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Gabriel F. T. Gomes ab41100bab math: Replace const attribute with pure in totalorder* functions
Since the commit

commit 42760d7646
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Aug 15 15:18:34 2019 +0000

    Make totalorder and totalordermag functions take pointer arguments.

the test case math/test-totalorderl-ldbl-128ibm fails on every input
pair, when compiled with -O2, which is the case for glibc test suite.

Debugging showed that the test case is passing arguments incorrectly to
totalorderl.  This can also be inferred by the fact that compiling the
test case with -O0 hides the bug.

The documentation for the const attribute in GCC manual reads:

  Note that a function that has pointer arguments and examines the data
  pointed to must not be declared const if the pointed-to data might
  change between successive invocations of the function. In general,
  since a function cannot distinguish data that might change from data
  that cannot, const functions should never take pointer or, in C++,
  reference arguments. Likewise, a function that calls a non-const
  function usually must not be const itself.

Since the pointed-to data is likely to be changed by user code between
invocations of totalorder*, this patch removes the const attribute from
the declarations of all totalorder functions, replacing it with the pure
attribute, as suggested in the manual:

  The pure attribute imposes similar but looser restrictions on a
  function’s definition than the const attribute: pure allows the
  function to read any non-volatile memory, even if it changes in
  between successive invocations of the function.

Tested for powerpc64le and x86_64.
2019-09-05 11:21:54 -03:00
argp Fix gcc 9 build errors for make xcheck. [BZ #24556] 2019-06-19 12:32:04 +02:00
assert Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
benchtests Use generic memset/memcpy/memmove in benchtests 2019-08-30 17:21:35 +01:00
bits login: Add nonstring attributes to struct utmp, struct utmpx [BZ #24899] 2019-08-15 16:09:43 +02:00
catgets Add some spaces before '('. 2019-02-27 13:55:45 +00:00
ChangeLog.old Correct the spelling of more contributors 2019-08-29 02:50:04 -07:00
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dirent Linux: Move getdents64 to <dirent.h> 2019-07-29 21:02:46 +02:00
dlfcn dlfcn: Avoid one-element flexible array in Dl_serinfo [BZ #24166] 2019-06-19 10:13:50 +02:00
elf MIPS support for GNU hash 2019-08-29 20:11:42 +00:00
gmon linux: Make profil_counter a compat_symbol (BZ#17726) 2019-08-23 11:30:56 -03:00
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iconv iconv: Revert steps array reference counting changes 2019-07-31 11:43:59 +02:00
iconvdata Add some spaces before '('. 2019-02-27 13:55:45 +00:00
include Finish move of clock_* functions to libc. [BZ #24959] 2019-09-04 14:39:38 +02:00
inet Add INADDR_ALLSNOOPERS_GROUP from Linux 5.1 to netinet/in.h. 2019-06-03 11:16:02 +00:00
intl intl: Do not return NULL on asprintf failure in gettext [BZ #24018] 2019-01-02 16:26:58 +01:00
io Add AT_RECURSIVE from Linux 5.2 to fcntl.h. 2019-08-06 21:17:59 +00:00
libio iconv: Revert steps array reference counting changes 2019-07-31 11:43:59 +02:00
locale localedef: Use initializer for flexible array member [BZ #24950] 2019-09-03 14:01:47 +02:00
localedata Chinese locales: Set first_weekday to 2 (bug 24682). 2019-08-23 00:07:06 +02:00
login login: pututxline could fail to overwrite existing entries [BZ #24902] 2019-08-28 11:59:45 +02:00
mach Break some lines before not after operators. 2019-02-22 01:32:36 +00:00
malloc malloc: Various cleanups for malloc/tst-mxfast 2019-08-15 11:37:18 +02:00
manual Correct the spelling of more contributors 2019-08-29 02:50:04 -07:00
math math: Replace const attribute with pure in totalorder* functions 2019-09-05 11:21:54 -03:00
mathvec Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
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nptl_db Move remaining nptl_db headers to sysdeps/nptl 2019-02-16 08:25:16 +01:00
nscd nscd: Improve nscd.conf comments. 2019-08-19 09:57:58 -04:00
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rt Finish move of clock_* functions to libc. [BZ #24959] 2019-09-04 14:39:38 +02:00
scripts build-many-glibcs.py: Use Linux 5.2 by default 2019-07-24 10:59:45 +02:00
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signal Linux: Add the tgkill function 2019-05-14 22:55:51 +02:00
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stdio-common Prepare vfprintf to use __printf_fp/__printf_fphex with float128 arg 2019-06-27 17:51:59 -03:00
stdlib Fix spellings of contributor names in comments and doc 2019-08-23 13:11:05 -07:00
string Use generic memset/memcpy/memmove in benchtests 2019-08-30 17:21:35 +01:00
sunrpc Remove qualifier from function return type in tst-svc_register.c. 2019-02-15 13:45:19 +00:00
support support: Include <support/descriptors.h> in support_descriptors.c 2019-08-14 16:24:46 +02:00
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wcsmbs iconv: Revert steps array reference counting changes 2019-07-31 11:43:59 +02:00
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abi-tags Remove the bulk of the NaCl port. 2017-05-20 08:09:10 -04:00
aclocal.m4 LIBC_SLIBDIR_RTLDDIR: substitute arguments in single quotes 2018-01-25 17:20:28 +01:00
ChangeLog math: Replace const attribute with pure in totalorder* functions 2019-09-05 11:21:54 -03:00
config.h.in S390: Add configure check to detect support for arch13. 2019-03-22 11:14:08 +01:00
config.make.in Make --bindir effective 2019-05-14 11:04:33 -03:00
configure elf/Makefile: Run IFUNC tests if binutils supports IFUNC 2019-02-27 13:21:55 -08:00
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extra-lib.mk Rename cppflags-iterator.mk to libof-iterator.mk, remove extra-modules.mk. 2017-05-09 07:06:29 -04:00
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INSTALL Update install and NEWS for 2.30 release. 2019-08-01 00:22:46 -04:00
libc-abis libc-abis: Define ABSOLUTE ABI [BZ #19818][BZ #23307] 2018-07-05 18:06:43 +01:00
libof-iterator.mk Rename cppflags-iterator.mk to libof-iterator.mk, remove extra-modules.mk. 2017-05-09 07:06:29 -04:00
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MAINTAINERS Add MAINTAINERS 2017-05-11 13:38:30 -04:00
Makeconfig test-container: Install with $(sorted-subdirs) [BZ #24794] 2019-07-29 10:31:06 -03:00
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version.h Open master for 2.31 development. 2019-08-01 00:41:53 -04:00

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