JitBase: Centralize location of code buffer

Given the code buffer is something truly common to all JIT
implementations, we can centralize it in the base class and avoid
duplicating it all over the place, while still allowing for differently
sized buffers.

Source/Core/Core/PowerPC/CachedInterpreter/CachedInterpreter.cpp

@@ -48,9 +48,7 @@ struct CachedInterpreter::Instruction
   Type type = Type::Abort;
 };
 
-CachedInterpreter::CachedInterpreter() : code_buffer(32000)
-{
-}
+CachedInterpreter::CachedInterpreter() = default;
 
 CachedInterpreter::~CachedInterpreter() = default;
 
@@ -194,7 +192,7 @@ void CachedInterpreter::Jit(u32 address)
     ClearCache();
   }
 
-  const u32 nextPC = analyzer.Analyze(PC, &code_block, &code_buffer, code_buffer.size());
+  const u32 nextPC = analyzer.Analyze(PC, &code_block, &m_code_buffer, m_code_buffer.size());
   if (code_block.m_memory_exception)
   {
     // Address of instruction could not be translated
@@ -218,7 +216,7 @@ void CachedInterpreter::Jit(u32 address)
 
   for (u32 i = 0; i < code_block.m_num_instructions; i++)
   {
-    PPCAnalyst::CodeOp& op = code_buffer[i];
+    PPCAnalyst::CodeOp& op = m_code_buffer[i];
 
     js.downcountAmount += op.opinfo->numCycles;
 

Source/Core/Core/PowerPC/CachedInterpreter/CachedInterpreter.h

@@ -42,5 +42,4 @@ private:
 
   BlockCache m_block_cache{*this};
   std::vector<Instruction> m_code;
-  PPCAnalyst::CodeBuffer code_buffer;
 };