gcc/gcc
Mark Mitchell f583e45212 re PR c++/13932 (duplicate warning message for conversion)
PR c++/13932
	* call.c (convert_like_real): Use "converting" rather than
	"argument" as the descriptive keyword to
	dubious_conversion_warnings.
	* typeck.c (convert_for_assignment): Do not call
	dubious_conversion_warnings.

	PR c++/13932
	* g++.dg/warn/conv2.C: New test.

From-SVN: r77297
2004-02-05 05:22:21 +00:00
..
ada [multiple changes] 2004-02-04 12:06:19 +01:00
config * config/s390/s390.c (s390_trampoline_template): Remove gen_rtx(). 2004-02-04 23:46:29 +00:00
cp re PR c++/13932 (duplicate warning message for conversion) 2004-02-05 05:22:21 +00:00
doc tm.texi: Replace SETUP_INCOMING_VARARGS with TARGET_SETUP_INCOMING_VARARGS. 2004-02-04 06:32:51 +00:00
f combine.c (simplify_set): Use gen_rtx_fmt_e instead of gen_rtx. 2004-02-03 05:15:46 +00:00
fixinc fixinc.c (test_test): Initialize res. 2004-01-27 19:10:10 +00:00
ginclude
java alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
objc re PR c/11658 (Wrong error message) 2004-02-03 11:22:41 +00:00
po * de.po: Update. 2004-02-01 15:15:29 +00:00
testsuite re PR c++/13932 (duplicate warning message for conversion) 2004-02-05 05:22:21 +00:00
treelang Makefile.in (abs_docdir, abs_srcdir): Define. 2004-01-31 00:50:03 +00:00
.cvsignore * .cvsignore: Add autom4te.cache. 2004-01-05 00:39:35 +00:00
ABOUT-GCC-NLS
aclocal.m4 configure.ac: Replace gcc_AC_CHECK_TYPE with AC_CHECK_TYPE. 2004-01-03 18:59:32 +00:00
alias.c alias.c (find_base_term, get_addr): Do not dereference NULL pointer when all VALUE's locations has been invalidated. 2004-02-03 23:53:48 +00:00
alloc-pool.c alloc-pool.c: Fix comment typos. 2004-01-31 17:47:43 +00:00
alloc-pool.h alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
attribs.c
basic-block.h Makefile.in (cfghooks.o): Add TIMEVAR_H and toplev.h dependency. 2004-01-29 07:47:56 +00:00
bb-reorder.c
bitmap.c
bitmap.h
bt-load.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
builtin-attrs.def
builtin-types.def alloc-pool.c: Fix comment typos. 2004-01-31 17:47:43 +00:00
builtins.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
builtins.def builtins.def (BUILT_IN_SIGNBIT, [...]): New GCC builtins. 2004-02-01 14:59:15 +00:00
c-aux-info.c
c-common.c re PR c/11658 (Wrong error message) 2004-02-03 11:22:41 +00:00
c-common.def
c-common.h c-common.h: Fix comment typos. 2004-01-25 03:52:42 +00:00
c-config-lang.in
c-convert.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
c-cppbuiltin.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
c-decl.c system.h (CHAR_BITFIELD): Delete. 2004-01-27 02:33:22 +00:00
c-dump.c
c-errors.c
c-format.c
c-incpath.c
c-incpath.h
c-lang.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
c-lex.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
c-objc-common.c re PR c/11658 (Wrong error message) 2004-02-03 11:22:41 +00:00
c-opts.c [multiple changes] 2004-02-02 20:20:58 +00:00
c-parse.in re PR c/11658 (Wrong error message) 2004-02-03 11:22:41 +00:00
c-pch.c
c-ppoutput.c
c-pragma.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
c-pragma.h alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
c-pretty-print.c alloc-pool.c: Fix comment typos. 2004-01-31 17:47:43 +00:00
c-pretty-print.h
c-semantics.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
c-tree.h alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
c-typeck.c re PR c/11658 (Wrong error message) 2004-02-03 11:22:41 +00:00
c.opt [multiple changes] 2004-02-02 20:20:58 +00:00
caller-save.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
calls.c calls.c (initialize_argument_information): Add CALL_FROM_THUNK_P parameter. 2004-02-04 12:22:42 +00:00
cfg.c Makefile.in (cfghooks.o): Add TIMEVAR_H and toplev.h dependency. 2004-01-29 07:47:56 +00:00
cfganal.c
cfgbuild.c
cfgcleanup.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
cfghooks.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
cfghooks.h alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
cfglayout.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
cfglayout.h backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
cfgloop.c Makefile.in (cfghooks.o): Add TIMEVAR_H and toplev.h dependency. 2004-01-29 07:47:56 +00:00
cfgloop.h backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
cfgloopanal.c backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
cfgloopmanip.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
cfgrtl.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
cgraph.c re PR c++/12850 (memory consumption for heavy template instantiations tripled since 3.3) 2004-01-29 00:34:09 +00:00
cgraph.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
cgraphunit.c * cgraphunit.c (cgraph_postorder): Fix typo in comment. 2004-02-04 17:38:22 +00:00
ChangeLog reload.c (find_equiv_reg): When checking for register overlap, don't index hard_regno_nregs with a pseudo-reg. 2004-02-04 23:58:11 +00:00
ChangeLog.0
ChangeLog.1
ChangeLog.2
ChangeLog.3
ChangeLog.4
ChangeLog.5
ChangeLog.6
ChangeLog.7
ChangeLog.8 Rotate ChangeLog 2004-01-01 00:32:08 +00:00
ChangeLog.9
ChangeLog.10 Fix messed up accidental commit. 2004-01-03 19:58:40 +00:00
ChangeLog.lib
collect2.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
collect2.h
combine.c combine.c (simplify_set): Use gen_rtx_fmt_e instead of gen_rtx. 2004-02-03 05:15:46 +00:00
common.opt re PR middle-end/13779 ([3.4 only] powerpc64: incorrect initialization of 'long long' with constant) 2004-01-27 12:49:31 +00:00
conditions.h
config.build
config.gcc config.gcc: Remove obsolete ports and configurations. 2004-02-04 05:13:43 +00:00
config.host
config.in Makefile.in: Rename configure.in to configure.ac 2004-01-09 01:18:35 +00:00
configure re PR bootstrap/9249 (bootstrap fails with --enable-__cxa-atexit on Solaris) 2004-01-30 20:18:15 -08:00
configure.ac re PR bootstrap/9249 (bootstrap fails with --enable-__cxa-atexit on Solaris) 2004-01-30 20:18:15 -08:00
conflict.c
convert.c
convert.h
COPYING
COPYING.LIB
coretypes.h
coverage.c coverage.c (get_coverage_counts): Give a different message if flag_guess_branch_prob is set. 2004-01-27 19:54:42 +00:00
coverage.h
cppcharset.c [multiple changes] 2004-02-02 20:20:58 +00:00
cppdefault.c
cppdefault.h
cpperror.c cpperror.c, [...]: Update copyright. 2004-01-22 00:15:25 +00:00
cppexp.c
cppfiles.c [multiple changes] 2004-02-02 20:20:58 +00:00
cpphash.c
cpphash.h [multiple changes] 2004-02-02 20:20:58 +00:00
cppinit.c [multiple changes] 2004-02-02 20:20:58 +00:00
cpplex.c
cpplib.c [multiple changes] 2004-02-02 20:20:58 +00:00
cpplib.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
cppmacro.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
cpppch.c [multiple changes] 2004-01-17 00:37:47 +00:00
cppspec.c
cpptrad.c cpperror.c, [...]: Update copyright. 2004-01-22 00:15:25 +00:00
cppucnid.h
cppucnid.pl
cppucnid.tab
crtstuff.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
cse.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
cselib.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
cselib.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
cstamp-h.in
dbxout.c Makefile.in (dwarf2out.o): Depend on input.h 2004-01-27 12:36:02 -08:00
dbxout.h
debug.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
debug.h alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
defaults.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
df.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
df.h alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
diagnostic.c
diagnostic.def
diagnostic.h
dojump.c
doloop.c doloop.c, [...]: Use const0_rtx instead of GEN_INT (0). 2004-02-03 05:39:57 +00:00
