[base] Remove PointersMatch, making a separate std::equals hashmap

src/ppc/simulator-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_PPC
 
@@ skipping 640 matching lines @@
   intptr_t end_page = ((start + size) & ~CachePage::kPageMask);
   return start_page == end_page;
 }
 
 
 void Simulator::set_last_debugger_input(char* input) {
   DeleteArray(last_debugger_input_);
   last_debugger_input_ = input;
 }
 
-
-void Simulator::FlushICache(base::HashMap* i_cache, void* start_addr,
-                            size_t size) {
+void Simulator::FlushICache(base::CustomMatcherHashMap* i_cache,
+                            void* start_addr, size_t size) {
   intptr_t start = reinterpret_cast<intptr_t>(start_addr);
   int intra_line = (start & CachePage::kLineMask);
   start -= intra_line;
   size += intra_line;
   size = ((size - 1) | CachePage::kLineMask) + 1;
   int offset = (start & CachePage::kPageMask);
   while (!AllOnOnePage(start, size - 1)) {
     int bytes_to_flush = CachePage::kPageSize - offset;
     FlushOnePage(i_cache, start, bytes_to_flush);
     start += bytes_to_flush;
     size -= bytes_to_flush;
     DCHECK_EQ(0, static_cast<int>(start & CachePage::kPageMask));
     offset = 0;
   }
   if (size != 0) {
     FlushOnePage(i_cache, start, size);
   }
 }
 
-
-CachePage* Simulator::GetCachePage(base::HashMap* i_cache, void* page) {
+CachePage* Simulator::GetCachePage(base::CustomMatcherHashMap* i_cache,
+                                   void* page) {
   base::HashMap::Entry* entry = i_cache->LookupOrInsert(page, ICacheHash(page));
   if (entry->value == NULL) {
     CachePage* new_page = new CachePage();
     entry->value = new_page;
   }
   return reinterpret_cast<CachePage*>(entry->value);
 }
 
 
 // Flush from start up to and not including start + size.
-void Simulator::FlushOnePage(base::HashMap* i_cache, intptr_t start, int size) {
+void Simulator::FlushOnePage(base::CustomMatcherHashMap* i_cache,
+                             intptr_t start, int size) {
   DCHECK(size <= CachePage::kPageSize);
   DCHECK(AllOnOnePage(start, size - 1));
   DCHECK((start & CachePage::kLineMask) == 0);
   DCHECK((size & CachePage::kLineMask) == 0);
   void* page = reinterpret_cast<void*>(start & (~CachePage::kPageMask));
   int offset = (start & CachePage::kPageMask);
   CachePage* cache_page = GetCachePage(i_cache, page);
   char* valid_bytemap = cache_page->ValidityByte(offset);
   memset(valid_bytemap, CachePage::LINE_INVALID, size >> CachePage::kLineShift);
 }
 
-void Simulator::CheckICache(base::HashMap* i_cache, Instruction* instr) {
+void Simulator::CheckICache(base::CustomMatcherHashMap* i_cache,
+                            Instruction* instr) {
   intptr_t address = reinterpret_cast<intptr_t>(instr);
   void* page = reinterpret_cast<void*>(address & (~CachePage::kPageMask));
   void* line = reinterpret_cast<void*>(address & (~CachePage::kLineMask));
   int offset = (address & CachePage::kPageMask);
   CachePage* cache_page = GetCachePage(i_cache, page);
   char* cache_valid_byte = cache_page->ValidityByte(offset);
   bool cache_hit = (*cache_valid_byte == CachePage::LINE_VALID);
   char* cached_line = cache_page->CachedData(offset & ~CachePage::kLineMask);
   if (cache_hit) {
     // Check that the data in memory matches the contents of the I-cache.
@@ skipping 12 matching lines @@
   if (isolate->simulator_initialized()) return;
   isolate->set_simulator_initialized(true);
   ::v8::internal::ExternalReference::set_redirector(isolate,
                                                     &RedirectExternalReference);
 }
 
 
 Simulator::Simulator(Isolate* isolate) : isolate_(isolate) {
   i_cache_ = isolate_->simulator_i_cache();
   if (i_cache_ == NULL) {
-    i_cache_ = new base::HashMap(&ICacheMatch);
+    i_cache_ = new base::CustomMatcherHashMap(&ICacheMatch);
     isolate_->set_simulator_i_cache(i_cache_);
   }
   Initialize(isolate);
 // Set up simulator support first. Some of this information is needed to
 // setup the architecture state.
 #if V8_TARGET_ARCH_PPC64
   size_t stack_size = FLAG_sim_stack_size * KB;
 #else
   size_t stack_size = MB;  // allocate 1MB for stack
 #endif
@@ skipping 114 matching lines @@
  private:
   void* external_function_;
   uint32_t swi_instruction_;
   ExternalReference::Type type_;
   Redirection* next_;
   intptr_t function_descriptor_[3];
 };
 
 
 // static
-void Simulator::TearDown(base::HashMap* i_cache, Redirection* first) {
+void Simulator::TearDown(base::CustomMatcherHashMap* i_cache,
+                         Redirection* first) {
   Redirection::DeleteChain(first);
   if (i_cache != nullptr) {
     for (base::HashMap::Entry* entry = i_cache->Start(); entry != nullptr;
          entry = i_cache->Next(entry)) {
       delete static_cast<CachePage*>(entry->value);
     }
     delete i_cache;
   }
 }
 
@@ skipping 3193 matching lines @@
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(current_sp);
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 #endif  // V8_TARGET_ARCH_PPC