X87: [Interpreter] Add basic deoptimization support from TurboFan to Ignition.

src/x87/builtins-x87.cc

Index: src/x87/builtins-x87.cc
diff --git a/src/x87/builtins-x87.cc b/src/x87/builtins-x87.cc
index f0e5f10c1c7ea95baac500fadcb3a74955938360..f23110c67c9d59d793013c64c5ad29e9443196ba 100644
--- a/src/x87/builtins-x87.cc
+++ b/src/x87/builtins-x87.cc
@@ -603,7 +603,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   __ LoadRoot(ebx, Heap::kInterpreterTableRootIndex);
   __ add(ebx, Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
 
-  // Push context as a stack located parameter to the bytecode handler.
+  // Push dispatch table as a stack located parameter to the bytecode handler.
   DCHECK_EQ(-1, kInterpreterDispatchTableSpillSlot);
   __ push(ebx);
 
@@ -733,6 +733,90 @@ void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
 }
 
 
+static void Generate_InterpreterNotifyDeoptimizedHelper(
+    MacroAssembler* masm, Deoptimizer::BailoutType type) {
+  // Enter an internal frame.
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ Push(kInterpreterAccumulatorRegister);  // Save accumulator register.
+
+    // Pass the deoptimization type to the runtime system.
+    __ Push(Smi::FromInt(static_cast<int>(type)));
+
+    __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
+
+    __ Pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
+    // Tear down internal frame.
+  }
+
+  // Initialize register file register.
+  __ mov(kInterpreterRegisterFileRegister, ebp);
+  __ add(kInterpreterRegisterFileRegister,
+         Immediate(InterpreterFrameConstants::kRegisterFilePointerFromFp));
+
+  // Get the bytecode array pointer from the frame.
+  __ mov(ebx, Operand(kInterpreterRegisterFileRegister,
+                      InterpreterFrameConstants::kFunctionFromRegisterPointer));
+  __ mov(ebx, FieldOperand(ebx, JSFunction::kSharedFunctionInfoOffset));
+  __ mov(kInterpreterBytecodeArrayRegister,
+         FieldOperand(ebx, SharedFunctionInfo::kFunctionDataOffset));
+
+  if (FLAG_debug_code) {
+    // Check function data field is actually a BytecodeArray object.
+    __ AssertNotSmi(kInterpreterBytecodeArrayRegister);
+    __ CmpObjectType(kInterpreterBytecodeArrayRegister, BYTECODE_ARRAY_TYPE,
+                     ebx);
+    __ Assert(equal, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
+  }
+
+  // Get the target bytecode offset from the frame.
+  __ mov(
+      kInterpreterBytecodeOffsetRegister,
+      Operand(kInterpreterRegisterFileRegister,
+              InterpreterFrameConstants::kBytecodeOffsetFromRegisterPointer));
+  __ SmiUntag(kInterpreterBytecodeOffsetRegister);
+
+  // Push dispatch table as a stack located parameter to the bytecode handler -
+  // overwrite the state slot (we don't use these for interpreter deopts).
+  __ LoadRoot(ebx, Heap::kInterpreterTableRootIndex);
+  __ add(ebx, Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
+  DCHECK_EQ(-1, kInterpreterDispatchTableSpillSlot);
+  __ mov(ebx, Operand(esp, -2 * kPointerSize));
+
+  // Dispatch to the target bytecode.
+  __ movzx_b(esi, Operand(kInterpreterBytecodeArrayRegister,
+                          kInterpreterBytecodeOffsetRegister, times_1, 0));
+  __ mov(ebx, Operand(ebx, esi, times_pointer_size, 0));
+
+  // Get the context from the frame.
+  // TODO(rmcilroy): Update interpreter frame to expect current context at the
+  // context slot instead of the function context.
+  __ mov(kContextRegister,
+         Operand(kInterpreterRegisterFileRegister,
+                 InterpreterFrameConstants::kContextFromRegisterPointer));
+
+  // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging
+  // and header removal.
+  __ add(ebx, Immediate(Code::kHeaderSize - kHeapObjectTag));
+  __ jmp(ebx);
+}
+
+
+void Builtins::Generate_InterpreterNotifyDeoptimized(MacroAssembler* masm) {
+  Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
+}
+
+
+void Builtins::Generate_InterpreterNotifySoftDeoptimized(MacroAssembler* masm) {
+  Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::SOFT);
+}
+
+
+void Builtins::Generate_InterpreterNotifyLazyDeoptimized(MacroAssembler* masm) {
+  Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);