dominance.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
dummy-conditions.c
dwarf2.h dwarf2.h, [...]: Add multiple-include guard. 2004-01-08 07:50:46 +00:00
dwarf2asm.c
dwarf2asm.h
dwarf2out.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
dwarf2out.h
dwarf.h
emit-rtl.c emit-rtl.c (gen_rtx): Remove. 2004-02-04 06:12:54 +00:00
errors.c
errors.h
et-forest.c c-common.h: Fix comment typos. 2004-01-25 03:52:42 +00:00
et-forest.h backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
except.c re PR target/7297 ([irix6 o32] sjlj exceptions fail) 2004-01-27 22:13:29 +00:00
except.h
explow.c
expmed.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
expr.c re PR target/9348 ([HP-UX] error in int to unsigned long multiplication) 2004-02-03 21:31:00 +00:00
expr.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
final.c final.c (final_scan_insn): Make non-static again. 2004-01-18 22:37:29 +00:00
fix-header.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
fixproto
flags.h re PR middle-end/13779 ([3.4 only] powerpc64: incorrect initialization of 'long long' with constant) 2004-01-27 12:49:31 +00:00
flow.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
fold-const.c tree.c (commutative_tree_code, [...]): New functions. 2004-02-03 03:03:43 +00:00
fp-test.c
FSFChangeLog
FSFChangeLog.10
FSFChangeLog.11
function.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
function.h calls.c (initialize_argument_information): Add CALL_FROM_THUNK_P parameter. 2004-02-04 12:22:42 +00:00
gbl-ctors.h
gcc.c gcc.c (process_command): Don't internationalize the Copyright message. 2004-01-24 10:09:48 +00:00
gcc.h
gccbug.in
gccspec.c
gcov-dump.c
gcov-io.c
gcov-io.h
gcov-iov.c
gcov.c
gcse.c gcse.c (bypass_block): Fix a typo in the previous check-in to the file. 2004-01-30 18:22:16 +00:00
gdbinit.in
gen-protos.c
genattr.c
genattrtab.c emit-rtl.c (gen_rtx): Remove. 2004-02-04 06:12:54 +00:00
genattrtab.h
genautomata.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
gencheck.c
gencodes.c
genconditions.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
genconfig.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
genconstants.c
genemit.c genemit.c (gen_exp): Generate gen_rtx_fmt_e* instead of gen_rtx. 2004-02-02 22:05:41 +00:00
genextract.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
genflags.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
gengenrtl.c
gengtype-lex.l system.h (CHAR_BITFIELD): Delete. 2004-01-27 02:33:22 +00:00
gengtype-yacc.y
gengtype.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
gengtype.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
genmodes.c
genmultilib
genopinit.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
genoutput.c re PR c/11234 (-pedantic accepts function pointer <-> void*) 2004-01-09 20:03:58 +00:00
genpeep.c
genpreds.c
genrecog.c genrecog.c (decision_type): Add DT_const_int. 2004-01-31 23:08:52 +00:00
gensupport.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
gensupport.h
ggc-common.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
ggc-none.c
ggc-page.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
ggc-zone.c ggc-zone.c (ggc_free): New function. 2004-01-31 02:18:25 +00:00
ggc.h alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
glimits.h
global.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
gmon.c
graph.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
graph.h
gstab.h
gsyms.h
gsyslimits.h
gthr-aix.h
gthr-dce.h
gthr-gnat.c
gthr-gnat.h
gthr-posix.c
gthr-posix.h
gthr-rtems.h
gthr-single.h
gthr-solaris.h
gthr-vxworks.h
gthr-win32.h
gthr.h
haifa-sched.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
hard-reg-set.h
hashtable.c
hashtable.h
hooks.c re PR target/1532 (-O3 generates (obviously) redundant tests and jumps) 2004-01-23 21:05:21 +00:00
