Merged r14658 into trunk branch.

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 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 342 matching lines @@
   if (deopt_jump_table_.length() > 0) {
     Comment(";;; -------------------- Jump table --------------------");
   }
   Label table_start;
   __ bind(&table_start);
   Label needs_frame_not_call;
   Label needs_frame_is_call;
   for (int i = 0; i < deopt_jump_table_.length(); i++) {
     __ bind(&deopt_jump_table_[i].label);
     Address entry = deopt_jump_table_[i].address;
-    bool is_lazy_deopt = deopt_jump_table_[i].is_lazy_deopt;
-    Deoptimizer::BailoutType type =
-        is_lazy_deopt ? Deoptimizer::LAZY : Deoptimizer::EAGER;
+    Deoptimizer::BailoutType type = deopt_jump_table_[i].bailout_type;
     int id = Deoptimizer::GetDeoptimizationId(isolate(), entry, type);
     if (id == Deoptimizer::kNotDeoptimizationEntry) {
       Comment(";;; jump table entry %d.", i);
     } else {
       Comment(";;; jump table entry %d: deoptimization bailout %d.", i, id);
     }
     if (deopt_jump_table_[i].needs_frame) {
       __ mov(ip, Operand(ExternalReference::ForDeoptEntry(entry)));
-      if (is_lazy_deopt) {
+      if (type == Deoptimizer::LAZY) {
         if (needs_frame_is_call.is_bound()) {
           __ b(&needs_frame_is_call);
         } else {
           __ bind(&needs_frame_is_call);
           __ stm(db_w, sp, cp.bit() | fp.bit() | lr.bit());
           // This variant of deopt can only be used with stubs. Since we don't
           // have a function pointer to install in the stack frame that we're
           // building, install a special marker there instead.
           ASSERT(info()->IsStub());
           __ mov(scratch0(), Operand(Smi::FromInt(StackFrame::STUB)));
@@ skipping 12 matching lines @@
           // have a function pointer to install in the stack frame that we're
           // building, install a special marker there instead.
           ASSERT(info()->IsStub());
           __ mov(scratch0(), Operand(Smi::FromInt(StackFrame::STUB)));
           __ push(scratch0());
           __ add(fp, sp, Operand(2 * kPointerSize));
           __ mov(pc, ip);
         }
       }
     } else {
-      if (is_lazy_deopt) {
+      if (type == Deoptimizer::LAZY) {
         __ mov(lr, Operand(pc), LeaveCC, al);
         __ mov(pc, Operand(ExternalReference::ForDeoptEntry(entry)));
       } else {
         __ mov(pc, Operand(ExternalReference::ForDeoptEntry(entry)));
       }
     }
     masm()->CheckConstPool(false, false);
   }
 
   // Force constant pool emission at the end of the deopt jump table to make
@@ skipping 408 matching lines @@
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
                           translation.index(),
                           (mode == Safepoint::kLazyDeopt) ? pc_offset : -1);
     deoptimizations_.Add(environment, zone());
   }
 }
 
 
-void LCodeGen::DeoptimizeIf(Condition cc, LEnvironment* environment) {
+void LCodeGen::DeoptimizeIf(Condition cc,
+                            LEnvironment* environment,
+                            Deoptimizer::BailoutType bailout_type) {
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
   ASSERT(environment->HasBeenRegistered());
   int id = environment->deoptimization_index();
   ASSERT(info()->IsOptimizing() || info()->IsStub());
-  Deoptimizer::BailoutType bailout_type = info()->IsStub()
-      ? Deoptimizer::LAZY
-      : Deoptimizer::EAGER;
   Address entry =
       Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
   if (entry == NULL) {
     Abort("bailout was not prepared");
     return;
   }
 
   ASSERT(FLAG_deopt_every_n_times < 2);  // Other values not supported on ARM.
   if (FLAG_deopt_every_n_times == 1 &&
       !info()->IsStub() &&
@@ skipping 12 matching lines @@
     if (needs_lazy_deopt) {
       __ Call(entry, RelocInfo::RUNTIME_ENTRY);
     } else {
       __ Jump(entry, RelocInfo::RUNTIME_ENTRY);
     }
   } else {
     // We often have several deopts to the same entry, reuse the last
     // jump entry if this is the case.
     if (deopt_jump_table_.is_empty() ||
         (deopt_jump_table_.last().address != entry) ||
-        (deopt_jump_table_.last().is_lazy_deopt != needs_lazy_deopt) ||
+        (deopt_jump_table_.last().bailout_type != bailout_type) ||
         (deopt_jump_table_.last().needs_frame != !frame_is_built_)) {
-      JumpTableEntry table_entry(entry, !frame_is_built_, needs_lazy_deopt);
+      Deoptimizer::JumpTableEntry table_entry(entry,
+                                              bailout_type,
+                                              !frame_is_built_);
       deopt_jump_table_.Add(table_entry, zone());
     }
     __ b(cc, &deopt_jump_table_.last().label);
   }
 }
 
 
+void LCodeGen::DeoptimizeIf(Condition cc,
+                            LEnvironment* environment) {
+  Deoptimizer::BailoutType bailout_type = info()->IsStub()
+      ? Deoptimizer::LAZY
+      : Deoptimizer::EAGER;
+  DeoptimizeIf(cc, environment, bailout_type);
+}
+
+
+void LCodeGen::SoftDeoptimize(LEnvironment* environment) {
+  ASSERT(!info()->IsStub());
+  DeoptimizeIf(al, environment, Deoptimizer::SOFT);
+}
+
+
 void LCodeGen::RegisterDependentCodeForEmbeddedMaps(Handle<Code> code) {
   ZoneList<Handle<Map> > maps(1, zone());
   int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
   for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
     RelocInfo::Mode mode = it.rinfo()->rmode();
     if (mode == RelocInfo::EMBEDDED_OBJECT &&
         it.rinfo()->target_object()->IsMap()) {
       Handle<Map> map(Map::cast(it.rinfo()->target_object()));
       if (map->CanTransition()) {
         maps.Add(map, zone());
@@ skipping 4819 matching lines @@
 void LCodeGen::DoLazyBailout(LLazyBailout* instr) {
   EnsureSpaceForLazyDeopt();
   ASSERT(instr->HasEnvironment());
   LEnvironment* env = instr->environment();
   RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
   safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
 }
 
 
 void LCodeGen::DoDeoptimize(LDeoptimize* instr) {
-  DeoptimizeIf(al, instr->environment());
+  if (instr->hydrogen_value()->IsSoftDeoptimize()) {
+    SoftDeoptimize(instr->environment());
+  } else {
+    DeoptimizeIf(al, instr->environment());
+  }
 }
 
 
 void LCodeGen::DoDummyUse(LDummyUse* instr) {
   // Nothing to see here, move on!
 }
 
 
 void LCodeGen::DoDeleteProperty(LDeleteProperty* instr) {
   Register object = ToRegister(instr->object());
@@ skipping 187 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal