https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111425
--- Comment #4 from Frank Scheiner <frank.scheiner at web dot de> ---
(In reply to Richard Biener from comment #3)
Hi Richard,
in case you wanted me to test this reduced test case, I ran it through as if it
was the file in question. I needed to remove `-Werror=strict-prototypes` and
`-Werror=return-type` from the command line.
It does not reproduce the problem, though:
```
# ia64-linux-gcc -v -Wp,-MMD,net/ipv4/.fib_semantics.o.d -nostdinc
-I./arch/ia64/include -I./arch/ia64/include/generated -I./include
-I./arch/ia64/include/uapi -I./arch/ia64/include/generated/uapi
-I./include/uapi -I./include/generated/uapi -include
./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include
./include/linux/compiler_types.h -D__KERNEL__ -DHAVE_WORKING_TEXT_ALIGN
-DHAVE_MODEL_SMALL_ATTRIBUTE -DHAVE_SERIALIZE_DIRECTIVE -fmacro-prefix-map=./=
-std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE
-fno-strict-aliasing -pipe -ffixed-r13 -mfixed-range=f12-f15,f32-f127
-frename-registers -fno-optimize-sibling-calls -fno-delete-null-pointer-checks
-O2 -fno-allow-store-data-races -fno-stack-protector -fomit-frame-pointer
-ftrivial-auto-var-init=zero -fno-stack-clash-protection -falign-functions=32
-fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fconserve-stack
-Wall -Wundef -Werror=implicit-function-declaration -Werror=implicit-int
-Wno-format-security -Wno-trigraphs -Wno-frame-address
-Wno-address-of-packed-member -Wframe-larger-than=2048 -Wno-main
-Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-dangling-pointer
-Wvla -Wno-pointer-sign -Wcast-function-type -Wno-array-bounds
-Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time
-Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion
-Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-restrict
-Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation
-Wno-stringop-overflow -Wno-stringop-truncation -Wno-missing-field-initializers
-Wno-type-limits -Wno-shift-negative-value -Wno-maybe-uninitialized
-Wno-sign-compare -g -mconstant-gp
-DKBUILD_MODFILE='"net/ipv4/fib_semantics"' -DKBUILD_BASENAME='"fib_semantics"'
-DKBUILD_MODNAME='"fib_semantics"' -D__KBUILD_MODNAME=kmod_fib_semantics -c -o
net/ipv4/fib_semantics.o net/ipv4/fib_semantics.c
Using built-in specs.
COLLECT_GCC=ia64-linux-gcc
Target: ia64-linux
Configured with: /home/arnd/git/gcc/configure --host=x86_64-linux-gnu
--build=aarch64-linux --target=ia64-linux --enable-targets=all
--prefix=/home/arnd/cross/x86_64/gcc-13.2.0-nolibc/ia64-linux
--enable-languages=c --without-headers --disable-bootstrap --disable-nls
--disable-threads --disable-shared --disable-libmudflap --disable-libssp
--disable-libgomp --disable-decimal-float --disable-libquadmath
--disable-libatomic --disable-libcc1 --disable-libmpx --enable-checking=release
--with-static-standard-libraries --with-system-libunwind
Thread model: single
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-nostdinc' '-I' './arch/ia64/include' '-I'
'./arch/ia64/include/generated' '-I' './include' '-I'
'./arch/ia64/include/uapi' '-I' './arch/ia64/include/generated/uapi' '-I'
'./include/uapi' '-I' './include/generated/uapi' '-include'
'./include/linux/compiler-version.h' '-include' './include/linux/kconfig.h'
'-include' './include/linux/compiler_types.h' '-D' '__KERNEL__' '-D'
'HAVE_WORKING_TEXT_ALIGN' '-D' 'HAVE_MODEL_SMALL_ATTRIBUTE' '-D'
'HAVE_SERIALIZE_DIRECTIVE' '-fmacro-prefix-map=./=' '-std=gnu11'
'-fshort-wchar' '-funsigned-char' '-fno-common' '-fno-PIE'
'-fno-strict-aliasing' '-pipe' '-ffixed-r13' '-mfixed-range=f12-f15,f32-f127'
'-frename-registers' '-fno-optimize-sibling-calls'
'-fno-delete-null-pointer-checks' '-O2' '-fno-allow-store-data-races'
'-fno-stack-protector' '-fomit-frame-pointer' '-ftrivial-auto-var-init=zero'
'-fno-stack-clash-protection' '-falign-functions=32' '-fstrict-flex-arrays=3'
'-fno-strict-overflow' '-fstack-check=no' '-fconserve-stack' '-Wall' '-Wundef'
'-Werror=implicit-function-declaration' '-Werror=implicit-int'
'-Wno-format-security' '-Wno-trigraphs' '-Wno-frame-address'
'-Wno-address-of-packed-member' '-Wframe-larger-than=2048' '-Wno-main'
'-Wunused-const-variable=0' '-Wdangling-pointer=0' '-Wvla' '-Wno-pointer-sign'
'-Wcast-function-type' '-Warray-bounds=0'
'-Walloc-size-larger-than=18446744073709551615EiB' '-Wimplicit-fallthrough=5'
'-Werror=date-time' '-Werror=incompatible-pointer-types'
'-Werror=designated-init' '-Wenum-conversion' '-Wno-unused-but-set-variable'
'-Wunused-const-variable=0' '-Wno-restrict' '-Wno-packed-not-aligned'
'-Wformat-overflow=0' '-Wformat-truncation=0' '-Wstringop-overflow=0'
'-Wno-stringop-truncation' '-Wno-missing-field-initializers' '-Wno-type-limits'
'-Wno-shift-negative-value' '-Wno-maybe-uninitialized' '-Wno-sign-compare' '-g'
'-mconstant-gp' '-D' 'KBUILD_MODFILE="net/ipv4/fib_semantics"' '-D'
'KBUILD_BASENAME="fib_semantics"' '-D' 'KBUILD_MODNAME="fib_semantics"' '-D'
'__KBUILD_MODNAME=kmod_fib_semantics' '-c' '-o' 'net/ipv4/fib_semantics.o'
'-dumpdir' 'net/ipv4/'
/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../libexec/gcc/ia64-linux/13.2.0/cc1
-quiet -nostdinc -v -I ./arch/ia64/include -I ./arch/ia64/include/generated -I
./include -I ./arch/ia64/include/uapi -I ./arch/ia64/include/generated/uapi -I
./include/uapi -I ./include/generated/uapi -iprefix
/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/ia64-linux/13.2.0/ -D
__KERNEL__ -D HAVE_WORKING_TEXT_ALIGN -D HAVE_MODEL_SMALL_ATTRIBUTE -D
HAVE_SERIALIZE_DIRECTIVE -D KBUILD_MODFILE="net/ipv4/fib_semantics" -D
KBUILD_BASENAME="fib_semantics" -D KBUILD_MODNAME="fib_semantics" -D
__KBUILD_MODNAME=kmod_fib_semantics -include ./include/linux/compiler-version.h
-include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h
-MMD net/ipv4/.fib_semantics.o.d net/ipv4/fib_semantics.c -quiet -dumpdir
net/ipv4/ -dumpbase fib_semantics.c -dumpbase-ext .c
-mfixed-range=f12-f15,f32-f127 -mconstant-gp -g -O2 -Wall -Wundef
-Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security
-Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member
-Wframe-larger-than=2048 -Wno-main -Wunused-const-variable=0
-Wdangling-pointer=0 -Wvla -Wno-pointer-sign -Wcast-function-type
-Warray-bounds=0 -Walloc-size-larger-than=18446744073709551615EiB
-Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types
-Werror=designated-init -Wenum-conversion -Wno-unused-but-set-variable
-Wunused-const-variable=0 -Wno-restrict -Wno-packed-not-aligned
-Wformat-overflow=0 -Wformat-truncation=0 -Wstringop-overflow=0
-Wno-stringop-truncation -Wno-missing-field-initializers -Wno-type-limits
-Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -std=gnu11
-version -fmacro-prefix-map=./= -fshort-wchar -funsigned-char -fno-common
-fno-PIE -fno-strict-aliasing -ffixed-r13 -frename-registers
-fno-optimize-sibling-calls -fno-delete-null-pointer-checks
-fno-allow-store-data-races -fno-stack-protector -fomit-frame-pointer
-ftrivial-auto-var-init=zero -fno-stack-clash-protection -falign-functions=32
-fstrict-flex-arrays=3 -fno-strict-overflow -fstack-check=no -fconserve-stack
-o - |
/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/ia64-linux/13.2.0/../../../../ia64-linux/bin/as
-v -I ./arch/ia64/include -I ./arch/ia64/include/generated -I ./include -I
./arch/ia64/include/uapi -I ./arch/ia64/include/generated/uapi -I
./include/uapi -I ./include/generated/uapi -x -mconstant-gp -o
net/ipv4/fib_semantics.o
GNU assembler version 2.41 (ia64-linux) using BFD version (GNU Binutils) 2.41
GNU C11 (GCC) version 13.2.0 (ia64-linux)
compiled by GNU C version 13.1.0, GMP version 6.2.1, MPFR version
4.1.0, MPC version 1.2.1, isl version isl-0.24-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
#include "..." search starts here:
#include <...> search starts here:
./arch/ia64/include
./arch/ia64/include/generated
./include
./arch/ia64/include/uapi
./arch/ia64/include/generated/uapi
./include/uapi
./include/generated/uapi
End of search list.
