Revert r8309 "ARM: Clean up literal pool generation." because of crashes.

src/arm/regexp-macro-assembler-arm.cc

 // Copyright 2009 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 936 matching lines @@
     int constant_offset = GetBacktrackConstantPoolEntry();
     masm_->label_at_put(label, constant_offset);
     // Reading pc-relative is based on the address 8 bytes ahead of
     // the current opcode.
     unsigned int offset_of_pc_register_read =
       masm_->pc_offset() + Assembler::kPcLoadDelta;
     int pc_offset_of_constant =
       constant_offset - offset_of_pc_register_read;
     ASSERT(pc_offset_of_constant < 0);
     if (is_valid_memory_offset(pc_offset_of_constant)) {
-      Assembler::BlockConstPoolScope block_const_pool(masm_);
+      masm_->BlockConstPoolBefore(masm_->pc_offset() + Assembler::kInstrSize);
       __ ldr(r0, MemOperand(pc, pc_offset_of_constant));
     } else {
       // Not a 12-bit offset, so it needs to be loaded from the constant
       // pool.
-      Assembler::BlockConstPoolScope block_const_pool(masm_);
+      masm_->BlockConstPoolBefore(
+          masm_->pc_offset() + 2 * Assembler::kInstrSize);
       __ mov(r0, Operand(pc_offset_of_constant + Assembler::kInstrSize));
       __ ldr(r0, MemOperand(pc, r0));
     }
   }
   Push(r0);
   CheckStackLimit();
 }
 
 
 void RegExpMacroAssemblerARM::PushCurrentPosition() {
@@ skipping 278 matching lines @@
       ExternalReference::address_of_regexp_stack_limit(masm_->isolate());
   __ mov(r0, Operand(stack_limit));
   __ ldr(r0, MemOperand(r0));
   __ cmp(backtrack_stackpointer(), Operand(r0));
   SafeCall(&stack_overflow_label_, ls);
 }
 
 
 void RegExpMacroAssemblerARM::EmitBacktrackConstantPool() {
   __ CheckConstPool(false, false);
-  Assembler::BlockConstPoolScope block_const_pool(masm_);
+  __ BlockConstPoolBefore(
+      masm_->pc_offset() + kBacktrackConstantPoolSize * Assembler::kInstrSize);
   backtrack_constant_pool_offset_ = masm_->pc_offset();
   for (int i = 0; i < kBacktrackConstantPoolSize; i++) {
     __ emit(0);
   }
 
   backtrack_constant_pool_capacity_ = kBacktrackConstantPoolSize;
 }
 
 
 int RegExpMacroAssemblerARM::GetBacktrackConstantPoolEntry() {
@@ skipping 78 matching lines @@
   __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex));
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM