[PATCH] math: Fix x86_64 build for -Os (BZ 33367)

[H.J. Lu]

On Mon, Sep 8, 2025 at 2:05 PM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> On Mon, Sep 8, 2025 at 2:01 PM H.J. Lu <hjl.tools@gmail.com> wrote:
> >

> >
>
> My GCC patch:
>
> https://patchwork.sourceware.org/project/gcc/list/?series=51782
>
> I am testing this:
>
> diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile
> b/sysdeps/x86_64/fpu/multiarch/Makefile
> index 708b14297f..0b2caac7a0 100644
> --- a/sysdeps/x86_64/fpu/multiarch/Makefile
> +++ b/sysdeps/x86_64/fpu/multiarch/Makefile
> @@ -158,11 +158,14 @@ CFLAGS-s_sin-avx.c = -msse2avx -DSSE2AVX
>  CFLAGS-s_tan-avx.c = -msse2avx -DSSE2AVX
>  CFLAGS-s_sincos-avx.c = -msse2avx -DSSE2AVX
>
> -CFLAGS-s_modf-sse4_1.c = -msse4.1 -fno-builtin-modff32x -fno-builtin-modff64
> -CFLAGS-s_modff-sse4_1.c = -msse4.1 -fno-builtin-modff32
> +CFLAGS-s_modf-sse4_1.c = -msse4.1 -fno-builtin-modff32x \
> + -fno-builtin-modff64 -fno-trapping-math
> +CFLAGS-s_modff-sse4_1.c = -msse4.1 -fno-builtin-modff32 \
> + -fno-trapping-math
>
> -CFLAGS-s_modf-avx.c = -mavx -fno-builtin-modff32x -fno-builtin-modff64
> -CFLAGS-s_modff-avx.c = -mavx -fno-builtin-modff32
> +CFLAGS-s_modf-avx.c = -mavx -fno-builtin-modff32x -fno-builtin-modff64 \
> +       -fno-trapping-math
> +CFLAGS-s_modff-avx.c = -mavx -fno-builtin-modff32 -fno-trapping-math
>  endif
>
>  ifeq ($(subdir),mathvec)
>

I got many failures:

