[PATCH] Add new -Wformat warning for invalid type passed to a non-literal format string

[Richard Trieu]

Currently, when the format string is a non-literal, the only warning emitted and checked for is the non-literal format string.  This patch checks the arguments passed to printf/scanf functions and checks that they are valid for the format string.  For instance, warning on user defined types or non-pointers to scanf functions.  Additionally, if only one argument is present, warn if it is a va_list.  For built-in functions, suggest the proper va_list function to fix it.

http://reviews.llvm.org/D8757

Files:
  include/clang/Basic/DiagnosticSemaKinds.td
  include/clang/Sema/Sema.h
  lib/Sema/SemaChecking.cpp
  test/SemaCXX/format-strings-invalid-args.cpp

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