hooks.h re PR target/1532 (-O3 generates (obviously) redundant tests and jumps) 2004-01-23 21:05:21 +00:00
host-default.c
hosthooks-def.h
hosthooks.h
hwint.h
ifcvt.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
input.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
insn-addr.h
integrate.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
integrate.h
intl.c
intl.h
jump.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
langhooks-def.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
langhooks.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
langhooks.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
LANGUAGES
lcm.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
libfuncs.h
libgcc2.c
libgcc2.h
libgcc-darwin.ver
libgcc-std.ver
libgcov.c
limitx.h
limity.h
line-map.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
line-map.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
lists.c
local-alloc.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
longlong.h backport: re PR target/12476 (ARM/THUMB thunk calls broken) 2004-02-03 14:45:44 +00:00
loop-init.c backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
loop-unroll.c backport: et-forest.h (et_forest_create, [...]): Declarations removed. 2003-12-30 10:40:56 +00:00
loop-unswitch.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
loop.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
loop.h
machmode.def
machmode.h
main.c
Makefile.in Makefile.in: Move target, host overrides after per-language fragments. 2004-02-04 20:39:15 +00:00
mips-tdump.c
mips-tfile.c gcc.c (process_command): Don't internationalize the Copyright message. 2004-01-24 10:09:48 +00:00
mkconfig.sh
mkdeps.c
mkdeps.h
mkheaders.in
mkinstalldirs
mklibgcc.in
mkmap-flat.awk
mkmap-symver.awk
mode-classes.def
move-if-change
ONEWS
optabs.c doloop.c, [...]: Use const0_rtx instead of GEN_INT (0). 2004-02-03 05:39:57 +00:00
optabs.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
opts.c re PR middle-end/13779 ([3.4 only] powerpc64: incorrect initialization of 'long long' with constant) 2004-01-27 12:49:31 +00:00
opts.h
opts.sh
output.h final.c (final_scan_insn): Make non-static again. 2004-01-18 22:37:29 +00:00
params.c
params.def cpperror.c, [...]: Update copyright. 2004-01-22 00:15:25 +00:00
params.h
postreload.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
predict.c coverage.c (get_coverage_counts): Give a different message if flag_guess_branch_prob is set. 2004-01-27 19:54:42 +00:00
predict.def
predict.h
prefix.c
prefix.h
pretty-print.c
pretty-print.h
print-rtl.c print-rtl.c (print_rtx): For hard register... 2003-12-31 18:02:44 -05:00
print-tree.c tree.h: Update documentation on nothrow_flag. 2004-01-05 10:16:35 -05:00
profile.c
protoize.c
ra-build.c
ra-colorize.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
ra-debug.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
ra-rewrite.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
ra.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
ra.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
read-rtl.c
README-fixinc
README.Portability
real.c real.c (real_floor, real_ceil): Tweak to allow input and output arguments to overlap. 2004-01-23 16:16:33 +00:00
real.h real.c (real_floor, real_ceil): Tweak to allow input and output arguments to overlap. 2004-01-23 16:16:33 +00:00
recog.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
recog.h re PR c/11234 (-pedantic accepts function pointer <-> void*) 2004-01-09 20:03:58 +00:00
reg-stack.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
regclass.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
regmove.c doloop.c, [...]: Use const0_rtx instead of GEN_INT (0). 2004-02-03 05:39:57 +00:00
regrename.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
regs.h alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
