This is the first instalment of a set which goal is to track locations
of tokens across macro expansions. Tom Tromey did the original work
and attached the patch to PR preprocessor/7263. This opus is a
derivative of that original work.
This patch modifies the linemap module of libcpp to add virtual
locations support.
A virtual location is a mapped location that can resolve to several
different physical locations. It can always resolve to the spelling
location of a token. For tokens resulting from macro expansion it can
resolve to:
- either the location of the expansion point of the macro.
- or the location of the token in the definition of the
macro
- or, if the token is an argument of a function-like macro,
the location of the use of the matching macro parameter in
the definition of the macro
The patch creates a new type of line map called a macro map. For every
single macro expansion, there is a macro map that generates a virtual
location for every single resulting token of the expansion.
The good old type of line map we all know is now called an ordinary
map. That one still encodes spelling locations as it has always had.
As a result linemap_lookup as been extended to return a macro map when
given a virtual location resulting from a macro expansion. The layout
of structs line_map has changed to support this new type of map. So
did the layout of struct line_maps. Accessor macros have been
introduced to avoid messing with the implementation details of these
datastructures directly. This helped already as we have been testing
different ways of arranging these datastructure. Having to constantly
adjust client code that is too tied with the internals of line_map and
line_maps would have been even more painful.
Of course, many new public functions have been added to the linemap
module to handle the resolution of virtual locations.
This patch introduces the infrastructure but no part of the compiler
uses virtual locations yet.
However the client code of the linemap data structures has been
adjusted as per the changes. E.g, it's not anymore reliable for a
client code to manipulate struct line_map directly if it just wants to
deal with spelling locations, because struct line_map can now
represent a macro map as well. In that case, it's better to use the
convenient API to resolve the initial (possibly virtual) location to a
spelling location (or to an ordinary map) and use that.
This is the reason why the patch adjusts the Java, Ada and Fortran
front ends.
Also, note that virtual locations are not supposed to be ordered for
relations '<' and '>' anymore. To test if a virtual location appears
"before" another one, one has to use a new operator exposed by the
line map interface. The patch updates the only spot (in the
diagnostics module) I have found that was making the assumption that
locations were ordered for these relations. This is the only change
that introduces a use of the new line map API in this patch, so I am
adding a regression test for it only.
From-SVN: r180081
libcpp/
* line-map.c (linemap_add): Assert that reason must not be
LC_RENAME when called for the first time on a "main input file".
c-family/
* c-pch.c (c_common_read_pch): Call linemap_add with LC_ENTER as it's
the first time it's being called on this main TU.
gcc/lto/
* lto-lang.c (lto_init): Likewise. Also, avoid calling
linemap_add twice.
gcc/fortran/
* scanner.c (load_file): Don't abuse LC_RENAME reason while
(indirectly) calling linemap_add.
From-SVN: r178146
Use it to force BUILTINS_LOCATION when declaring builtins instead of creating a <built-in> entry in the line_table which is wrong.
* c-opts.c (c_finish_options): Force BUILTINS_LOCATION for tokens
defined in cpp_init_builtins and c_cpp_builtins.
gcc/fortran/ChangeLog
* cpp.c (gfc_cpp_init): Force BUILTINS_LOCATION for tokens
defined in cpp_define_builtins.
libcpp/ChangeLog
* init.c (cpp_create_reader): Inititalize forced_token_location_p.
* internal.h (struct cpp_reader): Add field forced_token_location_p.
* lex.c (_cpp_lex_direct): Use forced_token_location_p.
(cpp_force_token_locations): New.
(cpp_stop_forcing_token_locations): New.
From-SVN: r177973
LINEMAP_POSITION_FOR_COLUMN had the exact same effect as
linemap_position_for_column, removed it and updated users
to use linemap_position_for_column instead
libcpp/ChangeLog
* include/line-map.h (LINEMAP_POSITION_FOR_COLUMN): Remove.
Update all users to use linemap_position_for_column instead.
gcc/go/ChangeLog
* gofrontend/lex.cc (Lex::location): Update to use
linemap_position_for_column instead.
(Lex::earlier_location): Likewise.
