If the DECL_VALUE_EXPR of a VAR_DECL has EXPR_LOCATION set, then any use of
that variable looks like it has that location, which leads to the debugger
jumping back and forth for both lambdas and structured bindings.
Rather than fix all the uses, it seems simplest to remove any EXPR_LOCATION
when setting DECL_VALUE_EXPR. So the cp/ hunks aren't necessary, but they
avoid the need to unshare to remove the location.
PR c++/84471
PR c++/107504
gcc/cp/ChangeLog:
* coroutines.cc (transform_local_var_uses): Don't
specify a location for DECL_VALUE_EXPR.
* decl.cc (cp_finish_decomp): Likewise.
gcc/ChangeLog:
* fold-const.cc (protected_set_expr_location_unshare): Not static.
* tree.h: Declare it.
* tree.cc (decl_value_expr_insert): Use it.
include/ChangeLog:
* ansidecl.h (ATTRIBUTE_WARN_UNUSED_RESULT): Add __.
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/value-expr1.C: New test.
* g++.dg/tree-ssa/value-expr2.C: New test.
* g++.dg/analyzer/pr93212.C: Move warning.
libiberty's ansidecl.h provides macros FINAL and OVERRIDE to allow
virtual functions to be labelled with the C++11 "final" and "override"
specifiers, but with empty implementations on pre-C++11 C++ compilers.
We've used the macros in many places in GCC, but as of as of GCC 11
onwards GCC has required a C++11 compiler, such as GCC 4.8 or later.
On the assumption that any such compiler correctly implements "final"
and "override", I've simplified GCC's codebase by replacing all uses of
the FINAL and OVERRIDE macros in GCC's source tree with the lower-case
specifiers (via commits r13-690-gff171cb13df671 and
r13-716-g8473ef7be60443)
The macros are reportedly not used anywhere in binutils-gdb.
This patch completes this transition for GCC by eliminating the macros
from ansidecl.h.
include/ChangeLog:
* ansidecl.h: Drop macros OVERRIDE and FINAL.
Signed-off-by: David Malcolm <dmalcolm@redhat.com>
This quashes -Wundef warnings in ansidecl.h when compiled in C or C++.
In C, __cpp_constexpr and __cplusplus aren't defined so we evaluate
them to 0; conversely, __STDC_VERSION__ is not defined in C++.
This has caused grief when -Wundef is used with -Werror.
I've also tested -traditional-cpp.
include/ChangeLog:
* ansidecl.h: Check if __cplusplus is defined before checking
the value of __cpp_constexpr and __cplusplus. Don't check
__STDC_VERSION__ in C++.
We have many classes that copy cotr and assignment operator are deleted
in different projects, gcc, gdb and gold. So this patch adds a macro
to do this, and replace these existing mechanical code with macro
DISABLE_COPY_AND_ASSIGN.
The patch was posted in gdb-patches,
https://sourceware.org/ml/gdb-patches/2017-07/msg00254.html but we
think it is better to put this macro in include/ansidecl.h so that
other projects can use it too.
include:
2017-09-15 Yao Qi <yao.qi@linaro.org>
Pedro Alves <palves@redhat.com>
* ansidecl.h (DISABLE_COPY_AND_ASSIGN): New macro.
Co-Authored-By: Pedro Alves <palves@redhat.com>
From-SVN: r252823
So that GDB and other projects that share the top level can use them.
Bootstrapped with all default languages + jit on x86-64 Fedora 23.
gcc/ChangeLog:
2016-10-14 Pedro Alves <palves@redhat.com>
* coretypes.h (OVERRIDE, FINAL): Delete, moved to
include/ansidecl.h.
include/ChangeLog:
2016-10-14 Pedro Alves <palves@redhat.com>
* ansidecl.h (GCC_FINAL): Delete.
(OVERRIDE, FINAL): New, moved from gcc/coretypes.h.
From-SVN: r241166
Fix PR65261
Running bootstrap-ubsan on ppc64le shows many instances of:
libcpp/lex.c:552:30: runtime error: load of misaligned address
0x01001f31d37a for type 'const uchar', which requires 16 byte alignment
But the unaligned vector loads are intended in this case, because they
are preferable to forced-alignment on POWER8. So just silence the ubsan
errors.
2015-03-02 Markus Trippelsdorf <markus@trippelsdorf.de>
include/
PR target/65261
* ansidecl.h (ATTRIBUTE_NO_SANITIZE_UNDEFINED): New macro.
libcpp/
PR target/65261
* lex.c (search_line_fast): Silence ubsan errors.
From-SVN: r221190
* ansidecl.h: Add extern "C" when compiling with C++. Treat C++
the way we treat an ISO C compiler. Don't define inline as a
macdro when compiling with C++.
