[turbofan] Add basic support for calling to (a subset of) C functions.

This introduces some initial building blocks for calling out to
C/C++ functions directly from TurboFan generated code objects.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1205023002.

Cr-Commit-Position: refs/heads/master@{#29279}

src/compiler/arm/code-generator-arm.cc

@@ -373,6 +373,22 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, kScratchReg);
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (instr->InputAt(0)->IsImmediate()) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
@@ -806,6 +822,12 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Push(i.InputRegister(0));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
+    case kArmPoke: {
+      int const slot = MiscField::decode(instr->opcode());
+      __ str(i.InputRegister(0), MemOperand(sp, slot * kPointerSize));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    }
     case kArmStoreWriteBarrier: {
       Register object = i.InputRegister(0);
       Register index = i.InputRegister(1);

src/compiler/arm/instruction-codes-arm.h

@@ -93,6 +93,7 @@ namespace compiler {
   V(ArmLdr)                        \
   V(ArmStr)                        \
   V(ArmPush)                       \
+  V(ArmPoke)                       \
   V(ArmStoreWriteBarrier)
 
 

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

@@ -1096,12 +1096,28 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // TODO(turbofan): on ARM 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, false);
+  InitializeCallBuffer(node, &buffer, true, true);
+
+  // Prepare for C function call.
+  if (descriptor->IsCFunctionCall()) {
+    Emit(kArchPrepareCallCFunction |
+             MiscField::encode(static_cast<int>(descriptor->CParameterCount())),
+         0, nullptr, 0, nullptr);
 
+    // Poke any stack arguments.
+    for (size_t n = 0; n < buffer.pushed_nodes.size(); ++n) {
+      if (Node* node = buffer.pushed_nodes[n]) {
+        int const slot = static_cast<int>(n);
+        InstructionOperand value = g.UseRegister(node);
+        Emit(kArmPoke | MiscField::encode(slot), g.NoOutput(), value);
+      }
+    }
+  } else {
     // Push any stack arguments.
     for (Node* node : base::Reversed(buffer.pushed_nodes)) {
       Emit(kArmPush, g.NoOutput(), g.UseRegister(node));
     }
+  }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ -1118,18 +1134,21 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
-    case CallDescriptor::kCallCodeObject: {
-      opcode = kArchCallCodeObject;
+    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;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();
       return;
   }
-  opcode |= MiscField::encode(flags);
 
   // Emit the call instruction.
   size_t const output_count = buffer.outputs.size();

src/compiler/arm/linkage-arm.cc

@@ -28,6 +28,7 @@ struct ArmLinkageHelperTraits {
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 4; }
+  static int CStackBackingStoreLength() { return 0; }
 };
 
 

src/compiler/arm64/code-generator-arm64.cc

@@ -420,6 +420,23 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Jump(x10);
       break;
     }
+    case kArchPrepareCallCFunction:
+      // We don't need kArchPrepareCallCFunction on arm64 as the instruction
+      // selector already perform a Claim to reserve space on the stack and
+      // guarantee correct alignment of stack pointer.
+      UNREACHABLE();
+      break;
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (instr->InputAt(0)->IsImmediate()) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters, 0);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters, 0);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;

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

@@ -1345,7 +1345,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // 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, false);
+  InitializeCallBuffer(node, &buffer, true, true);
 
   // Push the arguments to the stack.
   int aligned_push_count = static_cast<int>(buffer.pushed_nodes.size());
@@ -1392,18 +1392,21 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
-    case CallDescriptor::kCallCodeObject: {
-      opcode = kArchCallCodeObject;
+    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;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();
       return;
   }
-  opcode |= MiscField::encode(flags);
 
   // Emit the call instruction.
   size_t const output_count = buffer.outputs.size();

src/compiler/arm64/linkage-arm64.cc

@@ -28,6 +28,7 @@ struct Arm64LinkageHelperTraits {
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 8; }
+  static int CStackBackingStoreLength() { return 0; }
 };
 