reload1.c combine.c (simplify_set): Use gen_rtx_fmt_e instead of gen_rtx. 2004-02-03 05:15:46 +00:00
reload.c reload.c (find_equiv_reg): When checking for register overlap, don't index hard_regno_nregs with a pseudo-reg. 2004-02-04 23:58:11 +00:00
reload.h
reorg.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
resource.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
resource.h
rtl-error.c
rtl.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
rtl.def cpperror.c, [...]: Update copyright. 2004-01-22 00:15:25 +00:00
rtl.h emit-rtl.c (gen_rtx): Remove. 2004-02-04 06:12:54 +00:00
rtlanal.c rtlanal.c (refers_to_regno_p): Test regno, not inner_regno, against FIRST_PSEUDO_REGISTER. 2004-02-02 13:20:55 -05:00
sbitmap.c sbitmap.c (sbitmap_union_of_diff_cg, [...]): Accumulate "changed" properly. 2003-12-28 16:53:27 +00:00
sbitmap.h
scan-decls.c
scan-types.sh
scan.c
scan.h
sched-deps.c doloop.c, [...]: Use const0_rtx instead of GEN_INT (0). 2004-02-03 05:39:57 +00:00
sched-ebb.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
sched-int.h
sched-rgn.c alloc-pool.h, [...]: Update copyright. 2004-02-04 19:15:30 +00:00
sched-vis.c
sdbout.c Makefile.in (dwarf2out.o): Depend on input.h 2004-01-27 12:36:02 -08:00
sdbout.h
SERVICE
sibcall.c
simplify-rtx.c simplify-rtx.c (simplify_relational_operation): Don't simplify address == constant into address + -constant == 0. 2004-01-24 12:01:29 +01:00
sort-protos
sreal.c
sreal.h
stab.def
stack.h
stmt.c alias.c (record_set): Use hard_regno_nregs. 2004-02-02 00:17:18 +00:00
stor-layout.c stor-layout.c (layout_decl): Turn bitfields into ordinary fields... 2003-12-30 19:49:59 +00:00
stringpool.c
stub-objc.c
sys-protos.h
sys-types.h
system.h system.h (GIV_SORT_CRITERION): Poison. 2004-02-03 22:14:48 +00:00
target-def.h target-def.h (TARGET_STRICT_ARGUMENT_NAMING): Define as hook_bool_CUMULATIVE_ARGS_false. 2004-01-31 22:12:55 +00:00
target.h re PR target/1532 (-O3 generates (obviously) redundant tests and jumps) 2004-01-23 21:05:21 +00:00
targhooks.c target-def.h (TARGET_STRICT_ARGUMENT_NAMING): Define as hook_bool_CUMULATIVE_ARGS_false. 2004-01-31 22:12:55 +00:00
targhooks.h target-def.h (TARGET_STRICT_ARGUMENT_NAMING): Define as hook_bool_CUMULATIVE_ARGS_false. 2004-01-31 22:12:55 +00:00
timevar.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
timevar.def alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
timevar.h
tlink.c
toplev.c toplev.c: Include alloc-pool.h. 2004-01-30 09:43:24 -08:00
toplev.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
tracer.c
tree-dump.c
tree-dump.h
tree-inline.c alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
tree-inline.h
tree-optimize.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
tree.c re PR c++/13975 (ICE on misplaced visibility specifier.) 2004-02-03 16:53:27 +00:00
tree.def Index: ChangeLog 2004-01-16 07:20:38 +00:00
tree.h calls.c (initialize_argument_information): Add CALL_FROM_THUNK_P parameter. 2004-02-04 12:22:42 +00:00
tsystem.h
typeclass.h
unroll.c
unwind-c.c
unwind-dw2-fde-darwin.c
unwind-dw2-fde-glibc.c
unwind-dw2-fde.c
unwind-dw2-fde.h cpperror.c, [...]: Update copyright. 2004-01-22 00:15:25 +00:00
unwind-dw2.c
unwind-pe.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
unwind-sjlj.c
unwind.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
unwind.inc
value-prof.c
value-prof.h
varasm.c * varasm.c (const_desc_rtx_sym_eq): Compare symbol strings. 2004-02-03 13:24:39 -08:00
varray.c c-common.h: Fix comment typos. 2004-01-25 03:52:42 +00:00
varray.h alias.c, [...]: Update copyright. 2004-01-21 20:40:04 +00:00
version.c Daily bump. 2004-02-05 00:16:15 +00:00
version.h
vmsdbg.h
vmsdbgout.c alloc-pool.c, c-lex.c, c-pragma.h, c-semantics.c, cfghooks.c, 2004-01-31 02:07:12 +00:00
web.c
xcoff.h
xcoffout.c
xcoffout.h

