fix cmplog for llvm 11-dev

docs/Changelog.md

@@ -23,6 +23,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
       feature is used.
     - lowered minimum required llvm version to 3.4 (except LLVMInsTrim,
       which needs 3.8.0)
+    - small change to cmplog to make it work with current llvm 11-dev
   - fixed afl-gcc/afl-as that could break on fast systems reusing pids in
     the same second
   - added lots of dictionaries from oss-fuzz, go-fuzz and Jakub Wilk

llvm_mode/afl-llvm-rt.o.c

@@ -892,7 +892,7 @@ static int area_is_mapped(void *ptr, size_t len) {
 
 }
 
-void __cmplog_rtn_hook(void *ptr1, void *ptr2) {
+void __cmplog_rtn_hook(u8 *ptr1, u8 *ptr2) {
 
   if (!__afl_cmp_map) return;
 

llvm_mode/cmplog-routines-pass.cc

@@ -94,15 +94,16 @@ bool CmpLogRoutines::hookRtns(Module &M) {
   LLVMContext &           C = M.getContext();
 
   Type *VoidTy = Type::getVoidTy(C);
-  PointerType *VoidPtrTy = PointerType::get(VoidTy, 0);
+  // PointerType *VoidPtrTy = PointerType::get(VoidTy, 0);
+  IntegerType *Int8Ty = IntegerType::getInt8Ty(C);
+  PointerType *i8PtrTy = PointerType::get(Int8Ty, 0);
 
 #if LLVM_VERSION_MAJOR < 9
   Constant *
 #else
   FunctionCallee
 #endif
-      c = M.getOrInsertFunction("__cmplog_rtn_hook", VoidTy, VoidPtrTy,
-                                VoidPtrTy
+      c = M.getOrInsertFunction("__cmplog_rtn_hook", VoidTy, i8PtrTy, i8PtrTy
 #if LLVM_VERSION_MAJOR < 5
                                 ,
                                 NULL