Index: lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc
===================================================================
--- lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc
+++ lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc
@@ -76,7 +76,8 @@
 // malloc and thread-local storage, which is not a good thing to do during
 // symbolication.
 static void InitializeSwiftDemangler() {
-  swift_demangle_f = (swift_demangle_ft)dlsym(RTLD_DEFAULT, "swift_demangle");
+  uint64_t ptr = (uint64_t) dlsym(RTLD_DEFAULT, "swift_demangle");
+  swift_demangle_f = (swift_demangle_ft) ptr;
 }
 
 // Attempts to demangle a Swift name. The demangler will return nullptr if a
Index: lib/stats/stats_client.cc
===================================================================
--- lib/stats/stats_client.cc
+++ lib/stats/stats_client.cc
@@ -31,11 +31,14 @@
 
 namespace {
 
-void *LookupSymbolFromMain(const char *name) {
+typedef void (*void_fnptr)();
+
+void_fnptr LookupSymbolFromMain(const char *name) {
 #ifdef _WIN32
-  return reinterpret_cast<void *>(GetProcAddress(GetModuleHandle(0), name));
+  return (void_fnptr) GetProcAddress(GetModuleHandle(0), name);
 #else
-  return dlsym(RTLD_DEFAULT, name);
+  uint64_t ptr = (uint64_t) dlsym(RTLD_DEFAULT, name);
+  return (void_fnptr) ptr;
 #endif
 }