* Made preemption work in Irregexp-native-ia32

src/assembler-ia32-inl.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 134 matching lines @@
   x_ = reinterpret_cast<int32_t>(ext.address());
   rmode_ = RelocInfo::EXTERNAL_REFERENCE;
 }
 
 Immediate::Immediate(const char* s) {
   x_ = reinterpret_cast<int32_t>(s);
   rmode_ = RelocInfo::EMBEDDED_STRING;
 }
 
 
+Immediate::Immediate(Label *internal_offset) {
+  x_ = reinterpret_cast<int32_t>(internal_offset);
+  rmode_ = RelocInfo::INTERNAL_REFERENCE;
+}
+
+
 Immediate::Immediate(Handle<Object> handle) {
   // Verify all Objects referred by code are NOT in new space.
   Object* obj = *handle;
   ASSERT(!Heap::InNewSpace(obj));
   if (obj->IsHeapObject()) {
     x_ = reinterpret_cast<intptr_t>(handle.location());
     rmode_ = RelocInfo::EMBEDDED_OBJECT;
   } else {
     // no relocation needed
     x_ =  reinterpret_cast<intptr_t>(obj);
@@ skipping 28 matching lines @@
 }
 
 
 void Assembler::emit(uint32_t x, RelocInfo::Mode rmode) {
   if (rmode != RelocInfo::NONE) RecordRelocInfo(rmode);
   emit(x);
 }
 
 
 void Assembler::emit(const Immediate& x) {
+  if (x.rmode_ == RelocInfo::INTERNAL_REFERENCE) {
+    Label* label = reinterpret_cast<Label*>(x.x_);
+    emit_code_relative_offset(label);
+    return;
+  }
   if (x.rmode_ != RelocInfo::NONE) RecordRelocInfo(x.rmode_);
   emit(x.x_);
 }
 
 
+void Assembler::emit_code_relative_offset(Label* label) {
+  if (label->is_bound()) {
+    int32_t pos;
+    pos = label->pos() + Code::kHeaderSize - kHeapObjectTag;
+    emit(pos);
+  } else {
+    emit_disp(label, Displacement::CODE_RELATIVE);
+  }
+}
+
+
 void Assembler::emit_w(const Immediate& x) {
   ASSERT(x.rmode_ == RelocInfo::NONE);
   uint16_t value = static_cast<uint16_t>(x.x_);
   reinterpret_cast<uint16_t*>(pc_)[0] = value;
   pc_ += sizeof(uint16_t);
 }
 
 
 Address Assembler::target_address_at(Address pc) {
   return pc + sizeof(int32_t) + *reinterpret_cast<int32_t*>(pc);
@@ skipping 47 matching lines @@
 
 Operand::Operand(int32_t disp, RelocInfo::Mode rmode) {
   // [disp/r]
   set_modrm(0, ebp);
   set_dispr(disp, rmode);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_IA32_INL_H_