
   // TODO(turbofan): on ARM64 it's probably better to use the code object in a
   // register if there are multiple uses of it. Improve constant pool and the
   // heuristics in the register allocator for where to emit constants.
   InitializeCallBuffer(call, &buffer, true, false, continuation,
                        deoptimization);
 
   // Push the arguments to the stack.
   bool is_c_frame = descriptor->kind() == CallDescriptor::kCallAddress;
-  bool pushed_count_uneven = buffer.pushed_count & 1;
-  int aligned_push_count = buffer.pushed_count;
+  bool pushed_count_uneven = buffer.pushed_nodes.size() & 1;
+  int aligned_push_count = buffer.pushed_nodes.size();
   if (is_c_frame && pushed_count_uneven) {
     aligned_push_count++;
   }
   // TODO(dcarney): claim and poke probably take small immediates,
   //                loop here or whatever.
   // Bump the stack pointer(s).
   if (aligned_push_count > 0) {
     // TODO(dcarney): it would be better to bump the csp here only
     //                and emit paired stores with increment for non c frames.
     Emit(kArm64Claim | MiscField::encode(aligned_push_count), NULL);
   }
   // Move arguments to the stack.
   {
-    int slot = buffer.pushed_count - 1;
+    int slot = buffer.pushed_nodes.size() - 1;
     // Emit the uneven pushes.
     if (pushed_count_uneven) {
       Node* input = buffer.pushed_nodes[slot];
       ArchOpcode opcode = is_c_frame ? kArm64PokePairZero : kArm64Poke;
       Emit(opcode | MiscField::encode(slot), NULL, g.UseRegister(input));
       slot--;
     }
     // Now all pushes can be done in pairs.
     for (; slot >= 0; slot -= 2) {
       Emit(kArm64PokePair | MiscField::encode(slot), NULL,
            g.UseRegister(buffer.pushed_nodes[slot]),
            g.UseRegister(buffer.pushed_nodes[slot - 1]));
     }
   }
 
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
     case CallDescriptor::kCallCodeObject: {
-      bool lazy_deopt = descriptor->CanLazilyDeoptimize();
-      opcode = kArm64CallCodeObject | MiscField::encode(lazy_deopt ? 1 : 0);
+      opcode = kArm64CallCodeObject;
       break;
     }
     case CallDescriptor::kCallAddress:
       opcode = kArm64CallAddress;
       break;
     case CallDescriptor::kCallJSFunction:
       opcode = kArm64CallJSFunction;
       break;
     default:
       UNREACHABLE();
       return;
   }
+  opcode |= MiscField::encode(descriptor->deoptimization_support());
 
   // Emit the call instruction.
   Instruction* call_instr =
-      Emit(opcode, buffer.output_count, buffer.outputs,
-           buffer.fixed_and_control_count(), buffer.fixed_and_control_args);
+      Emit(opcode, buffer.outputs.size(), &buffer.outputs.front(),
+           buffer.instruction_args.size(), &buffer.instruction_args.front());
 
   call_instr->MarkAsCall();
   if (deoptimization != NULL) {
     DCHECK(continuation != NULL);
     call_instr->MarkAsControl();
   }
 
   // Caller clean up of stack for C-style calls.
   if (is_c_frame && aligned_push_count > 0) {
     DCHECK(deoptimization == NULL && continuation == NULL);
     Emit(kArm64Drop | MiscField::encode(aligned_push_count), NULL);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8