[turbofan] Factor out platform-independent part of InstructionSelector::VisitCall.

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

Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index 5bb40cee4464c4b40d3bbe7cefcee3a1d641a353..7bac111f7d1341d9efad84d620e5c4401e2742eb 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -1416,26 +1416,13 @@ void InstructionSelector::VisitFloat64RoundTiesAway(Node* node) {
 }
 
 
-void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
+void InstructionSelector::EmitPrepareArguments(NodeVector* arguments,
+                                               const CallDescriptor* descriptor,
+                                               Node* node) {
   Arm64OperandGenerator g(this);
-  const CallDescriptor* descriptor = OpParameter<const CallDescriptor*>(node);
-
-  FrameStateDescriptor* frame_state_descriptor = nullptr;
-  if (descriptor->NeedsFrameState()) {
-    frame_state_descriptor = GetFrameStateDescriptor(
-        node->InputAt(static_cast<int>(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(node, &buffer, true, true);
 
   // Push the arguments to the stack.
-  int aligned_push_count = static_cast<int>(buffer.pushed_nodes.size());
+  int aligned_push_count = static_cast<int>(arguments->size());
   bool pushed_count_uneven = aligned_push_count & 1;
   // TODO(dcarney): claim and poke probably take small immediates,
   //                loop here or whatever.
@@ -1450,56 +1437,17 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
     int slot = aligned_push_count - 1;
     // Emit the uneven pushes.
     if (pushed_count_uneven) {
-      Node* input = buffer.pushed_nodes[slot];
+      Node* input = (*arguments)[slot];
       Emit(kArm64Poke, g.NoOutput(), g.UseRegister(input),
            g.TempImmediate(slot));
       slot--;
     }
     // Now all pushes can be done in pairs.
     for (; slot >= 0; slot -= 2) {
-      Emit(kArm64PokePair, g.NoOutput(),
-           g.UseRegister(buffer.pushed_nodes[slot]),
-           g.UseRegister(buffer.pushed_nodes[slot - 1]),
-           g.TempImmediate(slot));
-    }
-  }
-
-  // Pass label of exception handler block.
-  CallDescriptor::Flags flags = descriptor->flags();
-  if (handler != nullptr) {
-    DCHECK_EQ(IrOpcode::kIfException, handler->front()->opcode());
-    IfExceptionHint hint = OpParameter<IfExceptionHint>(handler->front());
-    if (hint == IfExceptionHint::kLocallyCaught) {
-      flags |= CallDescriptor::kHasLocalCatchHandler;
+      Emit(kArm64PokePair, g.NoOutput(), g.UseRegister((*arguments)[slot]),
+           g.UseRegister((*arguments)[slot - 1]), g.TempImmediate(slot));
     }
-    flags |= CallDescriptor::kHasExceptionHandler;
-    buffer.instruction_args.push_back(g.Label(handler));
-  }
-
-  // Select the appropriate opcode based on the call type.
-  InstructionCode opcode = kArchNop;
-  switch (descriptor->kind()) {
-    case CallDescriptor::kCallAddress:
-      opcode =
-          kArchCallCFunction |
-          MiscField::encode(static_cast<int>(descriptor->CParameterCount()));
-      break;
-    case CallDescriptor::kCallCodeObject:
-      opcode = kArchCallCodeObject | MiscField::encode(flags);
-      break;
-    case CallDescriptor::kCallJSFunction:
-      opcode = kArchCallJSFunction | MiscField::encode(flags);
-      break;
-    case CallDescriptor::kLazyBailout:
-      opcode = kArchLazyBailout | MiscField::encode(flags);
-      break;
   }
-
-  // Emit the call instruction.
-  size_t const output_count = buffer.outputs.size();
-  auto* outputs = output_count ? &buffer.outputs.front() : nullptr;
-  Emit(opcode, output_count, outputs, buffer.instruction_args.size(),
-       &buffer.instruction_args.front())->MarkAsCall();
 }