FAIL: ctype/tst-ctype-tls-dlopen-static
FAIL: debug/tst-sprintf-fortify-rdonly-static
FAIL: dlfcn/tststatic
FAIL: dlfcn/tststatic2
FAIL: dlfcn/tststatic3
FAIL: dlfcn/tststatic4
FAIL: dlfcn/tststatic5
FAIL: elf/ifuncmain1picstatic
FAIL: elf/ifuncmain1static
FAIL: elf/ifuncmain2picstatic
FAIL: elf/ifuncmain2static
FAIL: elf/ifuncmain4picstatic
FAIL: elf/ifuncmain4static
FAIL: elf/ifuncmain5picstatic
FAIL: elf/ifuncmain5static
FAIL: elf/ifuncmain7picstatic
FAIL: elf/ifuncmain7static
FAIL: elf/ifuncmain9picstatic
FAIL: elf/ifuncmain9static
FAIL: elf/tst-array1-static
FAIL: elf/tst-array1-static-cmp
FAIL: elf/tst-array5-static
FAIL: elf/tst-array5-static-cmp
FAIL: elf/tst-bz15311
FAIL: elf/tst-bz28937
FAIL: elf/tst-cpu-features-cpuinfo-static
FAIL: elf/tst-cpu-features-supports-static
FAIL: elf/tst-dl-iter-static
FAIL: elf/tst-dl-printf-static
FAIL: elf/tst-dl_find_object-static
FAIL: elf/tst-dlopen-sgid
FAIL: elf/tst-dso-ordering-all2-0
FAIL: elf/tst-dso-ordering-all3-0
FAIL: elf/tst-dso-ordering-all3-1
FAIL: elf/tst-dso-ordering-all3-2
FAIL: elf/tst-dso-ordering-all3-3
FAIL: elf/tst-dso-ordering-all4-0
FAIL: elf/tst-dso-ordering-all4-1
FAIL: elf/tst-dso-ordering-all4-10
FAIL: elf/tst-dso-ordering-all4-11
FAIL: elf/tst-dso-ordering-all4-12
FAIL: elf/tst-dso-ordering-all4-13
FAIL: elf/tst-dso-ordering-all4-14
FAIL: elf/tst-dso-ordering-all4-15
FAIL: elf/tst-dso-ordering-all4-16
FAIL: elf/tst-dso-ordering-all4-17
FAIL: elf/tst-dso-ordering-all4-18
FAIL: elf/tst-dso-ordering-all4-19
FAIL: elf/tst-dso-ordering-all4-2
FAIL: elf/tst-dso-ordering-all4-20
FAIL: elf/tst-dso-ordering-all4-21
FAIL: elf/tst-dso-ordering-all4-22
FAIL: elf/tst-dso-ordering-all4-23
FAIL: elf/tst-dso-ordering-all4-24
FAIL: elf/tst-dso-ordering-all4-25
FAIL: elf/tst-dso-ordering-all4-26
FAIL: elf/tst-dso-ordering-all4-27
FAIL: elf/tst-dso-ordering-all4-28
FAIL: elf/tst-dso-ordering-all4-29
FAIL: elf/tst-dso-ordering-all4-3
FAIL: elf/tst-dso-ordering-all4-30
FAIL: elf/tst-dso-ordering-all4-31
FAIL: elf/tst-dso-ordering-all4-32
FAIL: elf/tst-dso-ordering-all4-33
FAIL: elf/tst-dso-ordering-all4-34
FAIL: elf/tst-dso-ordering-all4-35
FAIL: elf/tst-dso-ordering-all4-36
FAIL: elf/tst-dso-ordering-all4-37
FAIL: elf/tst-dso-ordering-all4-38
FAIL: elf/tst-dso-ordering-all4-39
FAIL: elf/tst-dso-ordering-all4-4
FAIL: elf/tst-dso-ordering-all4-40
FAIL: elf/tst-dso-ordering-all4-41
FAIL: elf/tst-dso-ordering-all4-42
FAIL: elf/tst-dso-ordering-all4-43
FAIL: elf/tst-dso-ordering-all4-44
FAIL: elf/tst-dso-ordering-all4-45
FAIL: elf/tst-dso-ordering-all4-46
FAIL: elf/tst-dso-ordering-all4-47
FAIL: elf/tst-dso-ordering-all4-48
FAIL: elf/tst-dso-ordering-all4-49
FAIL: elf/tst-dso-ordering-all4-5
FAIL: elf/tst-dso-ordering-all4-50
FAIL: elf/tst-dso-ordering-all4-51
FAIL: elf/tst-dso-ordering-all4-52
FAIL: elf/tst-dso-ordering-all4-53
FAIL: elf/tst-dso-ordering-all4-54
FAIL: elf/tst-dso-ordering-all4-55
FAIL: elf/tst-dso-ordering-all4-56
FAIL: elf/tst-dso-ordering-all4-6
FAIL: elf/tst-dso-ordering-all4-7
FAIL: elf/tst-dso-ordering-all4-8
FAIL: elf/tst-dso-ordering-all4-9
FAIL: elf/tst-dso-ordering1
FAIL: elf/tst-dso-ordering10
FAIL: elf/tst-dso-ordering2
FAIL: elf/tst-dso-ordering3
FAIL: elf/tst-dso-ordering4
FAIL: elf/tst-dso-ordering5
FAIL: elf/tst-dso-ordering6
FAIL: elf/tst-dso-ordering7