 

src/compiler/code-generator-impl.h

@@ -57,6 +57,10 @@ class InstructionOperandConverter {
     return static_cast<uint8_t>(InputInt32(index) & 0x3F);
   }
 
+  ExternalReference InputExternalReference(size_t index) {
+    return ToExternalReference(instr_->InputAt(index));
+  }
+
   Handle<HeapObject> InputHeapObject(size_t index) {
     return ToHeapObject(instr_->InputAt(index));
   }
@@ -108,6 +112,10 @@ class InstructionOperandConverter {
 
   double ToDouble(InstructionOperand* op) { return ToConstant(op).ToFloat64(); }
 
+  ExternalReference ToExternalReference(InstructionOperand* op) {
+    return ToConstant(op).ToExternalReference();
+  }
+
   Handle<HeapObject> ToHeapObject(InstructionOperand* op) {
     return ToConstant(op).ToHeapObject();
   }

src/compiler/code-generator.cc

@@ -62,6 +62,11 @@ CodeGenerator::CodeGenerator(Frame* frame, Linkage* linkage,
 Handle<Code> CodeGenerator::GenerateCode() {
   CompilationInfo* info = this->info();
 
+  // Open a frame scope to indicate that there is a frame on the stack.  The
+  // MANUAL indicates that the scope shouldn't actually generate code to set up
+  // the frame (that is done in AssemblePrologue).
+  FrameScope frame_scope(masm(), StackFrame::MANUAL);
+
   // Emit a code line info recording start event.
   PositionsRecorder* recorder = masm()->positions_recorder();
   LOG_CODE_EVENT(isolate(), CodeStartLinePosInfoRecordEvent(recorder));

src/compiler/ia32/code-generator-ia32.cc

@@ -352,6 +352,22 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ jmp(FieldOperand(func, JSFunction::kCodeEntryOffset));
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, i.TempRegister(0));
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;
@@ -870,6 +886,15 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
         __ push(i.InputOperand(0));
       }
       break;
+    case kIA32Poke: {
+      int const slot = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        __ mov(Operand(esp, slot * kPointerSize), i.InputImmediate(0));
+      } else {
+        __ mov(Operand(esp, slot * kPointerSize), i.InputRegister(0));
+      }
+      break;
+    }
     case kIA32StoreWriteBarrier: {
       Register object = i.InputRegister(0);
       Register value = i.InputRegister(2);

src/compiler/ia32/instruction-codes-ia32.h

@@ -91,6 +91,7 @@ namespace compiler {
   V(IA32Movsd)                     \
   V(IA32Lea)                       \
   V(IA32Push)                      \
+  V(IA32Poke)                      \
   V(IA32StoreWriteBarrier)         \
   V(IA32StackCheck)
 

src/compiler/ia32/instruction-selector-ia32.cc

@@ -830,6 +830,24 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Compute InstructionOperands for inputs and outputs.
   InitializeCallBuffer(node, &buffer, true, true);
 
+  // Prepare for C function call.
+  if (descriptor->IsCFunctionCall()) {
+    InstructionOperand temps[] = {g.TempRegister()};
+    size_t const temp_count = arraysize(temps);
+    Emit(kArchPrepareCallCFunction |
+             MiscField::encode(static_cast<int>(descriptor->CParameterCount())),
+         0, nullptr, 0, nullptr, temp_count, temps);
+
+    // Poke any stack arguments.
+    for (size_t n = 0; n < buffer.pushed_nodes.size(); ++n) {
+      if (Node* node = buffer.pushed_nodes[n]) {
+        int const slot = static_cast<int>(n);
+        InstructionOperand value =
+            g.CanBeImmediate(node) ? g.UseImmediate(node) : g.UseRegister(node);
+        Emit(kIA32Poke | MiscField::encode(slot), g.NoOutput(), value);
+      }
+    }
+  } else {
     // Push any stack arguments.
     for (Node* node : base::Reversed(buffer.pushed_nodes)) {
       // TODO(titzer): handle pushing double parameters.
@@ -839,6 +857,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
               : IsSupported(ATOM) ? g.UseRegister(node) : g.Use(node);
       Emit(kIA32Push, g.NoOutput(), value);
     }
+  }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ -855,18 +874,21 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
-    case CallDescriptor::kCallCodeObject: {
-      opcode = kArchCallCodeObject;
+    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;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();
       return;
   }
-  opcode |= MiscField::encode(flags);
 