* dyn-string.h: Add header guard DYN_STRING_H. Add extern "C"
when compiling with C++.
* fibheap.h: Add extern "C" when compiling with C++.
From-SVN: r148032
include/
2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net>
* libiberty.h (ACONCAT): Properly cast value of alloca().
* ansidecl.h (ATTRIBUTE_UNUSED_LABEL): Don't define if
__cplusplus.
libiberty/
2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net>
* configure.ac: Check declarations for calloc(), getenv(),
malloc(), realloc() and sbrk().
* config.in: Regenerate.
* configure: Likewise.
* alloca.c (C_alloca): Change "new" to "new_storage". Use XNEWVEC
instead of xmalloc.
* choose-temp.c (choose_temp_base): Use XNEWVEC instea od xmalloc.
* concat.c (liiberty_concat_ptr): Surround definition with an
extern "C" block, if __cplusplus.
(concat): Use XNEWVEC instead of xmalloc.
(reconcat): Likewise.
* cp-demangle.c (struct d_print_template): Rename member
"template" to "template_decl". Adjust use throughout the file.
(d_print_resize): Properly cast return value of realloc().
(cplus_demangle_print): Same for malloc().
(d_demangle): Likewise.
* cp-demint.c (cplus_demangle_fill_builtin_type): Rename parameter
"typename" to "type_name".
* cplus-dem.c (grow_vect): Use XRESIZEVEC instead of xrealloc().
(work_stuff_copy_to_from): Use XNEWVEC insteand of xmalloc().
(demangle_template_value_parm): Likewise.
(demangle_template): Likewise.
(recursively_demangle): Likewise.
(do_hpacc_template_literal): Likewise.
(do_arg): Likewise.
(remember_type): Likewise.
(remember_Ktype): Likewise.
(register_Btype): Likewise.
(string_need): Use XRESIZEVEC instead of xrealloc().
* dyn-string.c (dyn_string_init): Use XNEWVEC.
(dyn_string_new): Use XNEW.
(dyn_string_resize): Use XRESIZEVEC.
* fnmatch.c (fnmatch): Rename local variable "not" to "negate".
* getopt.c (getenv): Declare only if !__cplusplus and !getenv.
Otherwise include <stdlib.h>.
(exchange): Cast return value of malloc().
* hashtab.c (htab_size): Define as both macro and non-inline
function.
(htab_elements): Likewise.
* getpwd.c (getpwd): Use XNEWVEC.
(htab_create_alloc_ex): Use C90 prototype-style.
* lrealpath.c (lrealpath): Appropriately cast return value of
malloc().
* make-relative-prefix.c (save_string): Likewise.
* make-temp-file.c (try_dir): Rename from "try". Adjust use in
the file.
(choose_tmpdir): Use XNEWVEC.
* mkstemps.c (mkstemps): Rename parameter "template" to "pattern".
* pex-common.c (pex_init_common): Use XNEW.
(pex_add_remove): Use XRESIZEVEC.
(pex_run): Likewise.
(pex_get_status_and_time): Likewise.
* pex-djgpp.c (pex_djgpp_exec_child): Likewise.
* pex-msdos.c (pex_init): Use XNEW.
(pex_msdos_exec_child): Likewise.
(pex_msdos_exec_child): Use XRESIZEVEC.
* pex-unix.c (pex_wait): Use XNEW.
* pex-win32.c (fix_argv): Use XNEWVEC.
* pexecute.c (pwait): Likewise.
* setenv.c (setenv): Properly cast return value of malloc().
* sigsetmask.c (sigsetmask): Rename local variables "old" and
"new" to "old_sig" and "new_sig".
* sort.c (main): Use XNEWVEC.
* spaces.c (spaces): Cast return value of malloc().
* strndup.c (strndup): Likewise.
* ternary.c (ternary_insert): Use XNEW.
* xmalloc.c (malloc, realloc, calloc, sbrk): Surround declaration
with an extern "C" block if __cplusplus.
* xstrdup.c (xstrdup): Cast return value of memcpy().
* xstrerror.c (strerror): Enclose declaration in an extern "C"
block if __cplusplus.
* xstrndup.c (xstrndup): Use XNEW. Cast return value of memcpy().
From-SVN: r100115
* ansidecl.h (__STDC__): Add (__alpha && __cplusplus) to the
list of platform compilers that may look, smell and act
like __STDC__ but that may not define it.
From-SVN: r58513
include:
* ansidecl.h: Reorganize for readability, remove documentation
of obsolete macros, document PARAMS and VPARAMS. Add new
macros VA_OPEN, VA_CLOSE, and VA_FIXEDARG for nicer variadic
function implementation.
gcc:
* cpperror.c: Use VA_OPEN/VA_CLOSE/VA_FIXEDARG throughout.
From-SVN: r45011