FAIL: elf/tst-dso-ordering8
FAIL: elf/tst-dso-ordering9
FAIL: elf/tst-dst-static
FAIL: elf/tst-env-setuid-static
FAIL: elf/tst-env-setuid-tunables
FAIL: elf/tst-execstack-prog-static
FAIL: elf/tst-execstack-prog-static-noexecstack
FAIL: elf/tst-execstack-prog-static-tunable
FAIL: elf/tst-get-cpu-features-static
FAIL: elf/tst-getauxval-static
FAIL: elf/tst-ldconfig-X
FAIL: elf/tst-ldconfig-bad-aux-cache
FAIL: elf/tst-ldconfig-ld_so_conf-update
FAIL: elf/tst-ldconfig-p
FAIL: elf/tst-ldconfig-soname
FAIL: elf/tst-linkall-static
FAIL: elf/tst-pie-address-static
FAIL: elf/tst-pie-bss-static
FAIL: elf/tst-ptrguard1-static
FAIL: elf/tst-rtld-run-static
FAIL: elf/tst-single_threaded-pthread-static
FAIL: elf/tst-single_threaded-static
FAIL: elf/tst-single_threaded-static-dlopen
FAIL: elf/tst-stackguard1-static
FAIL: elf/tst-tls-allocation-failure-static
FAIL: elf/tst-tls-allocation-failure-static-patched
FAIL: elf/tst-tls1-static
FAIL: elf/tst-tls1-static-non-pie
FAIL: elf/tst-tls9-static
FAIL: elf/tst-tlsalign-extern-static
FAIL: elf/tst-tlsalign-static
FAIL: elf/tst-tunables
FAIL: elf/tst-tunables-enable_secure
FAIL: gmon/tst-gmon-static
FAIL: gmon/tst-gmon-static-gprof
FAIL: gmon/tst-gmon-static-pie
FAIL: gmon/tst-gmon-static-pie-gprof
FAIL: inet/tst-deadline
FAIL: inet/tst-idna_name_classify
FAIL: io/tst-statx
FAIL: libio/tst-cleanup-default-static
FAIL: libio/tst-cleanup-default-static-cmp
FAIL: libio/tst-cleanup-nostart-stop-gc-static
FAIL: libio/tst-cleanup-nostart-stop-gc-static-cmp
FAIL: libio/tst-cleanup-start-stop-gc-static
FAIL: libio/tst-cleanup-start-stop-gc-static-cmp
FAIL: libio/tst-stdio-static
FAIL: localedata/bug-setlocale1-static
FAIL: localedata/tst-langinfo-setlocale-static
FAIL: malloc/tst-aligned-alloc-static
FAIL: malloc/tst-interpose-static-nothread
FAIL: malloc/tst-interpose-static-thread
FAIL: math/atest-exp
FAIL: math/atest-exp2
FAIL: math/atest-sincos
FAIL: math/test-fpucw-ieee-static
FAIL: math/test-fpucw-static
FAIL: math/test-signgam-uchar-init-static
FAIL: math/test-signgam-uchar-static
FAIL: math/test-signgam-uint-init-static
FAIL: math/test-signgam-uint-static
FAIL: math/test-signgam-ullong-init-static
FAIL: math/test-signgam-ullong-static
FAIL: misc/tst-align-clone-internal
FAIL: misc/tst-clone2-internal
FAIL: misc/tst-clone3-internal
FAIL: misc/tst-empty
FAIL: misc/tst-fd_to_filename
FAIL: misc/tst-getpid1-internal
FAIL: nptl/tst-cancel21-static
FAIL: nptl/tst-cancel24-static
FAIL: nptl/tst-cond11-static
FAIL: nptl/tst-cond8-static
FAIL: nptl/tst-locale1
FAIL: nptl/tst-locale2
FAIL: nptl/tst-mutex8-static
FAIL: nptl/tst-mutexpi8-static
FAIL: nptl/tst-pthread-gdb-attach-static
FAIL: nptl/tst-pthread-key1-static
FAIL: nptl/tst-pthread_exit-nothreads-static
FAIL: nptl/tst-sem11-static
FAIL: nptl/tst-sem12-static
FAIL: nptl/tst-stackguard1-static
FAIL: nss/tst-field
FAIL: posix/tst-affinity-static
FAIL: posix/tst-exec-static
FAIL: posix/tst-libc-message
FAIL: posix/tst-spawn-static
FAIL: posix/tst-sysconf-cache-linesize-static
FAIL: resolv/tst-ns_name_length_uncompressed
FAIL: resolv/tst-ns_rr_cursor
FAIL: resolv/tst-ns_samebinaryname
FAIL: resolv/tst-resolv-txnid-collision
FAIL: setjmp/tst-setjmp-static
FAIL: stdlib/tst-getenv-static
FAIL: stdlib/tst-secure-getenv
FAIL: string/test-memswap

-O2 works.


--
H.J.