   // Emit the call instruction.
   size_t const output_count = buffer.outputs.size();

src/compiler/ia32/linkage-ia32.cc

@@ -24,6 +24,7 @@ struct IA32LinkageHelperTraits {
   }
   static Register CRegisterParameter(int i) { return no_reg; }
   static int CRegisterParametersLength() { return 0; }
+  static int CStackBackingStoreLength() { return 0; }
 };
 
 typedef LinkageHelper<IA32LinkageHelperTraits> LH;

src/compiler/instruction-codes.h

@@ -40,6 +40,8 @@ namespace compiler {
   V(ArchTailCallCodeObject)   \
   V(ArchCallJSFunction)       \
   V(ArchTailCallJSFunction)   \
+  V(ArchPrepareCallCFunction) \
+  V(ArchCallCFunction)        \
   V(ArchJmp)                  \
   V(ArchLookupSwitch)         \
   V(ArchTableSwitch)          \

src/compiler/instruction-selector.cc

@@ -336,8 +336,7 @@ void InstructionSelector::InitializeCallBuffer(Node* call, CallBuffer* buffer,
     case CallDescriptor::kCallAddress:
       buffer->instruction_args.push_back(
           (call_address_immediate &&
-           (callee->opcode() == IrOpcode::kInt32Constant ||
-            callee->opcode() == IrOpcode::kInt64Constant))
+           callee->opcode() == IrOpcode::kExternalConstant)
               ? g.UseImmediate(callee)
               : g.UseRegister(callee));
       break;
@@ -373,7 +372,7 @@ void InstructionSelector::InitializeCallBuffer(Node* call, CallBuffer* buffer,
   // not appear as arguments to the call. Everything else ends up
   // as an InstructionOperand argument to the call.
   auto iter(call->inputs().begin());
-  int pushed_count = 0;
+  size_t pushed_count = 0;
   for (size_t index = 0; index < input_count; ++iter, ++index) {
     DCHECK(iter != call->inputs().end());
     DCHECK((*iter)->op()->opcode() != IrOpcode::kFrameState);
@@ -393,10 +392,8 @@ void InstructionSelector::InitializeCallBuffer(Node* call, CallBuffer* buffer,
       buffer->instruction_args.push_back(op);
     }
   }
-  CHECK_EQ(pushed_count, static_cast<int>(buffer->pushed_nodes.size()));
-  DCHECK(static_cast<size_t>(input_count) ==
-         (buffer->instruction_args.size() + buffer->pushed_nodes.size() -
-          buffer->frame_state_value_count()));
+  DCHECK_EQ(input_count, buffer->instruction_args.size() + pushed_count -
+                             buffer->frame_state_value_count());
 }
 
 

src/compiler/linkage-impl.h

@@ -204,11 +204,13 @@ class LinkageHelper {
 
     // Add register and/or stack parameter(s).
     const int parameter_count = static_cast<int>(msig->parameter_count());
+    int stack_offset = LinkageTraits::CStackBackingStoreLength();
     for (int i = 0; i < parameter_count; i++) {
       if (i < LinkageTraits::CRegisterParametersLength()) {
         locations.AddParam(regloc(LinkageTraits::CRegisterParameter(i)));
       } else {
-        locations.AddParam(stackloc(-1 - i));
+        locations.AddParam(stackloc(-1 - stack_offset));
+        stack_offset++;
       }
     }
 

src/compiler/linkage.h

@@ -102,12 +102,18 @@ class CallDescriptor final : public ZoneObject {
   // Returns the kind of this call.
   Kind kind() const { return kind_; }
 
+  // Returns {true} if this descriptor is a call to a C function.
+  bool IsCFunctionCall() const { return kind_ == kCallAddress; }
+
   // Returns {true} if this descriptor is a call to a JSFunction.
   bool IsJSFunctionCall() const { return kind_ == kCallJSFunction; }
 
   // The number of return values from this call.
   size_t ReturnCount() const { return machine_sig_->return_count(); }
 
+  // The number of C parameters to this call.
+  size_t CParameterCount() const { return machine_sig_->parameter_count(); }
+
   // The number of JavaScript parameters to this call, including the receiver
   // object.
   size_t JSParameterCount() const { return js_param_count_; }

src/compiler/mips/code-generator-mips.cc

@@ -463,6 +463,22 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Jump(at);
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, kScratchReg);
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (instr->InputAt(0)->IsImmediate()) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;

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

@@ -524,7 +524,22 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
 
   // Compute InstructionOperands for inputs and outputs.
-  InitializeCallBuffer(node, &buffer, true, false);
+  InitializeCallBuffer(node, &buffer, true, true);
+
+  // Prepare for C function call.
+  if (descriptor->IsCFunctionCall()) {
+    Emit(kArchPrepareCallCFunction |
+             MiscField::encode(static_cast<int>(descriptor->CParameterCount())),
+         0, nullptr, 0, nullptr);
+
+    // Poke any stack arguments.
+    int slot = kCArgSlotCount;
+    for (Node* node : buffer.pushed_nodes) {
+      Emit(kMipsStoreToStackSlot, g.NoOutput(), g.UseRegister(node),
+           g.TempImmediate(slot << kPointerSizeLog2));
+      ++slot;
+    }
+  } else {
     // Possibly align stack here for functions.
     int push_count = buffer.pushed_nodes.size();
     if (push_count > 0) {
@@ -537,6 +552,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
            g.TempImmediate(slot << kPointerSizeLog2));
       slot--;
     }
+  }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ -553,18 +569,21 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
-    case CallDescriptor::kCallCodeObject: {
-      opcode = kArchCallCodeObject;
+    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;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();
       return;
   }
-  opcode |= MiscField::encode(flags);
 
   // Emit the call instruction.
   size_t const output_count = buffer.outputs.size();

src/compiler/mips/linkage-mips.cc

@@ -28,6 +28,7 @@ struct MipsLinkageHelperTraits {
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 4; }
+  static int CStackBackingStoreLength() { return 0; }
 };
 
 

src/compiler/mips64/code-generator-mips64.cc

@@ -463,6 +463,22 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ Jump(at);
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters, kScratchReg);
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (instr->InputAt(0)->IsImmediate()) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;

src/compiler/mips64/instruction-selector-mips64.cc

@@ -673,8 +673,22 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   CallBuffer buffer(zone(), descriptor, frame_state_descriptor);
 
   // Compute InstructionOperands for inputs and outputs.
-  InitializeCallBuffer(node, &buffer, true, false);
+  InitializeCallBuffer(node, &buffer, true, true);
+
+  // Prepare for C function call.
+  if (descriptor->IsCFunctionCall()) {
+    Emit(kArchPrepareCallCFunction |
+             MiscField::encode(static_cast<int>(descriptor->CParameterCount())),
+         0, nullptr, 0, nullptr);
 
+    // Poke any stack arguments.
+    int slot = kCArgSlotCount;
+    for (Node* node : buffer.pushed_nodes) {
+      Emit(kMips64StoreToStackSlot, g.NoOutput(), g.UseRegister(node),
+           g.TempImmediate(slot << kPointerSizeLog2));
+      ++slot;
+    }
+  } else {
     const int32_t push_count = static_cast<int32_t>(buffer.pushed_nodes.size());
     if (push_count > 0) {
       Emit(kMips64StackClaim, g.NoOutput(),
@@ -686,6 +700,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
            g.TempImmediate(slot << kPointerSizeLog2));
       slot--;
     }
+  }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ -702,12 +717,16 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
-    case CallDescriptor::kCallCodeObject: {
-      opcode = kArchCallCodeObject;
+    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;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();

src/compiler/mips64/linkage-mips64.cc

@@ -28,6 +28,7 @@ struct MipsLinkageHelperTraits {
     return register_parameters[i];
   }
   static int CRegisterParametersLength() { return 8; }
+  static int CStackBackingStoreLength() { return 0; }
 };
 
 

src/compiler/x64/code-generator-x64.cc

@@ -602,6 +602,22 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ jmp(FieldOperand(func, JSFunction::kCodeEntryOffset));
       break;
     }
+    case kArchPrepareCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      __ PrepareCallCFunction(num_parameters);
+      break;
+    }
+    case kArchCallCFunction: {
+      int const num_parameters = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        ExternalReference ref = i.InputExternalReference(0);
+        __ CallCFunction(ref, num_parameters);
+      } else {
+        Register func = i.InputRegister(0);
+        __ CallCFunction(func, num_parameters);
+      }
+      break;
+    }
     case kArchJmp:
       AssembleArchJump(i.InputRpo(0));
       break;
@@ -1215,6 +1231,15 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
         }
       }
       break;
+    case kX64Poke: {
+      int const slot = MiscField::decode(instr->opcode());
+      if (HasImmediateInput(instr, 0)) {
+        __ movq(Operand(rsp, slot * kPointerSize), i.InputImmediate(0));
+      } else {
+        __ movq(Operand(rsp, slot * kPointerSize), i.InputRegister(0));
+      }
+      break;
+    }
     case kX64StoreWriteBarrier: {
       Register object = i.InputRegister(0);
       Register value = i.InputRegister(2);

src/compiler/x64/instruction-codes-x64.h

@@ -114,6 +114,7 @@ namespace compiler {
   V(X64Dec32)                      \
   V(X64Inc32)                      \
   V(X64Push)                       \
+  V(X64Poke)                       \
   V(X64StoreWriteBarrier)          \
   V(X64StackCheck)
 

src/compiler/x64/instruction-selector-x64.cc

@@ -1038,6 +1038,22 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Compute InstructionOperands for inputs and outputs.
   InitializeCallBuffer(node, &buffer, true, true);
 
+  // Prepare for C function call.
+  if (descriptor->IsCFunctionCall()) {
+    Emit(kArchPrepareCallCFunction |
+             MiscField::encode(static_cast<int>(descriptor->CParameterCount())),
+         0, nullptr, 0, nullptr);
+
+    // Poke any stack arguments.
+    for (size_t n = 0; n < buffer.pushed_nodes.size(); ++n) {
+      if (Node* node = buffer.pushed_nodes[n]) {
+        int const slot = static_cast<int>(n);
+        InstructionOperand value =
+            g.CanBeImmediate(node) ? g.UseImmediate(node) : g.UseRegister(node);
+        Emit(kX64Poke | MiscField::encode(slot), g.NoOutput(), value);
+      }
+    }
+  } else {
     // Push any stack arguments.
     for (Node* node : base::Reversed(buffer.pushed_nodes)) {
       // TODO(titzer): handle pushing double parameters.
@@ -1047,6 +1063,7 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
               : IsSupported(ATOM) ? g.UseRegister(node) : g.Use(node);
       Emit(kX64Push, g.NoOutput(), value);
     }
+  }
 
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
@@ -1063,17 +1080,21 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Select the appropriate opcode based on the call type.
   InstructionCode opcode;
   switch (descriptor->kind()) {
+    case CallDescriptor::kCallAddress:
+      opcode =
+          kArchCallCFunction |
+          MiscField::encode(static_cast<int>(descriptor->CParameterCount()));
+      break;
     case CallDescriptor::kCallCodeObject:
-      opcode = kArchCallCodeObject;
+      opcode = kArchCallCodeObject | MiscField::encode(flags);
       break;
     case CallDescriptor::kCallJSFunction:
-      opcode = kArchCallJSFunction;
+      opcode = kArchCallJSFunction | MiscField::encode(flags);
       break;
     default:
       UNREACHABLE();
       return;
   }
-  opcode |= MiscField::encode(flags);
 
