MIPS: crankshaft implementation

src/mips/builtins-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1158 matching lines @@
     __ pop(a1);
 
     // Tear down temporary frame.
   }
 
   // Do a tail-call of the compiled function.
   __ Jump(t9);
 }
 
 
-// These functions are called from C++ but cannot be used in live code.
+static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
+                                             Deoptimizer::BailoutType type) {
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    // Pass the function and deoptimization type to the runtime system.
+    __ li(a0, Operand(Smi::FromInt(static_cast<int>(type))));
+    __ push(a0);
+    __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
+  }
+
+  // Get the full codegen state from the stack and untag it -> t2.
+  __ lw(t2, MemOperand(sp, 0 * kPointerSize));
+  __ SmiUntag(t2);
+  // Switch on the state.
+  Label with_tos_register, unknown_state;
+  __ Branch(&with_tos_register,
+            ne, t2, Operand(FullCodeGenerator::NO_REGISTERS));
+  __ Addu(sp, sp, Operand(1 * kPointerSize));  // Remove state.
+  __ Ret();
+
+  __ bind(&with_tos_register);
+  __ lw(v0, MemOperand(sp, 1 * kPointerSize));
+  __ Branch(&unknown_state, ne, t2, Operand(FullCodeGenerator::TOS_REG));
+
+  __ Addu(sp, sp, Operand(2 * kPointerSize));  // Remove state.
+  __ Ret();
+
+  __ bind(&unknown_state);
+  __ stop("no cases left");
+}
+
+
 void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
-  __ Abort("Call to unimplemented function in builtins-mips.cc");
+  Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
 }
 
 
 void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) {
-  __ Abort("Call to unimplemented function in builtins-mips.cc");
+  Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
 }
 
 
 void Builtins::Generate_NotifyOSR(MacroAssembler* masm) {
-  __ Abort("Call to unimplemented function in builtins-mips.cc");
+  // For now, we are relying on the fact that Runtime::NotifyOSR
+  // doesn't do any garbage collection which allows us to save/restore
+  // the registers without worrying about which of them contain
+  // pointers. This seems a bit fragile.
+  RegList saved_regs =
+      (kJSCallerSaved | kCalleeSaved | ra.bit() | fp.bit()) & ~sp.bit();
+  __ MultiPush(saved_regs);
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ CallRuntime(Runtime::kNotifyOSR, 0);
+  }
+  __ MultiPop(saved_regs);
+  __ Ret();
 }
 
 
 void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
-  __ Abort("Call to unimplemented function in builtins-mips.cc");
+  CpuFeatures::TryForceFeatureScope scope(VFP3);
+  if (!CpuFeatures::IsSupported(FPU)) {
+    __ Abort("Unreachable code: Cannot optimize without FPU support.");
+    return;
+  }
+
+  // Lookup the function in the JavaScript frame and push it as an
+  // argument to the on-stack replacement function.
+  __ lw(a0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ push(a0);
+    __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
+  }
+
+  // If the result was -1 it means that we couldn't optimize the
+  // function. Just return and continue in the unoptimized version.
+  __ Ret(eq, v0, Operand(Smi::FromInt(-1)));
+
+  // Untag the AST id and push it on the stack.
+  __ SmiUntag(v0);
+  __ push(v0);
+
+  // Generate the code for doing the frame-to-frame translation using
+  // the deoptimizer infrastructure.
+  Deoptimizer::EntryGenerator generator(masm, Deoptimizer::OSR);
+  generator.Generate();
 }
 
 
 void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   // 1. Make sure we have at least one argument.
   // a0: actual number of arguments
   { Label done;
     __ Branch(&done, ne, a0, Operand(zero_reg));
     __ LoadRoot(t2, Heap::kUndefinedValueRootIndex);
     __ push(t2);
@@ skipping 181 matching lines @@
 
 
 void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kIndexOffset    = -5 * kPointerSize;
   const int kLimitOffset    = -4 * kPointerSize;
   const int kArgsOffset     =  2 * kPointerSize;
   const int kRecvOffset     =  3 * kPointerSize;
   const int kFunctionOffset =  4 * kPointerSize;
 
   {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
     __ lw(a0, MemOperand(fp, kFunctionOffset));  // Get the function.
     __ push(a0);
     __ lw(a0, MemOperand(fp, kArgsOffset));  // Get the args array.
     __ push(a0);
     // Returns (in v0) number of arguments to copy to stack as Smi.
     __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
 
     // Check the stack for overflow. We are not trying to catch
     // interruptions (e.g. debug break and preemption) here, so the "real stack
     // limit" is checked.
@@ skipping 113 matching lines @@
     Label call_proxy;
     ParameterCount actual(a0);
     __ sra(a0, a0, kSmiTagSize);
     __ lw(a1, MemOperand(fp, kFunctionOffset));
     __ GetObjectType(a1, a2, a2);
     __ Branch(&call_proxy, ne, a2, Operand(JS_FUNCTION_TYPE));
 
     __ InvokeFunction(a1, actual, CALL_FUNCTION,
                       NullCallWrapper(), CALL_AS_METHOD);
 
-    scope.GenerateLeaveFrame();
-
+    frame_scope.GenerateLeaveFrame();
     __ Ret(USE_DELAY_SLOT);
     __ Addu(sp, sp, Operand(3 * kPointerSize));  // In delay slot.
 
     // Invoke the function proxy.
     __ bind(&call_proxy);
     __ push(a1);  // Add function proxy as last argument.
     __ Addu(a0, a0, Operand(1));
     __ li(a2, Operand(0, RelocInfo::NONE));
     __ SetCallKind(t1, CALL_AS_METHOD);
     __ GetBuiltinEntry(a3, Builtins::CALL_FUNCTION_PROXY);
@@ skipping 144 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(a3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS