PR tree-optimization/19967
* builtins.c (expand_builtin_strstr, expand_builtin_strpbrk,
expand_builtin_strchr, expand_builtin_strrchr): Take a new
argument TYPE. Adjust calls to fold_builtin_XXX.
(expand_builtin, fold_builtin_1): Adjust calls to
expand_builtin_XXX.
(fold_builtin_strchr, fold_builtin_strpbrk,
fold_builtin_strstr, fold_builtin_strrchr): Convert the folded
result to a requested type TYPE.
* testsuite/gcc.dg/pr19967.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@95109 138bc75d-0d04-0410-961f-82ee72b054a4