gcc/gcc
Richard Biener 1d72079ba3 tree-optimization/95327 - fix another vectorizable_shift const SLP op
This fixes another case where we fail to set the type on a SLP
constant operand in vectorizable_shift.

2020-05-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/95327
	* tree-vect-stmts.c (vectorizable_shift): Compute op1_vectype
	when we are not using a scalar shift.
2020-05-26 15:58:32 +02:00
..
ada revamp dump and aux output names 2020-05-26 04:30:15 -03:00
analyzer analyzer: Add exit, and _exit replacement, to sm-signal. 2020-05-22 21:02:34 +02:00
brig
c c/95141 - fix bogus integer overflow warning 2020-05-20 09:39:49 +02:00
c-family Suggest including <stdint.h> or <cstdint> for [u]int[8|16|32|64]_t 2020-05-22 23:22:30 +02:00
common Add outline-atomics to target attribute. 2020-05-21 12:46:23 +02:00
config i386: Implement V2SI and V4HI shuffles 2020-05-26 15:17:51 +02:00
cp openmp: Ensure copy ctor for composite distribute parallel for class iterators is instantiated [PR95197] 2020-05-26 09:35:21 +02:00
d d: Fix ICE in verify_gimple_stmt, at tree-cfg.c:4959 2020-05-06 23:56:24 +02:00
doc revamp dump and aux output names 2020-05-26 04:30:15 -03:00
fortran revamp dump and aux output names 2020-05-26 04:30:15 -03:00
ginclude
go libgo: update x/sys/cpu after gccgo support added 2020-05-25 13:43:44 -07:00
jit
lto Avoid streaming stray references. 2020-05-22 16:37:06 +02:00
objc
objcp
po Update gcc sv.po. 2020-05-18 20:50:35 +00:00
testsuite i386: Implement V2SI and V4HI shuffles 2020-05-26 15:17:51 +02:00
ABOUT-GCC-NLS
acinclude.m4
aclocal.m4 bootstrap: Update requirement to C++11. 2020-05-18 14:29:18 -04:00
addresses.h
adjust-alignment.c Include memmodel.h in adjust-alignment.c 2020-05-21 17:02:18 +02:00
alias.c
alias.h
align.h
alloc-pool.c
alloc-pool.h Use const for some function arguments. 2020-05-05 15:54:57 +02:00
array-traits.h
asan.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
asan.h
attribs.c attribs: Don't diagnose attribute exclusions during error recovery [PR94705] 2020-04-23 09:54:14 +02:00
attribs.h
auto-inc-dec.c
auto-profile.c
auto-profile.h
backend.h
BASE-VER Bump BASE-VER. 2020-04-30 17:35:51 +02:00
basic-block.h
bb-reorder.c
bb-reorder.h
bitmap.c
bitmap.h Use const for some function arguments. 2020-05-05 15:54:57 +02:00
brig-builtins.def
builtin-attrs.def
builtin-types.def
builtins.c
builtins.def
builtins.h
caller-save.c
calls.c calls: Remove FIXME for cxx17_empty_base_field_p 2020-04-29 13:47:21 +01:00
calls.h calls: Remove FIXME for cxx17_empty_base_field_p 2020-04-29 13:47:21 +01:00
ccmp.c
ccmp.h
cfg-flags.def
cfg.c
cfg.h
cfganal.c
cfganal.h
cfgbuild.c
cfgbuild.h
cfgcleanup.c
cfgcleanup.h
cfgexpand.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
cfgexpand.h
cfghooks.c preserve EDGE_DFS_BACK across split_edge 2020-05-12 12:28:24 +02:00
cfghooks.h
cfgloop.c
cfgloop.h
cfgloopanal.c
cfgloopmanip.c middle-end/94964 - avoid EH loop entry with CP_SIMPLE_PREHEADERS 2020-05-06 13:36:46 +02:00
cfgloopmanip.h
cfgrtl.c Fix -fcompare-debug issue in purge_dead_edges [PR95080] 2020-05-13 11:22:37 +02:00
cfgrtl.h
cgraph.c openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
cgraph.h openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
cgraphbuild.c
cgraphclones.c
cgraphunit.c openmp: Implement discovery of implicit declare target to clauses 2020-05-12 09:17:09 +02:00
ChangeLog Revert "Add ChangeLog entry for my last commit." 2020-05-26 08:07:30 +02:00
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ChangeLog.dataflow
ChangeLog.gimple-classes
ChangeLog.graphite
ChangeLog.jit
ChangeLog.lib
ChangeLog.ptr
ChangeLog.tree-ssa
ChangeLog.tuples
cif-code.def
collect2-aix.c
collect2-aix.h
collect2.c
collect2.h
collect-utils.c
collect-utils.h
color-macros.h
combine-stack-adj.c csa, postreload: Improve csa after recent cselib changes [PR94516] 2020-05-05 16:34:51 +02:00
combine.c csa: Fix --enable-checking=yes,df bootstrap failure in csa [PR94961] 2020-05-08 09:30:54 +02:00
common.md
common.opt revamp dump and aux output names 2020-05-26 04:30:15 -03:00
compare-elim.c
conditions.h
config.build
config.gcc RISC-V: Add shorten_memrefs pass. 2020-05-12 14:43:48 -07:00
config.host
config.in --with-{documentation,changes}-root-url tweaks 2020-04-30 11:49:40 +02:00
configure bootstrap: Update requirement to C++11. 2020-05-18 14:29:18 -04:00
configure.ac bootstrap: Update requirement to C++11. 2020-05-18 14:29:18 -04:00
context.c
context.h
convert.c
convert.h
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
coretypes.h
coroutine-builtins.def
coroutine-passes.cc
coverage.c
coverage.h
cppbuiltin.c
cppbuiltin.h
cppdefault.c
cppdefault.h
cprop.c
cse.c cse: Use simplify_replace_fn_rtx to process notes [PR94740] 2020-04-30 20:00:52 +01:00
cselib.c
cselib.h
cstamp-h.in
data-streamer-in.c
data-streamer-out.c
data-streamer.c
data-streamer.h
DATESTAMP Daily bump. 2020-05-26 00:16:21 +00:00
dbgcnt.c
dbgcnt.def tree-optimization/95045 - fix SM with exit exiting multiple loops 2020-05-12 08:22:19 +02:00
dbgcnt.h
dbxout.c
dbxout.h
dce.c
dce.h
ddg.c
ddg.h
debug.c
debug.h
defaults.h
DEV-PHASE
df-core.c
df-problems.c
df-scan.c
df.h
dfp.c
dfp.h
diagnostic-color.c
diagnostic-color.h
diagnostic-core.h
diagnostic-event-id.h
diagnostic-format-json.cc
diagnostic-metadata.h
diagnostic-path.h
diagnostic-show-locus.c
diagnostic-url.h
diagnostic.c
diagnostic.def
diagnostic.h
digraph.cc
digraph.h
dojump.c
dojump.h
dominance.c
dominance.h
domwalk.c
domwalk.h
double-int.c
double-int.h
dse.c
dump-context.h
dumpfile.c Provide hint for misspelled -fdump-foo options. 2020-05-05 16:02:06 +02:00
dumpfile.h Provide hint for misspelled -fdump-foo options. 2020-05-05 16:02:06 +02:00
dwarf2asm.c
dwarf2asm.h
dwarf2cfi.c aarch64: Fix .cfi_window_save with pac-ret [PR94515] 2020-04-27 09:10:05 +01:00
dwarf2out.c revamp dump and aux output names 2020-05-26 04:30:15 -03:00
dwarf2out.h
early-remat.c
edit-context.c
edit-context.h
emit-rtl.c Fix non-comforming expander for floatv2div2sf2,floatunsv2div2sf2,fix_truncv2sfv2di,fixuns_truncv2sfv2di. 2020-05-26 11:41:15 +08:00
emit-rtl.h Add patch_area_size and patch_area_entry to crtl 2020-05-01 21:04:01 -07:00
errors.c
errors.h
escaped_string.h
et-forest.c
et-forest.h
except.c
except.h
exec-tool.in
explow.c Make anti_adjust_stack_and_probe_stack_clash extern and use it for Z 2020-05-14 08:16:27 +02:00
explow.h Make anti_adjust_stack_and_probe_stack_clash extern and use it for Z 2020-05-14 08:16:27 +02:00
expmed.c
expmed.h
expr.c
expr.h
fibonacci_heap.c
fibonacci_heap.h
file-find.c
file-find.h
file-prefix-map.c
file-prefix-map.h
final.c
fixed-value.c
fixed-value.h
flag-types.h
flags.h
fold-const-call.c
fold-const-call.h
fold-const.c match.pd: Move (X & C) eqne (Y & C) -> -> (X ^ Y) & C eqne 0 opt to match.pd [PR94718] 2020-05-04 10:57:46 +02:00
fold-const.h
fp-test.c
FSFChangeLog
FSFChangeLog.10
FSFChangeLog.11
function-abi.cc
function-abi.h
function-tests.c
function.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
function.h openmp: Also implicitly mark as declare target to functions mentioned in target regions 2020-05-14 09:48:32 +02:00
fwprop.c
gcc-ar.c
gcc-main.c
gcc-plugin.h
gcc-rich-location.c
gcc-rich-location.h
gcc-symtab.h
gcc.c revamp dump and aux output names 2020-05-26 04:30:15 -03:00
gcc.h
gcov-counter.def
gcov-dump.c
gcov-io.c
gcov-io.h Add caveat about parsing of .gcda and .gcno files. 2020-05-11 09:25:46 +02:00
gcov-iov.c
gcov-tool.c
gcov.c gcov: print total_lines summary for all files. 2020-05-05 16:04:32 +02:00
gcse-common.c
gcse-common.h
gcse.c
gcse.h
gdbasan.in
gdbhooks.py
gdbinit.in
gen-pass-instances.awk
genattr-common.c
genattr.c
genattrtab.c
genautomata.c
gencfn-macros.c
gencheck.c
genchecksum.c
gencodes.c
genconditions.c
genconfig.c
genconstants.c
genemit.c
genenums.c
generic-match-head.c
generic-match.h
genextract.c
genflags.c
gengenrtl.c
gengtype-lex.l
gengtype-parse.c
gengtype-state.c
gengtype.c
gengtype.h
genhooks.c
genmatch.c
genmddeps.c
genmddump.c
genmodes.c
genmultilib
genopinit.c
genoutput.c
genpeep.c
genpreds.c
genrecog.c
gensupport.c
gensupport.h
gentarget-def.c
ggc-common.c
ggc-internal.h
ggc-none.c
ggc-page.c
ggc-tests.c
ggc.h
gimple-builder.c
gimple-builder.h
gimple-expr.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
gimple-expr.h
gimple-fold.c Fold &MEM[0 + CST]->a.b.c to a constant 2020-05-12 08:27:59 +02:00
gimple-fold.h
gimple-iterator.c
gimple-iterator.h
gimple-laddress.c
gimple-loop-interchange.cc
gimple-loop-jam.c
gimple-loop-versioning.cc
gimple-low.c
gimple-low.h
gimple-match-head.c
gimple-match.h
gimple-predict.h
gimple-pretty-print.c
gimple-pretty-print.h
gimple-ssa-backprop.c
gimple-ssa-evrp-analyze.c
gimple-ssa-evrp-analyze.h
gimple-ssa-evrp.c
gimple-ssa-isolate-paths.c
gimple-ssa-nonnull-compare.c
gimple-ssa-split-paths.c tree-optimization/95133 - avoid abnormal edges in path splitting 2020-05-15 12:11:37 +02:00
gimple-ssa-sprintf.c tree-optimization: Fix use of uninitialized variable [PR94774] 2020-04-29 15:51:47 +02:00
gimple-ssa-store-merging.c Fix internal error on store to FP component at -O2 2020-05-25 22:19:03 +02:00
gimple-ssa-strength-reduction.c
gimple-ssa-warn-alloca.c
gimple-ssa-warn-restrict.c PR middle-end/94647 - bogus -Warray-bounds on strncpy into a larger member array from a smaller array 2020-04-21 11:11:06 -06:00
gimple-ssa-warn-restrict.h
gimple-ssa.h
gimple-streamer-in.c
gimple-streamer-out.c
gimple-streamer.h
gimple-walk.c
gimple-walk.h
gimple.c
gimple.def
gimple.h
gimplify-me.c
gimplify-me.h
gimplify.c openmp: Ensure copy ctor for composite distribute parallel for class iterators is instantiated [PR95197] 2020-05-26 09:35:21 +02:00
gimplify.h
glimits.h
godump.c
graph.c
graph.h
graphds.c
graphds.h
graphite-dependences.c
graphite-isl-ast-to-gimple.c
graphite-optimize-isl.c
graphite-poly.c
graphite-scop-detection.c
graphite-sese-to-poly.c
graphite.c
graphite.h
graphviz.cc
graphviz.h
gsstruct.def
gstab.h
gsyms.h
gsyslimits.h
gtm-builtins.def
haifa-sched.c
hard-reg-set.h
hash-map-tests.c
hash-map-traits.h
hash-map.h
hash-set-tests.c
hash-set.h
hash-table.c
hash-table.h c++: spec_hasher and TYPENAME_TYPE resolution [PR95223] 2020-05-20 09:15:48 -04:00
hash-traits.h
highlev-plugin-common.h
hooks.c
hooks.h
host-default.c
hosthooks-def.h
hosthooks.h
hsa-brig-format.h
hsa-brig.c
hsa-builtins.def
hsa-common.c
hsa-common.h
hsa-dump.c
hsa-gen.c Fix clang [-Wmisleading-indentation] in hsa-gen.c. 2020-05-15 12:34:27 +02:00
hsa-regalloc.c
hw-doloop.c
hw-doloop.h
hwint.c
hwint.h
ifcvt.c
ifcvt.h
inchash.c
inchash.h
incpath.c
incpath.h
init-regs.c
input.c
input.h
insn-addr.h
insn-notes.def
int-vector-builder.h
internal-fn.c internal-fn: Avoid dropping the lhs of some calls [PR94941] 2020-05-04 21:21:16 +01:00
internal-fn.def
internal-fn.h
intl.c
intl.h
ipa-comdats.c Fix ICE on invalid calls_comdat_local flag [pr94582] 2020-04-20 15:25:50 +02:00
ipa-cp.c
ipa-devirt.c
ipa-fnsummary.c
ipa-fnsummary.h
ipa-hsa.c
ipa-icf-gimple.c
ipa-icf-gimple.h
ipa-icf.c
ipa-icf.h
ipa-inline-analysis.c
ipa-inline-transform.c ipa: Cgraph verification fix (PR 94856) 2020-04-30 17:59:00 +02:00
ipa-inline.c
ipa-inline.h
ipa-param-manipulation.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
ipa-param-manipulation.h
ipa-polymorphic-call.c
ipa-predicate.c
ipa-predicate.h
ipa-profile.c
ipa-prop.c
ipa-prop.h
ipa-pure-const.c
ipa-ref.c
ipa-ref.h
ipa-reference.c
ipa-reference.h
ipa-split.c
ipa-sra.c
ipa-utils.c
ipa-utils.h
ipa-visibility.c
ipa.c openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
ira-build.c
ira-color.c Improve hard reg preference propapagation. 2020-05-08 16:51:40 -04:00
ira-conflicts.c
ira-costs.c
ira-emit.c
ira-int.h
ira-lives.c
ira.c
ira.h
is-a.h
json.cc
json.h
jump.c
langhooks-def.h
langhooks.c
langhooks.h
LANGUAGES
lcm.c
lcm.h
libfuncs.h
limitx.h
limity.h
lists.c
lock-and-run.sh
loop-doloop.c Fold (add -1; zero_ext; add +1) operations to zero_ext when not overflow(PR37451, PR61837) 2020-05-14 21:06:50 -05:00
loop-init.c
loop-invariant.c
loop-iv.c
loop-unroll.c
loop-unroll.h
lower-subreg.c
lower-subreg.h
lra-assigns.c
lra-coalesce.c
lra-constraints.c
lra-eliminations.c
lra-int.h
lra-lives.c
lra-remat.c
lra-spills.c
lra.c
lra.h
lto-cgraph.c openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
lto-compress.c Fill up {,un}compression stats for ZSTD in LTO. 2020-05-20 14:39:21 +02:00
lto-compress.h
lto-opts.c
lto-section-in.c
lto-section-names.h
lto-section-out.c Improve LTO streaming dumps 2020-05-22 15:44:10 +02:00
lto-streamer-in.c Simplify streaming of SCC components 2020-05-22 12:30:14 +02:00
lto-streamer-out.c Do not stream redundant stuff 2020-05-25 14:41:33 +02:00
lto-streamer.c
lto-streamer.h Do not stream redundant stuff 2020-05-25 14:41:33 +02:00
lto-wrapper.c revamp dump and aux output names 2020-05-26 04:30:15 -03:00
machmode.def
machmode.h
main.c
Makefile.in Fix alignment for local variable [PR90811] 2020-05-20 15:17:48 +08:00
match.pd tree: Add vector_element_bits(_tree) [PR94980 1/3] 2020-05-12 09:01:10 +01:00
mcf.c
mem-stats-traits.h
mem-stats.h Use const for some function arguments. 2020-05-05 15:54:57 +02:00
memmodel.h
memory-block.cc
memory-block.h
mkconfig.sh
mode-classes.def
mode-switching.c
modulo-sched.c
multiple_target.c
omp-builtins.def
omp-expand.c OpenACC: Avoid ICE in type-cast 'async', 'wait' clauses 2020-04-23 15:58:09 +01:00
omp-expand.h
omp-general.c openmp: Ensure copy ctor for composite distribute parallel for class iterators is instantiated [PR95197] 2020-05-26 09:35:21 +02:00
omp-general.h openmp: Ensure copy ctor for composite distribute parallel for class iterators is instantiated [PR95197] 2020-05-26 09:35:21 +02:00
omp-grid.c
omp-grid.h
omp-low.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
omp-low.h
omp-offload.c openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
omp-offload.h openmp: Implement discovery of implicit declare target to clauses 2020-05-12 09:17:09 +02:00
omp-simd-clone.c openmp: cgraph support for late declare variant resolution 2020-05-14 09:58:53 +02:00
omp-simd-clone.h
ONEWS
opt-functions.awk optgen: make more sanity checks for enums. 2020-05-05 16:13:46 +02:00
opt-gather.awk
opt-include.awk
opt-problem.cc
opt-problem.h
opt-read.awk optgen: make more sanity checks for enums. 2020-05-05 16:13:46 +02:00
opt-suggestions.c
opt-suggestions.h
optabs-libfuncs.c
optabs-libfuncs.h
optabs-query.c
optabs-query.h
optabs-tree.c
optabs-tree.h
optabs.c Shortcut identity VEC_PERM expansion [PR94710] 2020-04-23 21:59:01 +02:00
optabs.def
optabs.h
optc-gen.awk
optc-save-gen.awk
opth-gen.awk
optinfo-emit-json.cc
optinfo-emit-json.h
optinfo.cc
optinfo.h
opts-common.c
opts-diagnostic.h
opts-global.c Provide hint for misspelled -fdump-foo options. 2020-05-05 16:02:06 +02:00
opts.c revamp dump and aux output names 2020-05-26 04:30:15 -03:00
opts.h --with-{documentation,changes}-root-url tweaks 2020-04-30 11:49:40 +02:00
ordered-hash-map-tests.cc
ordered-hash-map.h
output.h
params.opt
pass_manager.h
passes.c
passes.def Fix alignment for local variable [PR90811] 2020-05-20 15:17:48 +08:00
plugin.c
plugin.def
plugin.h
poly-int-types.h
poly-int.h
postreload-gcse.c
postreload.c csa: Fix --enable-checking=yes,df bootstrap failure in csa [PR94961] 2020-05-08 09:30:54 +02:00
predict.c
predict.def
predict.h
prefix.c
prefix.h
pretty-print.c diagnostics: Fix spelling in comment 2020-04-30 14:43:30 +01:00
pretty-print.h
print-rtl-function.c
print-rtl.c
print-rtl.h
print-tree.c
print-tree.h
profile-count.c
profile-count.h
profile.c
profile.h
range-op.cc
range-op.h
range.cc
range.h
read-md.c
read-md.h
read-rtl-function.c
read-rtl-function.h
read-rtl.c
README.Portability
real.c middle-end/95118 - fix printing of denormal zero 2020-05-14 10:50:05 +02:00
real.h
realmpfr.c
realmpfr.h
recog.c
recog.h
ree.c
reg-notes.def
reg-stack.c
regcprop.c
regcprop.h
reginfo.c
regrename.c
regrename.h
regs.h
regset.h
regstat.c
reload1.c
reload.c
reload.h
reorg.c
resource.c dbr: Filter-out TARGET_FLAGS_REGNUM from end_of_function_needs. 2020-05-09 02:51:48 +02:00
resource.h
rtl-error.c
rtl-error.h
rtl-iter.h
rtl-tests.c
rtl.c
rtl.def
rtl.h csa: Fix --enable-checking=yes,df bootstrap failure in csa [PR94961] 2020-05-08 09:30:54 +02:00
rtlanal.c csa: Fix --enable-checking=yes,df bootstrap failure in csa [PR94961] 2020-05-08 09:30:54 +02:00
rtlhash.c
rtlhash.h
rtlhooks-def.h
rtlhooks.c
rtx-vector-builder.c
rtx-vector-builder.h
run-rtl-passes.c
run-rtl-passes.h
sancov.c
sanitizer.def
sanopt.c ASAN: clear DECL_NOT_GIMPLE_REG_P. 2020-05-12 10:23:09 +02:00
sbitmap.c
sbitmap.h
sched-deps.c RISC-V: Add shorten_memrefs pass. 2020-05-12 14:43:48 -07:00
sched-ebb.c
sched-int.h
sched-rgn.c
sel-sched-dump.c
sel-sched-dump.h
sel-sched-ir.c
sel-sched-ir.h
sel-sched.c
sel-sched.h
selftest-diagnostic.c
selftest-diagnostic.h
selftest-rtl.c
selftest-rtl.h
selftest-run-tests.c Fix warning URLs for Fortran and analyzer [PR 92830] 2020-04-27 15:02:57 -04:00
selftest.c
selftest.h Fix warning URLs for Fortran and analyzer [PR 92830] 2020-04-27 15:02:57 -04:00
sese.c
sese.h Use const for some function arguments. 2020-05-05 15:54:57 +02:00
shortest-paths.h
shrink-wrap.c
shrink-wrap.h
signop.h
simplify-rtx.c
sort.cc
sparseset.c
sparseset.h
spellcheck-tree.c
spellcheck-tree.h
spellcheck.c
spellcheck.h
sreal.c
sreal.h
ssa-iterators.h
ssa.h
stab.def
stack-ptr-mod.c
statistics.c
statistics.h
stmt.c
stmt.h
stor-layout.c ubsan: Avoid -Wpadded warnings [PR94641] 2020-04-21 17:06:31 +02:00
stor-layout.h
store-motion.c
streamer-hooks.c
streamer-hooks.h
stringpool.c
stringpool.h
substring-locations.c
substring-locations.h
symbol-summary.h
symtab.c Fix spacing in symtab_node::dump_references. 2020-04-20 14:09:41 +02:00
sync-builtins.def
system.h
target-def.h
target-globals.c
target-globals.h
target-hooks-macros.h
target-insns.def
target.def add vectype parameter to add_stmt_cost hook 2020-05-13 17:19:38 +02:00
target.h add vec_info * parameters where needed 2020-05-05 09:48:03 +02:00
targhooks.c add vectype parameter to add_stmt_cost hook 2020-05-13 17:19:38 +02:00
targhooks.h add vectype parameter to add_stmt_cost hook 2020-05-13 17:19:38 +02:00
timevar.c
timevar.def
timevar.h
toplev.c revamp dump and aux output names 2020-05-26 04:30:15 -03:00
toplev.h
tracer.c
tracer.h
trans-mem.c
trans-mem.h
tree-affine.c Add handling of MULT_EXPR/PLUS_EXPR for wrapping overflow in affine combination(PR83403) 2020-05-10 21:12:46 -05:00
tree-affine.h
tree-call-cdce.c
tree-cfg.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-cfg.h
tree-cfgcleanup.c
tree-cfgcleanup.h
tree-chrec.c
tree-chrec.h
tree-complex.c
tree-core.h extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-data-ref.c Add missing unit dependence vector in data dependence analysis 2020-05-13 11:37:47 +08:00
tree-data-ref.h
tree-dfa.c Fix availability compute during VN DOM elimination 2020-05-08 13:34:03 +02:00
tree-dfa.h
tree-diagnostic-path.cc
tree-diagnostic.c
tree-diagnostic.h
tree-dump.c
tree-dump.h
tree-eh.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-eh.h
tree-emutls.c
tree-hash-traits.h
tree-hasher.h
tree-if-conv.c
tree-if-conv.h
tree-inline.c middle-end/95231 - revert parts of PR95171 2020-05-20 13:27:46 +02:00
tree-inline.h
tree-into-ssa.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-into-ssa.h
tree-iterator.c
tree-iterator.h
tree-loop-distribution.c Add missing unit dependence vector in data dependence analysis 2020-05-13 11:37:47 +08:00
tree-nested.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-nested.h
tree-nrv.c
tree-object-size.c PR middle-end/92815 - spurious -Wstringop-overflow writing into a flexible array of an extern struct 2020-05-18 15:24:12 -06:00
tree-object-size.h
tree-outof-ssa.c
tree-outof-ssa.h
tree-parloops.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-parloops.h
tree-pass.h Fix alignment for local variable [PR90811] 2020-05-20 15:17:48 +08:00
tree-phinodes.c
tree-phinodes.h
tree-predcom.c
tree-pretty-print.c tree-pretty-print: Handle boolean types 2020-05-11 16:51:48 +01:00
tree-pretty-print.h
tree-profile.c
tree-scalar-evolution.c
tree-scalar-evolution.h
tree-sra.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-sra.h
tree-ssa-address.c
tree-ssa-address.h
tree-ssa-alias.c
tree-ssa-alias.h
tree-ssa-ccp.c
tree-ssa-ccp.h
tree-ssa-coalesce.c
tree-ssa-coalesce.h
tree-ssa-copy.c
tree-ssa-dce.c
tree-ssa-dce.h
tree-ssa-dom.c
tree-ssa-dom.h
tree-ssa-dse.c
tree-ssa-dse.h
tree-ssa-forwprop.c tree-optimization/95308 - really avoid forward propagating of &TMR 2020-05-25 12:41:36 +02:00
tree-ssa-ifcombine.c
tree-ssa-live.c remove dead debug-bind resets 2020-05-12 15:52:03 +02:00
tree-ssa-live.h
tree-ssa-loop-ch.c
tree-ssa-loop-im.c tree-optimization/95295 - fix wrong-code with SM 2020-05-25 13:39:26 +02:00
tree-ssa-loop-ivcanon.c
tree-ssa-loop-ivopts.c
tree-ssa-loop-ivopts.h
tree-ssa-loop-manip.c
tree-ssa-loop-manip.h
tree-ssa-loop-niter.c
tree-ssa-loop-niter.h
tree-ssa-loop-prefetch.c
tree-ssa-loop-split.c
tree-ssa-loop-unswitch.c
tree-ssa-loop.c
tree-ssa-loop.h
tree-ssa-math-opts.c Fold single imm use of a FMA if it is a negation [PR95060] 2020-05-13 11:21:02 +02:00
tree-ssa-operands.c Wrap global variables in tree-ssa-operands.c into a class. 2020-05-07 13:45:34 -04:00
tree-ssa-operands.h
tree-ssa-phiopt.c cselim: Don't assume it is safe to cstore replace a store to a local variable with unknown offset [PR94734] 2020-04-25 00:10:01 +02:00
tree-ssa-phiprop.c
tree-ssa-pre.c
tree-ssa-propagate.c
tree-ssa-propagate.h
tree-ssa-reassoc.c Fix bogus calls to set_rtx_cost. 2020-05-07 14:00:18 -04:00
tree-ssa-sccvn.c tree-optimization/95049 - fix not terminating RPO VN iteration 2020-05-11 17:56:31 +02:00
tree-ssa-sccvn.h
tree-ssa-scopedtables.c
tree-ssa-scopedtables.h
tree-ssa-sink.c tree-optimization/95284 - amend previous store commoning fix 2020-05-25 11:17:09 +02:00
tree-ssa-strlen.c
tree-ssa-strlen.h
tree-ssa-structalias.c ipa/94947 - avoid using externally_visible_p () 2020-05-07 19:42:22 +02:00
tree-ssa-tail-merge.c
tree-ssa-ter.c
tree-ssa-ter.h
tree-ssa-threadbackward.c
tree-ssa-threadedge.c
tree-ssa-threadedge.h
tree-ssa-threadupdate.c
tree-ssa-threadupdate.h
tree-ssa-uncprop.c
tree-ssa-uninit.c
tree-ssa.c extend DECL_GIMPLE_REG_P to all types 2020-05-07 15:38:20 +02:00
tree-ssa.h
tree-ssanames.c
tree-ssanames.h
tree-stdarg.c
tree-stdarg.h
tree-streamer-in.c Do not stream redundant stuff 2020-05-25 14:41:33 +02:00
tree-streamer-out.c Do not stream redundant stuff 2020-05-25 14:41:33 +02:00
tree-streamer.c Fix hashing of prestreamed nodes 2020-05-22 12:31:34 +02:00
tree-streamer.h
tree-switch-conversion.c Fix bogus calls to set_rtx_cost. 2020-05-07 14:00:18 -04:00
tree-switch-conversion.h
tree-tailcall.c
tree-vect-data-refs.c tree: Add vector_element_bits(_tree) [PR94980 1/3] 2020-05-12 09:01:10 +01:00
tree-vect-generic.c tree-vect-generic: Fix bitfield widths [PR94980 3/3] 2020-05-12 09:01:13 +01:00
tree-vect-loop-manip.c add vec_info * parameters where needed 2020-05-05 09:48:03 +02:00
tree-vect-loop.c enfoce SLP_TREE_VECTYPE for invariants 2020-05-22 12:26:27 +02:00
tree-vect-patterns.c tree: Add vector_element_bits(_tree) [PR94980 1/3] 2020-05-12 09:01:10 +01:00
tree-vect-slp.c tree-optimization/95309 - fix invariant SLP node costing 2020-05-25 16:02:08 +02:00
tree-vect-stmts.c tree-optimization/95327 - fix another vectorizable_shift const SLP op 2020-05-26 15:58:32 +02:00
tree-vector-builder.c
tree-vector-builder.h
tree-vectorizer.c add vectype parameter to add_stmt_cost hook 2020-05-13 17:19:38 +02:00
tree-vectorizer.h enfoce SLP_TREE_VECTYPE for invariants 2020-05-22 12:26:27 +02:00
tree-vrp.c PR middle-end/94940 - spurious -Warray-bounds for a zero length array member of union 2020-05-18 15:07:48 -06:00
tree-vrp.h Revert previous patch: 2020-05-17 13:56:55 +02:00
tree.c Simplify types of TYPE_VALUES in enumeral types 2020-05-26 10:14:38 +02:00
tree.def
tree.h PR middle-end/92815 - spurious -Wstringop-overflow writing into a flexible array of an extern struct 2020-05-18 15:24:12 -06:00
treestruct.def
tristate.cc
tristate.h
tsan.c
tsan.h
tsystem.h
typeclass.h
typed-splay-tree.c
typed-splay-tree.h
ubsan.c ubsan: Avoid -Wpadded warnings [PR94641] 2020-04-21 17:06:31 +02:00
ubsan.h
unique-ptr-tests.cc
valtrack.c
valtrack.h
value-prof.c
value-prof.h
value-range.cc
value-range.h
var-tracking.c var-tracking.c: Fix possible use of uninitialized variable pre 2020-04-30 08:12:42 +02:00
varasm.c Add patch_area_size and patch_area_entry to crtl 2020-05-01 21:04:01 -07:00
varasm.h
varpool.c
vec-perm-indices.c
vec-perm-indices.h
vec.c
vec.h
vector-builder.h
version.c
version.h
vmsdbg.h
vmsdbgout.c
vr-values.c Revert previous patch: 2020-05-17 13:56:55 +02:00
vr-values.h
vtable-verify.c
vtable-verify.h
web.c
wide-int-bitmask.h
wide-int-print.cc
wide-int-print.h
wide-int.cc
wide-int.h
xcoff.h
xcoffout.c
xcoffout.h

Copyright (C) 2000-2020 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 now 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
---------------

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.


Avoid unnecessary test before free
----------------------------------

Since SunOS 4 stopped being a reasonable portability target,
(which happened around 2007) there has been no need to guard
against "free (NULL)".  Thus, any guard like the following
constitutes a redundant test:

  if (P)
    free (P);

It is better to avoid the test.[*]
Instead, simply free P, regardless of whether it is NULL.

[*] However, if your profiling exposes a test like this in a
performance-critical loop, say where P is nearly always NULL, and
the cost of calling free on a NULL pointer would be prohibitively
high, consider using __builtin_expect, e.g., like this:

  if (__builtin_expect (ptr != NULL, 0))
    free (ptr);



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.