From-SVN: r177768
gcc/
2011-07-28 H.J. Lu <hongjiu.lu@intel.com>
* config.gcc: Set need_64bit_hwint to yes for x86 targets.
libcpp/
2011-07-28 H.J. Lu <hongjiu.lu@intel.com>
* configure.ac: Set need_64bit_hwint to yes for x86 targets.
* configure: Regenerated.
From-SVN: r176871
* system.h [__cplusplus]: Wrap C function declarations in extern "C".
-This line, and those below, will be ignored--
M ChangeLog
M system.h
From-SVN: r176748
libcpp/
* directives.c (struct if_stack): Use source_location as type
here.
* include/cpplib.h (struct cpp_callbacks)<include, define, undef,
indent, def_pragma, used_define, used_undef>: Properly use
source_location as parameter type, rather than unsigned int.
From-SVN: r176333
PR preprocessor/48532
libcpp/
* directives.c (do_pragma): Don't forget the invocation location
when parsing the pragma name of a namespaced pragma directive.
gcc/testsuite/
* gcc.dg/cpp/pragma-3.c: New test case.
From-SVN: r174694
PR target/49104
* config/i386/cpuid.h (bit_MMXEXT): New define.
libcpp/ChangeLog:
2011-05-22 Uros Bizjak <ubizjak@gmail.com>
PR target/49104
* lex.c (init_vectorized_lexer): Do not set "minimum" when __3dNOW_A__
is defined. Check bit_MMXEXT and bit_CMOV to use search_line_mmx.
From-SVN: r174032
PR preprocessor/48740
* lex.c (lex_raw_string): When raw string ends with
??) followed by raw prefix and ", ensure it is preprocessed
with ??) rather than ??].
* c-c++-common/raw-string-11.c: New test.
From-SVN: r172903
Change "if (E) free (E);" to "free (E);" everywhere except in the
libgo/, intl/, zlib/ and classpath/ directories.
Also transform equivalent variants like
"if (E != NULL) free (E);" and allow an extra cast on the
argument to free. Otherwise, the tested and freed "E"
expressions must be identical, modulo white space.
From-SVN: r172785
2011-03-25 Kai Tietz <ktietz@redhat.com>
* files.c (file_hash_eq): Use filename_cmp
instead of strcmp.
(nonexistent_file_hash_eq): Likewise.
(remap_filename): Likewise.
Handle absolute DOS-path,
(append_file_to_dir): Check for IS_DIR_SEPARATOR
instead of slash.
(read_name_map): Likewise.
* linemap.c (linemap_add): Use filename_cmp
instead of strcmp.
* mkdeps.c (apply_vpath): Use filename_ncmp
instead of strncmp.
(deps_restore): Use filename_cmp instead of
strcmp.
* init.c (read_original_directory): Use
IS_DIR_SEPARATOR instead of checking for slash.
From-SVN: r171521
PR preprocessor/39213
* directives.c (end_directive): Call _cpp_remove_overlay for deferred
pragmas as well in traditional mode.
Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
From-SVN: r168490
2010-09-29 Kai Tietz <kai.tietz@onevision.com>
PR preprocessor/45362
* directives.c (cpp_pop_definition): Make static.
(do_pragma_push_macro): Reworked to store text
definition.
(do_pragma_pop_macro): Add free text definition.
(cpp_push_definition): Removed.
* include/cpplib.h (cpp_push_definition): Removed.
(cpp_pop_definition): Likewise.
* internal.h (def_pragma_macro): Remove member 'value'
and add new members 'definition', 'line',
'syshdr', 'sued' and 'is_undef'.
* pch.c (_cpp_restore_pushed_macros): Rework to work
on text definition and store additional macro flags.
(_cpp_save_pushed_macros): Likewise.
From-SVN: r164729
Tom Tromey
Dodji Seketeli
Gabriel Charette
Rainer Orth
Joseph Myers
H.J. Lu
Jason Merrill
John Tytgat
Uros Bizjak
Jan Kratochvil
Jakub Jelinek
Jim Meyering
Kai Tietz
Michael Meissner
Richard Henderson
Eric Botcazou
Jakub Jelinek
Ian Lance Taylor
Kai Tietz
Basile Starynkevitch