Add builtin definition for scanf, including extending the builtin encoding to
represent builtins that have the "scanf" attribution (via the format attribute) just
like we do with printf functions.  Follow-up work is needed to add similar support
for fscanf et al.

This is to support format-string checking for scanf functions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108499 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed