gcc/gcc
Daniel Berlin 326eda4b25 In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org>
In gcc/
2005-12-05  Daniel Berlin  <dberlin@dberlin.org>
	
	* print-tree.c (print_node): Ditto.
	* tree-dfa.c (add_referenced_var): Tag's don't have DECL_INITIAL.
	* tree-dump.c (dequeue_and_dump): Check for decl_common structure
	before accessing DECL_ARTIFICIAL. 
	Handle new tag tree codes.
	* tree-flow-inline.h (clear_call_clobbered): Update for tag
	changes.
	(unmodifiable_var_p): Ditto.
	* tree-flow.h (mem_tag_kind): Remove.
	(struct var_ann_d): Remove mem_tag_kind member.
	* tree-gimple.c (is_gimple_reg): Tags are not gimple registers.
	* tree-pretty-print.c (dump_generic_node): Handle memory tags.
	* tree-ssa-alias.c (init_alias_info): Update for memory tag changes.
	(group_aliases): Ditto.
	(setup_pointers_and_addressables): Ditto.
	(is_escape_site): Ditto.					  
	(may_alias_p): Ditto.
	(create_tag_raw): New function.
	(create_memory_tag): Use it.
	(dump_alias_info): Update for tags.
	(may_be_aliased): Ditto.
	(add_type_alias): Ditto.
	(new_type_alias): Ditto.
	(create_sft): Ditto.
	(create_structure_vars): Ditto.
	* tree-ssa-ccp.c (get_default_value): Ditto.
	* tree-ssa-operands.c (get_expr_operands): Ditto.
	(add_stmt_operand): Ditto.
	(add_call_clobber_ops): Remove duplicated condition.
	* tree-ssa.c (verify_flow_insensitive_alias_info): Update for
	tags.
	* tree-tailcall.c (suitable_for_tail_opt_p): Ditto.
	* tree-vect-transform.c (vect_create_data_ref_ptr): Ditto.
	* tree.c (init_ttree): Update structures for new tree codes.
	(tree_code_size): Update sizes for new tree codes.
	(make_node_stat): Don't try to set common things on minimal
	structures.
	(tree_node_structure): Update for tags.
	(is_global_var): Ditto.
	* tree.def: Add new tree codes.
	* tree.h (MTAG_P): New macro.
	(TREE_MEMORY_TAG_CHECK): Ditto.
	(SSA_VAR_P): Update for tags.
	(struct tree_memory_tag): New structure.
	(MTAG_GLOBAL): New macro.
	(union tree_node): Add memory tag member.
	* treestruct.def (TS_MEMORY_TAG): New.

In gcc/cp

2005-12-05  Daniel Berlin  <dberlin@dberlin.org>

	* ptree.c (cxx_print_decl): Update to check for decl_common
	structure.

From-SVN: r108102
2005-12-06 04:22:11 +00:00
..
ada utils.c (convert): Use fold_convert where appropriate. 2005-12-05 16:24:47 +00:00
config re PR target/24323 (_MM_TRANSPOSE4_PS could be improved) 2005-12-05 23:04:28 +00:00
cp In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
doc c-tree.texi (Function Bodies): Remove description of RETURN_INIT. 2005-12-05 22:21:29 +00:00
fortran re PR fortran/25106 ([4.0/4.1] statement label is zero) 2005-12-03 15:32:04 +00:00
ginclude
java parse.y (patch_new_array_init): Don't set length on array. 2005-12-06 02:30:11 +00:00
objc Fixup some spacing 2005-12-03 00:20:15 +00:00
objcp objcp-decl.c (objcp_lookup_name): Remove. 2005-11-22 11:05:51 -08:00
po * zh_CN.po: Update. 2005-12-03 01:02:39 +00:00
testsuite Index: gcc/ChangeLog 2005-12-05 21:38:27 +00:00
treelang treetree.c (tree_code_if_start, [...]): Use fold_convert where appropriate. 2005-12-05 10:01:06 +00:00
ABOUT-GCC-NLS
acinclude.m4
aclocal.m4
alias.c
alias.h
alloc-pool.c
alloc-pool.h
attribs.c
BASE-VER * BASE-VER: Change to 4.2.0. 2005-11-19 05:09:00 +00:00
basic-block.h
bb-reorder.c
bitmap.c
bitmap.h
bt-load.c
builtin-attrs.def
builtin-types.def
builtins.c re PR middle-end/25158 (FAIL: gcc.c-torture/execute/builtins/fprintf.c compilation) 2005-12-01 02:31:49 +00:00
builtins.def builtins.def (BUILT_IN_PUTC, [...]): New. 2005-12-01 22:46:14 +00:00
c-aux-info.c
c-common.c Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
c-common.def
c-common.h re PR c++/14024 (g++ isn't reporting aliasing warnings) 2005-11-24 10:48:15 +00:00
c-config-lang.in
c-convert.c c-common.c (c_sizeof_or_alignof_type): Use fold_convert instead of building a NOP_EXPR. 2005-12-03 18:58:43 +00:00
c-cppbuiltin.c c-cppbuiltin.c (c_cpp_builtins): Define __pic__ and __PIC__ when flag_pic is set. 2005-11-22 03:09:59 +00:00
c-decl.c re PR c++/21166 (g++ gives error on reference to packed structure elements) 2005-11-28 10:34:30 +00:00
c-dump.c
c-errors.c
c-format.c
c-format.h
c-gimplify.c
c-incpath.c
c-incpath.h
c-lang.c
c-lex.c c-lex.c (pragma_lex): Rename from c_lex. 2005-11-26 14:31:12 -08:00
c-objc-common.c
c-objc-common.h c-common.c, [...]: Revert 2005-11-18 lookup_name patch. 2005-11-21 13:27:29 -08:00
c-opts.c re PR c/7776 (const char* p = "foo"; if (p == "foo") ... is compiled without warning!) 2005-12-04 19:56:47 +00:00
c-parser.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
c-pch.c c-lex.c (pragma_lex): Rename from c_lex. 2005-11-26 14:31:12 -08:00
c-ppoutput.c
c-pragma.c c-lex.c (pragma_lex): Rename from c_lex. 2005-11-26 14:31:12 -08:00
c-pragma.h c-lex.c (pragma_lex): Rename from c_lex. 2005-11-26 14:31:12 -08:00
c-pretty-print.c c-common.c (c_sizeof_or_alignof_type): Use fold_convert instead of building a NOP_EXPR. 2005-12-03 18:58:43 +00:00
c-pretty-print.h
c-semantics.c
c-tree.h c-common.c, [...]: Revert 2005-11-18 lookup_name patch. 2005-11-21 13:27:29 -08:00
c-typeck.c c-typeck.c (null_pointer_constant_p): New function. 2005-12-04 23:04:59 +00:00
c.opt
caller-save.c caller-save.c: (this_insn_sets): Move into: (save_call_clobbered_regs). 2005-11-24 19:08:20 +00:00
calls.c
cfg.c
cfganal.c
cfgbuild.c
cfgcleanup.c cfgcleanup.c (try_crossjump_to_edge): Always split SRC2 if it has EH predecessor edges. 2005-11-27 12:42:33 +00:00
cfgexpand.c
cfghooks.c
cfghooks.h
cfglayout.c
cfglayout.h
cfgloop.c
cfgloop.h
cfgloopanal.c
cfgloopmanip.c
cfgrtl.c
cgraph.c
cgraph.h
cgraphunit.c
ChangeLog In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
ChangeLog-1997
ChangeLog-1998
ChangeLog-1999
ChangeLog-2000
ChangeLog-2001
ChangeLog-2002
ChangeLog-2003
ChangeLog-2004
ChangeLog-2005
ChangeLog.lib
ChangeLog.tree-ssa Fixup some spacing 2005-12-03 00:20:15 +00:00
collect2.c
collect2.h
combine.c re PR target/21017 (ppc 64bit target not using rlwinm) 2005-12-02 16:55:13 +10:30
common.opt re PR c/7776 (const char* p = "foo"; if (p == "foo") ... is compiled without warning!) 2005-12-04 19:56:47 +00:00
conditions.h
config.build
config.gcc config.gcc: Do not use fixproto on m68k-elf. 2005-11-29 03:20:19 +00:00
config.host
config.in
configure configure.ac: Require at least texinfo 4.4. 2005-11-24 15:08:21 +01:00
configure.ac configure.ac: Require at least texinfo 4.4. 2005-11-24 15:08:21 +01:00
conflict.c
convert.c convert.c (convert_to_integer): Fix compare for nonpositive constant to use tree_int_cst_sgn <= 0. 2005-12-02 09:46:17 +00:00
convert.h
COPYING
COPYING.LIB
coretypes.h
coverage.c
coverage.h
cppdefault.c
cppdefault.h
cppspec.c
crtstuff.c
cse.c cse.c (fold_rtx): Typo fix. 2005-11-22 08:29:23 +11:00
cselib.c
cselib.h
cstamp-h.in
DATESTAMP Daily bump. 2005-12-06 00:17:34 +00:00
dbxout.c
dbxout.h
ddg.c
ddg.h
debug.c
debug.h
defaults.h rs6000.h (ASM_OUTPUT_WEAKREF): Define. 2005-11-18 01:55:34 +00:00
DEV-PHASE
df.c
df.h
dfp.c dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
dfp.h dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
diagnostic.c
diagnostic.def
diagnostic.h
dojump.c
dominance.c
domwalk.c
domwalk.h
dummy-checksum.c
dummy-conditions.c
dwarf2.h * dwarf2.h (enum dwarf_type): Add DW_ATE_decimal_float. 2005-11-23 11:07:23 +11:00
dwarf2asm.c
dwarf2asm.h
dwarf2out.c PR rtl-optimization 25197 2005-12-03 14:56:37 +10:30
dwarf2out.h
dwarf.h
emit-rtl.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
emit-rtl.h
errors.c
errors.h
et-forest.c
et-forest.h
except.c
except.h
explow.c
expmed.c expmed.c (div_cost): Replace with... 2005-11-29 03:06:14 +00:00
expr.c expr.c (expand_expr_real_1): Fix error in last change. 2005-11-24 22:06:17 +00:00
expr.h
final.c
fix-header.c
fixproto
flags.h
flow.c
fold-const.c fold-const.c (fold_binary): Use fold_build2, not fold (build (...)). 2005-12-01 16:32:28 +00:00
fp-test.c
FSFChangeLog
FSFChangeLog.10
FSFChangeLog.11
function.c re PR middle-end/25176 ([4.0 only] FAIL: Array_3 -O3 execution - bytecode->native test) 2005-12-02 16:45:54 +10:30
function.h
gbl-ctors.h
gcc.c * gcc.c (execute): Improve readability. 2005-12-02 12:26:25 +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 (hash_scan_set): Look through REG_EQUAL or REG_EQUIV notes also when doing PRE... 2005-11-24 09:47:36 +00:00
gdbinit.in
gen-protos.c
genattr.c
genattrtab.c
genattrtab.h
genautomata.c
gencheck.c
genchecksum.c
gencodes.c
genconditions.c
genconfig.c
genconstants.c
genemit.c
genextract.c
genflags.c
gengenrtl.c
gengtype-lex.l
gengtype-yacc.y
gengtype.c
gengtype.h
genmddeps.c
genmodes.c dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
genmultilib
genopinit.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
genoutput.c
genpeep.c
genpreds.c
genrecog.c
gensupport.c gensupport.c (std_preds): Fixed extraneous false in last change. 2005-11-20 15:02:13 +00:00
gensupport.h
ggc-common.c
ggc-none.c
ggc-page.c
ggc-zone.c
ggc.h ggc.h (GGC_RESIZEVEC): New. 2005-12-02 12:37:15 +00:00
gimple-low.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
gimplify.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
glimits.h
global.c
graph.c
graph.h
gstab.h
gsyms.h
gsyslimits.h
gthr-aix.h
gthr-dce.h Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
gthr-gnat.c
gthr-gnat.h
gthr-lynx.h
gthr-nks.h
gthr-posix95.h Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
gthr-posix.c
gthr-posix.h Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
gthr-rtems.h
gthr-single.h
gthr-solaris.h Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
gthr-tpf.h Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
gthr-vxworks.h
gthr-win32.h
gthr.h
haifa-sched.c
hard-reg-set.h
hooks.c
hooks.h
host-default.c
hosthooks-def.h
hosthooks.h
hwint.h
ifcvt.c
input.h
insn-addr.h
insn-notes.def
integrate.c
integrate.h
intl.c
intl.h
ipa-cp.c
ipa-inline.c
ipa-prop.c
ipa-prop.h
ipa-pure-const.c
ipa-reference.c
ipa-reference.h
ipa-type-escape.c
ipa-type-escape.h
ipa-utils.c
ipa-utils.h
ipa.c
jump.c
lambda-code.c tree-vrp.c (build_assert_expr_for, [...]): Use buildN instead of build. 2005-12-02 14:40:40 +00:00
lambda-mat.c
lambda-trans.c
lambda.h
langhooks-def.h c-common.c, [...]: Revert 2005-11-18 lookup_name patch. 2005-11-21 13:27:29 -08:00
langhooks.c
langhooks.h c-common.c, [...]: Revert 2005-11-18 lookup_name patch. 2005-11-21 13:27:29 -08:00
LANGUAGES
lcm.c
libada-mk.in
libfuncs.h
libgcc2.c libgcc2.c (__popcountSI2): Don't use wide type for iterator and result. 2005-12-05 08:34:25 +00:00
libgcc2.h fp-bit.c (clzusi): New function. 2005-11-22 00:38:30 +00:00
libgcc-std.ver fp-bit.c (clzusi): New function. 2005-11-22 00:38:30 +00:00
libgcov.c
limitx.h
limity.h
lists.c
local-alloc.c
longlong.h
loop-doloop.c loop-doloop.c (add_test): Only add jump notes if we did emit a jump. 2005-11-30 11:12:36 +00:00
loop-init.c
loop-invariant.c
loop-iv.c
loop-unroll.c re PR rtl-optimization/24497 (internal compiler error: in apply_opt_in_copies, at loop-unroll.c:2122) 2005-11-18 10:31:45 +00:00
loop-unswitch.c
loop.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
machmode.def dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
machmode.h dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
main.c
Makefile.in dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
mips-tdump.c
mips-tfile.c
mkconfig.sh
mklibgcc.in mklibgcc.in: Parameterise the script to build soft float functions by iterating over each... 2005-12-01 14:39:45 +11:00
mkmap-flat.awk
mkmap-symver.awk
mode-classes.def dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
mode-switching.c
modulo-sched.c
ONEWS
opt-functions.awk
opt-gather.awk
optabs.c * optabs.c (expand_vec_cond_expr): Use EXPAND_NORMAL. 2005-12-01 14:49:31 -08:00
optabs.h expr.c (expand_expr_real): Use usmul_optab for widening signed * unsigned multiplies. 2005-11-20 18:49:18 +00:00
optc-gen.awk
opth-gen.awk
opts.c
opts.h
output.h
params.c
params.def
params.h
passes.c passes.c (init_optimization_passes): Document sequencing of passes. 2005-11-23 13:05:38 -05:00
pointer-set.c
pointer-set.h
postreload-gcse.c
postreload.c * postreload.c (reload_cse_move2add): Don't try to work with BImode. 2005-11-18 08:14:39 -05:00
predict.c
predict.def
predict.h
prefix.c
prefix.h
pretty-print.c
pretty-print.h
print-rtl.c
print-tree.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
profile.c
protoize.c
read-rtl.c
README.Portability
real.c Missed in last check-in. 2005-12-02 14:02:19 +11:00
real.h dfp.h, dfp.c: New files. 2005-12-02 13:30:42 +11:00
recog.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
recog.h
reg-notes.def
reg-stack.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
regclass.c re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
regmove.c
regrename.c re PR rtl-optimization/23392 (foward-1.m fails with -funroll-loops -O3 -fgnu-runtime) 2005-11-16 10:52:15 +10:30
regs.h
reload1.c re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
reload.c re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
reload.h re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
reorg.c
resource.c
resource.h
rtl-error.c
rtl-profile.c
rtl.c
rtl.def
rtl.h
rtlanal.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
rtlhooks-def.h
rtlhooks.c
sbitmap.c
sbitmap.h
scan-decls.c
scan-types.sh
scan.c
scan.h
sched-deps.c
sched-ebb.c
sched-int.h
sched-rgn.c
sched-vis.c
sdbout.c
sdbout.h
SERVICE
simplify-rtx.c simplify-rtx.c (simplify_plus_minus): Do simplify constants. 2005-12-02 10:18:13 +10:30
sort-protos
sreal.c
sreal.h
stab.def
statistics.h
stmt.c
stor-layout.c re PR c++/21166 (g++ gives error on reference to packed structure elements) 2005-11-28 10:34:30 +00:00
stringpool.c
stub-objc.c
sys-protos.h
sys-types.h
system.h
target-def.h re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
target.h re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
targhooks.c cris.md ("reload_out<mode>"): Mark operand 2 as earlyclobber. 2005-11-25 20:15:27 +00:00
targhooks.h re PR target/21623 (ICE in reload_cse_simplify_operands, at postreload.c:391) 2005-11-24 18:55:53 +00:00
timevar.c
timevar.def
timevar.h
tlink.c
toplev.c
toplev.h
tracer.c
tree-browser.c
tree-browser.def
tree-cfg.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-cfgcleanup.c
tree-chrec.c
tree-chrec.h tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-complex.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-data-ref.c
tree-data-ref.h
tree-dfa.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-dump.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-dump.h
tree-eh.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-flow-inline.h In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-flow.h In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-gimple.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-gimple.h re PR tree-optimization/24665 (internal compiler error: get_indirect_ref_operands) 2005-11-19 21:37:08 -08:00
tree-if-conv.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-inline.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-inline.h
tree-into-ssa.c * tree-into-ssa.c (rewrite_into_ssa): Fix comment typo. 2005-11-29 23:06:54 -08:00
tree-iterator.c
tree-iterator.h
tree-loop-linear.c
tree-mudflap.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-mudflap.h
tree-nested.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-nomudflap.c
tree-nrv.c
tree-object-size.c
tree-optimize.c
tree-outof-ssa.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-pass.h
tree-phinodes.c
tree-pretty-print.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-profile.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-scalar-evolution.c tree-scalar-evolution.c (expression_expensive_p): New function. 2005-11-18 10:27:50 +00:00
tree-scalar-evolution.h
tree-sra.c tree-vrp.c (build_assert_expr_for, [...]): Use buildN instead of build. 2005-12-02 14:40:40 +00:00
tree-ssa-address.c
tree-ssa-alias.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-ssa-ccp.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-ssa-copy.c
tree-ssa-copyrename.c
tree-ssa-dce.c
tree-ssa-dom.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-ssa-dse.c
tree-ssa-forwprop.c tree-vrp.c (build_assert_expr_for, [...]): Use buildN instead of build. 2005-12-02 14:40:40 +00:00
tree-ssa-live.c
tree-ssa-live.h
tree-ssa-loop-ch.c
tree-ssa-loop-im.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-ssa-loop-ivcanon.c
tree-ssa-loop-ivopts.c
tree-ssa-loop-manip.c
tree-ssa-loop-niter.c
tree-ssa-loop-unswitch.c
tree-ssa-loop.c
tree-ssa-math-opts.c
tree-ssa-operands.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-ssa-operands.h
tree-ssa-opfinalize.h
tree-ssa-phiopt.c
tree-ssa-pre.c tree-ssa-loop-im.c (schedule_sm): Use buildN instead of build. 2005-12-02 17:09:40 +00:00
tree-ssa-propagate.c
tree-ssa-propagate.h
tree-ssa-reassoc.c
tree-ssa-sink.c
tree-ssa-structalias.c re PR middle-end/22561 (ACATS ca11c01 wrong code) 2005-11-22 22:35:55 +00:00
tree-ssa-structalias.h
tree-ssa-threadupdate.c
tree-ssa-uncprop.c tree-ssa-uncprop.c (associate_equivalences_with_edges): Properly handle SSA_NAME_OCCURS_IN_ABNORMAL_PHI. 2005-11-30 01:53:22 -07:00
tree-ssa.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-ssanames.c
tree-stdarg.c
tree-stdarg.h
tree-tailcall.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-vect-analyze.c
tree-vect-generic.c optabs.c (expand_abs_nojump): Use SCALAR_FLOAT_MODE_P instead of explicitly testing GET_MODE_CLASS (x) ==... 2005-11-22 07:53:27 +11:00
tree-vect-transform.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree-vectorizer.c
tree-vectorizer.h
tree-vn.c
tree-vrp.c tree-vrp.c (build_assert_expr_for, [...]): Use buildN instead of build. 2005-12-02 14:40:40 +00:00
tree.c In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree.def In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tree.h In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
treestruct.def In gcc/ 2005-12-05 Daniel Berlin <dberlin@dberlin.org> 2005-12-06 04:22:11 +00:00
tsystem.h
typeclass.h
unwind-c.c unwind-arm.c (abort): Add prototype here. 2005-11-16 17:08:05 +00:00
unwind-compat.c
unwind-compat.h
unwind-dw2-fde-compat.c
unwind-dw2-fde-darwin.c
unwind-dw2-fde-glibc.c
unwind-dw2-fde.c
unwind-dw2-fde.h
unwind-dw2.c dwarf2out.c (dw_cfi_oprnd_struct): Reduce dw_cfi_reg_num to int. 2005-11-17 17:19:10 -08:00
unwind-dw2.h
unwind-generic.h
unwind-pe.h
unwind-sjlj.c unwind-ia64.c (uw_advance_context): New. 2005-11-16 22:10:39 +00:00
unwind.inc unwind-ia64.c (uw_advance_context): New. 2005-11-16 22:10:39 +00:00
value-prof.c
value-prof.h
var-tracking.c dwarf2out.c (dw_cfi_oprnd_struct): Reduce dw_cfi_reg_num to int. 2005-11-17 17:19:10 -08:00
varasm.c Index: gcc/ChangeLog 2005-12-05 20:38:37 +00:00
varray.c
varray.h
vec.c
vec.h * vec.h (VEC_block_remove): New. 2005-12-01 12:20:20 +00:00
version.c
version.h
vmsdbg.h
vmsdbgout.c
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 C90 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.