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Add warning flag -Wordered-compare-function-pointers. 

The C standard doesn't allow comparisons like "f1 < f2" (where f1 and f2
are function pointers), but we allow them as an extension.  Add a
warning flag to control this warning.

Differential Revision: https://reviews.llvm.org/D46155

llvm-svn: 331570
This commit is contained in:
Eli Friedman 2018-05-05 00:09:51 +00:00
parent b77ab0966e
commit b6e64e734d
2 changed files with 3 additions and 3 deletions
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3
clang/include/clang/Basic/DiagnosticSemaKinds.td
View File

@ -5932,7 +5932,8 @@ def ext_typecheck_ordered_comparison_of_pointer_and_zero : Extension<
def err_typecheck_ordered_comparison_of_pointer_and_zero : Error<
"ordered comparison between pointer and zero (%0 and %1)">;
def ext_typecheck_ordered_comparison_of_function_pointers : ExtWarn<
"ordered comparison of function pointers (%0 and %1)">;
"ordered comparison of function pointers (%0 and %1)">,
InGroup<DiagGroup<"ordered-compare-function-pointers">>;
def ext_typecheck_comparison_of_fptr_to_void : Extension<
"equality comparison between function pointer and void pointer (%0 and %1)">;
def err_typecheck_comparison_of_fptr_to_void : Error<

3
clang/test/Misc/warning-flags.c
View File

@ -18,7 +18,7 @@ This test serves two purposes:
The list of warnings below should NEVER grow. It should gradually shrink to 0.
CHECK: Warnings without flags (77):
CHECK: Warnings without flags (76):
CHECK-NEXT: ext_excess_initializers
CHECK-NEXT: ext_excess_initializers_in_char_array_initializer
CHECK-NEXT: ext_expected_semi_decl_list
@ -31,7 +31,6 @@ CHECK-NEXT: ext_plain_complex
CHECK-NEXT: ext_template_arg_extra_parens
CHECK-NEXT: ext_typecheck_comparison_of_pointer_integer
CHECK-NEXT: ext_typecheck_cond_incompatible_operands
CHECK-NEXT: ext_typecheck_ordered_comparison_of_function_pointers
CHECK-NEXT: ext_typecheck_ordered_comparison_of_pointer_integer
CHECK-NEXT: ext_using_undefined_std
CHECK-NEXT: pp_invalid_string_literal