Use const properly so that we dont remove const qualifier from region and MII

by casting. Found with gcc48.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163247 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/Disassembler/X86Disassembler.cpp

@@ -44,7 +44,7 @@ void x86DisassemblerDebug(const char *file,
   dbgs() << file << ":" << line << ": " << s;
 }
 
-const char *x86DisassemblerGetInstrName(unsigned Opcode, void *mii) {
+const char *x86DisassemblerGetInstrName(unsigned Opcode, const void *mii) {
   const MCInstrInfo *MII = static_cast<const MCInstrInfo *>(mii);
   return MII->getName(Opcode);
 }
@@ -95,8 +95,8 @@ const EDInstInfo *X86GenericDisassembler::getEDInfo() const {
 ///                   be a pointer to a MemoryObject.
 /// @param byte     - A pointer to the byte to be read.
 /// @param address  - The address to be read.
-static int regionReader(void* arg, uint8_t* byte, uint64_t address) {
-  MemoryObject* region = static_cast<MemoryObject*>(arg);
+static int regionReader(const void* arg, uint8_t* byte, uint64_t address) {
+  const MemoryObject* region = static_cast<const MemoryObject*>(arg);
   return region->readByte(address, byte);
 }
 
@@ -135,10 +135,10 @@ X86GenericDisassembler::getInstruction(MCInst &instr,
   
   int ret = decodeInstruction(&internalInstr,
                               regionReader,
-                              (void*)&region,
+                              (const void*)&region,
                               loggerFn,
                               (void*)&vStream,
-                              (void*)MII,
+                              (const void*)MII,
                               address,
                               fMode);