Compiler executable checksum: 29919059dbfb73f2c0b8bce4b176419b
net/ipv4/fib_semantics.c: In function 'fib_info_num_path':
net/ipv4/fib_semantics.c:25:1: warning: control reaches end of non-void
function [-Wreturn-type]
25 | }
| ^
net/ipv4/fib_semantics.c: In function 'refcount_inc_not_zero':
net/ipv4/fib_semantics.c:15:10: warning: '__trans_tmp_13' is used uninitialized
[-Wuninitialized]
15 | while (!__trans_tmp_13)
| ^~~~~~~~~~~~~~~
net/ipv4/fib_semantics.c:13:9: note: '__trans_tmp_13' was declared here
13 | _Bool __trans_tmp_13;
| ^~~~~~~~~~~~~~
COMPILER_PATH=/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../libexec/gcc/ia64-linux/13.2.0/:/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../libexec/gcc/:/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/ia64-linux/13.2.0/../../../../ia64-linux/bin/
LIBRARY_PATH=/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/ia64-linux/13.2.0/:/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/:/opt/gcc-13.2.0-nolibc/ia64-linux/bin/../lib/gcc/ia64-linux/13.2.0/../../../../ia64-linux/lib/
COLLECT_GCC_OPTIONS='-v' '-nostdinc' '-I' './arch/ia64/include' '-I'
'./arch/ia64/include/generated' '-I' './include' '-I'
'./arch/ia64/include/uapi' '-I' './arch/ia64/include/generated/uapi' '-I'
'./include/uapi' '-I' './include/generated/uapi' '-include'
'./include/linux/compiler-version.h' '-include' './include/linux/kconfig.h'
'-include' './include/linux/compiler_types.h' '-D' '__KERNEL__' '-D'
'HAVE_WORKING_TEXT_ALIGN' '-D' 'HAVE_MODEL_SMALL_ATTRIBUTE' '-D'
'HAVE_SERIALIZE_DIRECTIVE' '-fmacro-prefix-map=./=' '-std=gnu11'
'-fshort-wchar' '-funsigned-char' '-fno-common' '-fno-PIE'
'-fno-strict-aliasing' '-pipe' '-ffixed-r13' '-mfixed-range=f12-f15,f32-f127'
'-frename-registers' '-fno-optimize-sibling-calls'
'-fno-delete-null-pointer-checks' '-O2' '-fno-allow-store-data-races'
'-fno-stack-protector' '-fomit-frame-pointer' '-ftrivial-auto-var-init=zero'
'-fno-stack-clash-protection' '-falign-functions=32' '-fstrict-flex-arrays=3'
'-fno-strict-overflow' '-fstack-check=no' '-fconserve-stack' '-Wall' '-Wundef'
'-Werror=implicit-function-declaration' '-Werror=implicit-int'
'-Wno-format-security' '-Wno-trigraphs' '-Wno-frame-address'
'-Wno-address-of-packed-member' '-Wframe-larger-than=2048' '-Wno-main'
'-Wunused-const-variable=0' '-Wdangling-pointer=0' '-Wvla' '-Wno-pointer-sign'
'-Wcast-function-type' '-Warray-bounds=0'
'-Walloc-size-larger-than=18446744073709551615EiB' '-Wimplicit-fallthrough=5'
'-Werror=date-time' '-Werror=incompatible-pointer-types'
'-Werror=designated-init' '-Wenum-conversion' '-Wno-unused-but-set-variable'
'-Wunused-const-variable=0' '-Wno-restrict' '-Wno-packed-not-aligned'
'-Wformat-overflow=0' '-Wformat-truncation=0' '-Wstringop-overflow=0'
'-Wno-stringop-truncation' '-Wno-missing-field-initializers' '-Wno-type-limits'
'-Wno-shift-negative-value' '-Wno-maybe-uninitialized' '-Wno-sign-compare' '-g'
'-mconstant-gp' '-D' 'KBUILD_MODFILE="net/ipv4/fib_semantics"' '-D'
'KBUILD_BASENAME="fib_semantics"' '-D' 'KBUILD_MODNAME="fib_semantics"' '-D'
'__KBUILD_MODNAME=kmod_fib_semantics' '-c' '-o' 'net/ipv4/fib_semantics.o'
'-dumpdir' 'net/ipv4/fib_semantics.'
# echo $?
0
```
If you need something else, just let me know.
Cheers,
Frank
