diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index 50cf0889c7..885cb96c1a 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -243,6 +243,7 @@
 #  define Q_REQUIRED_RESULT __attribute__ ((__warn_unused_result__))
 #  define Q_DECL_PURE_FUNCTION __attribute__((pure))
 #  define Q_DECL_CONST_FUNCTION __attribute__((const))
+#  define Q_DECL_COLD_FUNCTION __attribute__((cold))
 #  if !defined(QT_MOC_CPP)
 #    define Q_PACKED __attribute__ ((__packed__))
 #    ifndef __ARM_EABI__
@@ -1275,6 +1276,9 @@
 #ifndef Q_DECL_CONST_FUNCTION
 #  define Q_DECL_CONST_FUNCTION Q_DECL_PURE_FUNCTION
 #endif
+#ifndef Q_DECL_COLD_FUNCTION
+#  define Q_DECL_COLD_FUNCTION
+#endif
 #ifndef QT_MAKE_UNCHECKED_ARRAY_ITERATOR
 #  define QT_MAKE_UNCHECKED_ARRAY_ITERATOR(x) (x)
 #endif
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 203c9a9da4..d439085dbc 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -706,7 +706,7 @@ inline void qt_noop(void) {}
 #  define QT_CATCH(A) catch (A)
 #  define QT_THROW(A) throw A
 #  define QT_RETHROW throw
-Q_NORETURN Q_CORE_EXPORT void qTerminate() Q_DECL_NOTHROW;
+Q_NORETURN Q_DECL_COLD_FUNCTION Q_CORE_EXPORT void qTerminate() Q_DECL_NOTHROW;
 #  ifdef Q_COMPILER_NOEXCEPT
 #    define QT_TERMINATE_ON_EXCEPTION(expr) do { expr; } while (false)
 #  else
@@ -749,11 +749,13 @@ Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qSharedBuild() Q_DECL_NOTHROW;
 #endif
 
 class QString;
+Q_DECL_COLD_FUNCTION
 Q_CORE_EXPORT QString qt_error_string(int errorCode = -1);
 
 #ifndef Q_CC_MSVC
 Q_NORETURN
 #endif
+Q_DECL_COLD_FUNCTION
 Q_CORE_EXPORT void qt_assert(const char *assertion, const char *file, int line) Q_DECL_NOTHROW;
 
 #if !defined(Q_ASSERT)
@@ -771,6 +773,7 @@ Q_CORE_EXPORT void qt_assert(const char *assertion, const char *file, int line)
 #ifndef Q_CC_MSVC
 Q_NORETURN
 #endif
+Q_DECL_COLD_FUNCTION
 Q_CORE_EXPORT void qt_assert_x(const char *where, const char *what, const char *file, int line) Q_DECL_NOTHROW;
 
 #if !defined(Q_ASSERT_X)
@@ -782,6 +785,7 @@ Q_CORE_EXPORT void qt_assert_x(const char *where, const char *what, const char *
 #endif
 
 Q_NORETURN Q_CORE_EXPORT void qt_check_pointer(const char *, int) Q_DECL_NOTHROW;
+Q_DECL_COLD_FUNCTION
 Q_CORE_EXPORT void qBadAlloc();
 
 #ifdef QT_NO_EXCEPTIONS
diff --git a/src/corelib/global/qlogging.h b/src/corelib/global/qlogging.h
index 0c8d7dab38..16e01183bd 100644
--- a/src/corelib/global/qlogging.h
+++ b/src/corelib/global/qlogging.h
@@ -97,7 +97,9 @@ public:
     void noDebug(const char *, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(2, 3)
     {}
     void info(const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
+    Q_DECL_COLD_FUNCTION
     void warning(const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
+    Q_DECL_COLD_FUNCTION
     void critical(const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
 
     typedef const QLoggingCategory &(*CategoryFunction)();
@@ -106,14 +108,19 @@ public:
     void debug(CategoryFunction catFunc, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
     void info(const QLoggingCategory &cat, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
     void info(CategoryFunction catFunc, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
+    Q_DECL_COLD_FUNCTION
     void warning(const QLoggingCategory &cat, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
+    Q_DECL_COLD_FUNCTION
     void warning(CategoryFunction catFunc, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
+    Q_DECL_COLD_FUNCTION
     void critical(const QLoggingCategory &cat, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
+    Q_DECL_COLD_FUNCTION
     void critical(CategoryFunction catFunc, const char *msg, ...) const Q_ATTRIBUTE_FORMAT_PRINTF(3, 4);
 
 #ifndef Q_CC_MSVC
     Q_NORETURN
 #endif
+    Q_DECL_COLD_FUNCTION
     void fatal(const char *msg, ...) const Q_DECL_NOTHROW Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
 
 #ifndef QT_NO_DEBUG_STREAM
@@ -179,8 +186,8 @@ private:
 Q_CORE_EXPORT void qt_message_output(QtMsgType, const QMessageLogContext &context,
                                      const QString &message);
 
-Q_CORE_EXPORT void qErrnoWarning(int code, const char *msg, ...);
-Q_CORE_EXPORT void qErrnoWarning(const char *msg, ...);
+Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(int code, const char *msg, ...);
+Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(const char *msg, ...);
 
 #if QT_DEPRECATED_SINCE(5, 0)// deprecated. Use qInstallMessageHandler instead!
 typedef void (*QtMsgHandler)(QtMsgType, const char *);