Copyright (C) 2000, 2003 Free Software Foundation, Inc.

This file is intended to contain a few notes about writing C code
within GCC so that it compiles without error on the full range of
compilers GCC needs to be able to compile on.

The problem is that many ISO-standard constructs are not accepted by
either old or buggy compilers, and we keep getting bitten by them.
This knowledge until know has been sparsely spread around, so I
thought I'd collect it in one useful place.  Please add and correct
any problems as you come across them.

I'm going to start from a base of the ISO C89 standard, since that is
probably what most people code to naturally.  Obviously using
constructs introduced after that is not a good idea.

For the complete coding style conventions used in GCC, please read
http://gcc.gnu.org/codingconventions.html


String literals
---------------

Irix6 "cc -n32" and OSF4 "cc" have problems with constant string
initializers with parens around it, e.g.

const char string[] = ("A string");

This is unfortunate since this is what the GNU gettext macro N_
produces.  You need to find a different way to code it.

Some compilers like MSVC++ have fairly low limits on the maximum
length of a string literal; 509 is the lowest we've come across.  You
may need to break up a long printf statement into many smaller ones.


Empty macro arguments
---------------------

ISO C (6.8.3 in the 1990 standard) specifies the following:

If (before argument substitution) any argument consists of no
preprocessing tokens, the behavior is undefined.

This was relaxed by ISO C99, but some older compilers emit an error,
so code like

#define foo(x, y) x y
foo (bar, )

needs to be coded in some other way.


free and realloc
----------------

Some implementations crash upon attempts to free or realloc the null
pointer.  Thus if mem might be null, you need to write

  if (mem)
    free (mem);


Trigraphs
---------

You weren't going to use them anyway, but some otherwise ISO C
compliant compilers do not accept trigraphs.


Suffixes on Integer Constants
-----------------------------

You should never use a 'l' suffix on integer constants ('L' is fine),
since it can easily be confused with the number '1'.


			Common Coding Pitfalls
			======================

errno
-----

errno might be declared as a macro.


Implicit int
------------

In C, the 'int' keyword can often be omitted from type declarations.
For instance, you can write

  unsigned variable;

as shorthand for

  unsigned int variable;

There are several places where this can cause trouble.  First, suppose
'variable' is a long; then you might think

  (unsigned) variable

would convert it to unsigned long.  It does not.  It converts to
unsigned int.  This mostly causes problems on 64-bit platforms, where
long and int are not the same size.

Second, if you write a function definition with no return type at
all:

  operate (int a, int b)
  {
    ...
  }

that function is expected to return int, *not* void.  GCC will warn
about this.

Implicit function declarations always have return type int.  So if you
correct the above definition to

  void
  operate (int a, int b)
  ...

but operate() is called above its definition, you will get an error
about a "type mismatch with previous implicit declaration".  The cure
is to prototype all functions at the top of the file, or in an
appropriate header.

Char vs unsigned char vs int
----------------------------

In C, unqualified 'char' may be either signed or unsigned; it is the
implementation's choice.  When you are processing 7-bit ASCII, it does
not matter.  But when your program must handle arbitrary binary data,
or fully 8-bit character sets, you have a problem.  The most obvious
issue is if you have a look-up table indexed by characters.

For instance, the character '\341' in ISO Latin 1 is SMALL LETTER A
WITH ACUTE ACCENT.  In the proper locale, isalpha('\341') will be
true.  But if you read '\341' from a file and store it in a plain
char, isalpha(c) may look up character 225, or it may look up
character -31.  And the ctype table has no entry at offset -31, so
your program will crash.  (If you're lucky.)

It is wise to use unsigned char everywhere you possibly can.  This
avoids all these problems.  Unfortunately, the routines in <string.h>
take plain char arguments, so you have to remember to cast them back
and forth - or avoid the use of strxxx() functions, which is probably
a good idea anyway.

Another common mistake is to use either char or unsigned char to
receive the result of getc() or related stdio functions.  They may
return EOF, which is outside the range of values representable by
char.  If you use char, some legal character value may be confused
with EOF, such as '\377' (SMALL LETTER Y WITH UMLAUT, in Latin-1).
The correct choice is int.

A more subtle version of the same mistake might look like this:

  unsigned char pushback[NPUSHBACK];
  int pbidx;
  #define unget(c) (assert(pbidx < NPUSHBACK), pushback[pbidx++] = (c))
  #define get(c) (pbidx ? pushback[--pbidx] : getchar())
  ...
  unget(EOF);

which will mysteriously turn a pushed-back EOF into a SMALL LETTER Y
WITH UMLAUT.


Other common pitfalls
---------------------

o Expecting 'plain' char to be either sign or unsigned extending.

o Shifting an item by a negative amount or by greater than or equal to
  the number of bits in a type (expecting shifts by 32 to be sensible
  has caused quite a number of bugs at least in the early days).

o Expecting ints shifted right to be sign extended.

o Modifying the same value twice within one sequence point.

o Host vs. target floating point representation, including emitting NaNs
  and Infinities in a form that the assembler handles.

o qsort being an unstable sort function (unstable in the sense that
  multiple items that sort the same may be sorted in different orders
  by different qsort functions).

o Passing incorrect types to fprintf and friends.

o Adding a function declaration for a module declared in another file to
  a .c file instead of to a .h file.