   // Emit the call instruction.
   size_t const output_count = buffer.outputs.size();

src/compiler/x64/linkage-x64.cc

@@ -43,6 +43,7 @@ struct X64LinkageHelperTraits {
     }
   }
   static int CRegisterParametersLength() { return kWin64 ? 4 : 6; }
+  static int CStackBackingStoreLength() { return kWin64 ? 4 : 0; }
 };
 
 typedef LinkageHelper<X64LinkageHelperTraits> LH;

test/cctest/compiler/test-run-machops.cc

@@ -5138,4 +5138,83 @@ TEST(RunFloat64RoundTiesAway) {
   }
 }
 
+
+#if !USE_SIMULATOR
+
+namespace {
+
+int32_t const kMagicFoo0 = 0xdeadbeef;
+
+
+int32_t foo0() { return kMagicFoo0; }
+
+
+int32_t foo1(int32_t x) { return x; }
+
+
+int32_t foo2(int32_t x, int32_t y) { return x - y; }
+
+
+int32_t foo8(int32_t a, int32_t b, int32_t c, int32_t d, int32_t e, int32_t f,
+             int32_t g, int32_t h) {
+  return a + b + c + d + e + f + g + h;
+}
+
+}  // namespace
+
+
+TEST(RunCallCFunction0) {
+  auto* foo0_ptr = &foo0;
+  RawMachineAssemblerTester<int32_t> m;
+  Node* function = m.LoadFromPointer(&foo0_ptr, kMachPtr);
+  m.Return(m.CallCFunction0(kMachInt32, function));
+  CHECK_EQ(kMagicFoo0, m.Call());
+}
+
+
+TEST(RunCallCFunction1) {
+  auto* foo1_ptr = &foo1;
+  RawMachineAssemblerTester<int32_t> m(kMachInt32);
+  Node* function = m.LoadFromPointer(&foo1_ptr, kMachPtr);
+  m.Return(m.CallCFunction1(kMachInt32, kMachInt32, function, m.Parameter(0)));
+  FOR_INT32_INPUTS(i) {
+    int32_t const expected = *i;
+    CHECK_EQ(expected, m.Call(expected));
+  }
+}
+
+
+TEST(RunCallCFunction2) {
+  auto* foo2_ptr = &foo2;
+  RawMachineAssemblerTester<int32_t> m(kMachInt32, kMachInt32);
+  Node* function = m.LoadFromPointer(&foo2_ptr, kMachPtr);
+  m.Return(m.CallCFunction2(kMachInt32, kMachInt32, kMachInt32, function,
+                            m.Parameter(0), m.Parameter(1)));
+  FOR_INT32_INPUTS(i) {
+    int32_t const x = *i;
+    FOR_INT32_INPUTS(j) {
+      int32_t const y = *j;
+      CHECK_EQ(x - y, m.Call(x, y));
+    }
+  }
+}
+
+
+TEST(RunCallCFunction8) {
+  auto* foo8_ptr = &foo8;
+  RawMachineAssemblerTester<int32_t> m(kMachInt32);
+  Node* function = m.LoadFromPointer(&foo8_ptr, kMachPtr);
+  Node* param = m.Parameter(0);
+  m.Return(m.CallCFunction8(kMachInt32, kMachInt32, kMachInt32, kMachInt32,
+                            kMachInt32, kMachInt32, kMachInt32, kMachInt32,
+                            kMachInt32, function, param, param, param, param,
+                            param, param, param, param));
+  FOR_INT32_INPUTS(i) {
+    int32_t const x = *i;
+    CHECK_EQ(x * 8, m.Call(x));
+  }
+}
+
+#endif  // USE_SIMULATOR
+
 #endif  // V8_TURBOFAN_TARGET

test/unittests/compiler/raw-machine-assembler.cc

@@ -144,6 +144,78 @@ Node* RawMachineAssembler::CallRuntime1(Runtime::FunctionId function,
 }
 
