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

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

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index a0bfb24cc62f1acd01e563230e62dc1b5038f349..58e4cd98ac03cd62f84b590367c4e0a20a1eb739 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -1481,23 +1481,10 @@ void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
 }
 
 
-void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
+void InstructionSelector::EmitPrepareArguments(NodeVector* arguments,
+                                               const CallDescriptor* descriptor,
+                                               Node* node) {
   PPCOperandGenerator g(this);
-  const CallDescriptor* descriptor = OpParameter<const CallDescriptor*>(node);
-
-  FrameStateDescriptor* frame_state_descriptor = nullptr;
-  if (descriptor->NeedsFrameState()) {
-    frame_state_descriptor =
-        GetFrameStateDescriptor(node->InputAt(descriptor->InputCount()));
-  }
-
-  CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
-
-  // Compute InstructionOperands for inputs and outputs.
-  // TODO(turbofan): on PPC 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);
 
   // Prepare for C function call.
   if (descriptor->IsCFunctionCall()) {
@@ -1507,7 +1494,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
 
     // Poke any stack arguments.
     int slot = kStackFrameExtraParamSlot;
-    for (Node* node : buffer.pushed_nodes) {
+    for (Node* node : (*arguments)) {
       Emit(kPPC_StoreToStackSlot, g.NoOutput(), g.UseRegister(node),
            g.TempImmediate(slot));
       ++slot;
@@ -1516,7 +1503,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
     // Push any stack arguments.
     int num_slots = static_cast<int>(descriptor->StackParameterCount());
     int slot = 0;
-    for (Node* input : buffer.pushed_nodes) {
+    for (Node* input : (*arguments)) {
       if (slot == 0) {
         DCHECK(input);
         Emit(kPPC_PushFrame, g.NoOutput(), g.UseRegister(input),
@@ -1531,43 +1518,6 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
       ++slot;
     }
   }
-
-  // Pass label of exception handler block.
-  CallDescriptor::Flags flags = descriptor->flags();
-  if (handler) {
-    DCHECK_EQ(IrOpcode::kIfException, handler->front()->opcode());
-    IfExceptionHint hint = OpParameter<IfExceptionHint>(handler->front());
-    if (hint == IfExceptionHint::kLocallyCaught) {
-      flags |= CallDescriptor::kHasLocalCatchHandler;
-    }
-    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();
 }