diff options
| author | msebor <msebor@138bc75d-0d04-0410-961f-82ee72b054a4> | 2018-02-27 22:28:21 +0000 |
|---|---|---|
| committer | msebor <msebor@138bc75d-0d04-0410-961f-82ee72b054a4> | 2018-02-27 22:28:21 +0000 |
| commit | 776284072c63dc812889bdf8383e728790bee305 (patch) | |
| tree | 62d47ef8a95d209046feec191ee55fbe477706c7 /gcc/doc/invoke.texi | |
| parent | f4e3e4b13a0f666c5f4217e539436667cd4052ea (diff) | |
PR c++/83871 - wrong code for attribute const and pure on distinct template specializations
PR c++/83503 - [8 Regression] bogus -Wattributes for const and pure on function template specialization
gcc/ChangeLog:
PR c++/83871
* gcc/doc/invoke.texi (-Wmissing-attributes): New option.
* gcc/print-tree.c (print_node): Handle DECL_UNINLINABLE.
gcc/c-family/ChangeLog:
PR c++/83871
* c.opt (-Wmissing-attributes): New option.
gcc/cp/ChangeLog:
PR c++/83871
PR c++/83503
* cp-tree.h (warn_spec_missing_attributes): New function.
((check_explicit_specialization): Add an argument. Call the above
function.
* decl.c (duplicate_decls): Avoid applying primary function template's
attributes to its explicit specializations.
cp/pt.c (warn_spec_missing_attributes): Define.
gcc/testsuite/ChangeLog:
PR c++/83871
PR c++/83503
* g++.dg/Wmissing-attributes.C: New test.
* g++.dg/ext/attr-const-pure.C: New test.
* g++.dg/ext/attr-const.C: New test.
* g++.dg/ext/attr-deprecated-2.C: New test.
* g++.dg/ext/attr-malloc-2.C: New test.
* g++.dg/ext/attr-malloc.C: New test.
* g++.dg/ext/attr-noinline-2.C: New test.
* g++.dg/ext/attr-noinline.C: New test.
* g++.dg/ext/attr-nonnull.C: New test.
* g++.dg/ext/attr-noreturn-2.C: New test.
* g++.dg/ext/attr-noreturn.C: New test.
* g++.dg/ext/attr-nothrow-2.C: New test.
* g++.dg/ext/attr-nothrow.C: New test.
* g++.dg/ext/attr-optimize.C: New test.
* g++.dg/ext/attr-pure.C: New test.
* g++.dg/ext/attr-returns-nonnull.C: New test.
* g++.dg/ext/attr-warning.C: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@258045 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index e70e2bad4d82..8d366c626bae 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -295,7 +295,7 @@ Objective-C and Objective-C++ Dialects}. -Winvalid-pch -Wlarger-than=@var{len} @gol -Wlogical-op -Wlogical-not-parentheses -Wlong-long @gol -Wmain -Wmaybe-uninitialized -Wmemset-elt-size -Wmemset-transposed-args @gol --Wmisleading-indentation -Wmissing-braces @gol +-Wmisleading-indentation -Wmissing-attributes -Wmissing-braces @gol -Wmissing-field-initializers -Wmissing-include-dirs @gol -Wno-multichar -Wmultistatement-macros -Wnonnull -Wnonnull-compare @gol -Wnormalized=@r{[}none@r{|}id@r{|}nfc@r{|}nfkc@r{]} @gol @@ -3928,6 +3928,7 @@ Options} and @ref{Objective-C and Objective-C++ Dialect Options}. -Wmemset-elt-size @gol -Wmemset-transposed-args @gol -Wmisleading-indentation @r{(only for C/C++)} @gol +-Wmissing-attributes @gol -Wmissing-braces @r{(only for C/ObjC)} @gol -Wmultistatement-macros @gol -Wnarrowing @r{(only for C++)} @gol @@ -4591,6 +4592,36 @@ about the layout of the file that the directive references. This warning is enabled by @option{-Wall} in C and C++. +@item -Wmissing-attributes +@opindex Wmissing-attributes +@opindex Wno-missing-attributes +Warn when a declaration of a function is missing one or more attributes +that a related function is declared with and whose absence may adversely +affect the correctness or efficiency of generated code. For example, in +C++, the warning is issued when an explicit specialization of a primary +template declared with attribute @code{alloc_align}, @code{alloc_size}, +@code{assume_aligned}, @code{format}, @code{format_arg}, @code{malloc}, +or @code{nonnull} is declared without it. Attributes @code{deprecated}, +@code{error}, and @code{warning} suppress the warning. +(@pxref{Function Attributes}). + +@option{-Wmissing-attributes} is enabled by @option{-Wall}. + +For example, since the declaration of the primary function template +below makes use of both attribute @code{malloc} and @code{alloc_size} +the declaration of the explicit specialization of the template is +diagnosed because it is missing one of the attributes. + +@smallexample +template <class T> +T* __attribute__ ((malloc, alloc_size (1))) +allocate (size_t); + +template <> +void* __attribute__ ((malloc)) // missing alloc_size +allocate<void> (size_t); +@end smallexample + @item -Wmissing-braces @opindex Wmissing-braces @opindex Wno-missing-braces |