 
+Node* RawMachineAssembler::CallCFunction0(MachineType return_type,
+                                          Node* function) {
+  MachineSignature::Builder builder(zone(), 1, 0);
+  builder.AddReturn(return_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call = graph()->NewNode(common()->Call(descriptor), function);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
+Node* RawMachineAssembler::CallCFunction1(MachineType return_type,
+                                          MachineType arg0_type, Node* function,
+                                          Node* arg0) {
+  MachineSignature::Builder builder(zone(), 1, 1);
+  builder.AddReturn(return_type);
+  builder.AddParam(arg0_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call = graph()->NewNode(common()->Call(descriptor), function, arg0);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
+Node* RawMachineAssembler::CallCFunction2(MachineType return_type,
+                                          MachineType arg0_type,
+                                          MachineType arg1_type, Node* function,
+                                          Node* arg0, Node* arg1) {
+  MachineSignature::Builder builder(zone(), 1, 2);
+  builder.AddReturn(return_type);
+  builder.AddParam(arg0_type);
+  builder.AddParam(arg1_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call =
+      graph()->NewNode(common()->Call(descriptor), function, arg0, arg1);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
+Node* RawMachineAssembler::CallCFunction8(
+    MachineType return_type, MachineType arg0_type, MachineType arg1_type,
+    MachineType arg2_type, MachineType arg3_type, MachineType arg4_type,
+    MachineType arg5_type, MachineType arg6_type, MachineType arg7_type,
+    Node* function, Node* arg0, Node* arg1, Node* arg2, Node* arg3, Node* arg4,
+    Node* arg5, Node* arg6, Node* arg7) {
+  MachineSignature::Builder builder(zone(), 1, 8);
+  builder.AddReturn(return_type);
+  builder.AddParam(arg0_type);
+  builder.AddParam(arg1_type);
+  builder.AddParam(arg2_type);
+  builder.AddParam(arg3_type);
+  builder.AddParam(arg4_type);
+  builder.AddParam(arg5_type);
+  builder.AddParam(arg6_type);
+  builder.AddParam(arg7_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call = graph()->NewNode(common()->Call(descriptor), function, arg0,
+                                arg1, arg2, arg3, arg4, arg5, arg6, arg7);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
 void RawMachineAssembler::Bind(Label* label) {
   DCHECK(current_block_ == NULL);
   DCHECK(!label->bound_);

test/unittests/compiler/raw-machine-assembler.h

@@ -471,6 +471,23 @@ class RawMachineAssembler : public GraphBuilder {
   // Call to a runtime function with zero parameters.
   Node* CallRuntime1(Runtime::FunctionId function, Node* arg0, Node* context,
                      Node* frame_state);
+  // Call to a C function with zero parameters.
+  Node* CallCFunction0(MachineType return_type, Node* function);
+  // Call to a C function with one parameter.
+  Node* CallCFunction1(MachineType return_type, MachineType arg0_type,
+                       Node* function, Node* arg0);
+  // Call to a C function with two parameters.
+  Node* CallCFunction2(MachineType return_type, MachineType arg0_type,
+                       MachineType arg1_type, Node* function, Node* arg0,
+                       Node* arg1);
+  // Call to a C function with eight parameters.
+  Node* CallCFunction8(MachineType return_type, MachineType arg0_type,
+                       MachineType arg1_type, MachineType arg2_type,
+                       MachineType arg3_type, MachineType arg4_type,
+                       MachineType arg5_type, MachineType arg6_type,
+                       MachineType arg7_type, Node* function, Node* arg0,
+                       Node* arg1, Node* arg2, Node* arg3, Node* arg4,
+                       Node* arg5, Node* arg6, Node* arg7);
   void Return(Node* value);
   void Bind(Label* label);
   void Deoptimize(Node* state);