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From: Adhemerval Zanella <azanella@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/azanella/clang] Use -ffloat-store iff compiler supports it Date: Thu, 21 Dec 2023 18:55:27 +0000 (GMT) [thread overview] Message-ID: <20231221185527.4ABD53858404@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1da9ccc888b092a6693870084188e1ce16fbbb61 commit 1da9ccc888b092a6693870084188e1ce16fbbb61 Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> Date: Thu Mar 24 13:12:43 2022 -0300 Use -ffloat-store iff compiler supports it Diff: --- configure | 24 ++++++++++++++++++++++++ configure.ac | 10 ++++++++++ math/Makefile | 4 ++-- 3 files changed, 36 insertions(+), 2 deletions(-) diff --git a/configure b/configure index 6330b1e0ab..a811663fe4 100755 --- a/configure +++ b/configure @@ -7364,6 +7364,30 @@ printf "%s\n" "$libc_cv_cc_rounding_math" >&6; } config_vars="$config_vars config-cflags-frounding-math = $libc_cv_cc_rounding_math" +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for compiler option that -ffloat-store" >&5 +printf %s "checking for compiler option that -ffloat-store... " >&6; } +if test ${libc_cv_cc_float_store+y} +then : + printf %s "(cached) " >&6 +else $as_nop + if { ac_try='${CC-cc} -Werror -ffloat-store -xc /dev/null -S -o /dev/null' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; } +then : + libc_cv_cc_float_store=-ffloat-store +else $as_nop + libc_cv_cc_float_store= +fi + +fi +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_float_store" >&5 +printf "%s\n" "$libc_cv_cc_float_store" >&6; } +config_vars="$config_vars +config-cflags-float-store = $libc_cv_cc_float_store" + { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC accepts -fno-tree-loop-distribute-patterns with \ __attribute__ ((__optimize__))" >&5 printf %s "checking if $CC accepts -fno-tree-loop-distribute-patterns with \ diff --git a/configure.ac b/configure.ac index 704e4c259f..1f9d8b6e5e 100644 --- a/configure.ac +++ b/configure.ac @@ -1478,6 +1478,16 @@ LIBC_TRY_CC_OPTION([-Werror -frounding-math], LIBC_CONFIG_VAR([config-cflags-frounding-math], [$libc_cv_cc_rounding_math]) +dnl Determine if compiler supports -ffloat-store +AC_CACHE_CHECK([for compiler option that -ffloat-store], + libc_cv_cc_float_store, [dnl +LIBC_TRY_CC_OPTION([-Werror -ffloat-store], + [libc_cv_cc_float_store=-ffloat-store], + [libc_cv_cc_float_store=]) +]) +LIBC_CONFIG_VAR([config-cflags-float-store], + [$libc_cv_cc_float_store]) + AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl cat > conftest.c <<EOF diff --git a/math/Makefile b/math/Makefile index 3e9701c0d1..85a9cb3026 100644 --- a/math/Makefile +++ b/math/Makefile @@ -407,7 +407,7 @@ $(objpfx)test-tgmath3-macro-list.out: gen-tgmath-tests.py libm-test-fast-math-cflags = -fno-builtin -D__FAST_MATH__ -DTEST_FAST_MATH libm-test-vec-cflags = $(libm-test-fast-math-cflags) -fno-inline \ - -ffloat-store -D_OPENMP=201307 -Wno-unknown-pragmas + $(libc_cv_cc_float_store) -D_OPENMP=201307 -Wno-unknown-pragmas CFLAGS-test-double-vlen4-wrappers.c += $(double-vlen4-arch-ext-cflags) @@ -423,7 +423,7 @@ CFLAGS-test-float-vlen16-wrappers.c += $(float-vlen16-arch-ext-cflags) # raise spurious exceptions for sNaNs, but also do not test for # exceptions. Thus both versions of the classification macros are # validated. -libm-test-no-inline-cflags = -fno-inline -ffloat-store -fno-builtin \ +libm-test-no-inline-cflags = -fno-inline $(libc_cv_cc_float_store) -fno-builtin \ $(config-cflags-signaling-nans) CFLAGS-test-tgmath.c += -fno-builtin # The following testcase uses very long lines (>3 million), so it may take a
next reply other threads:[~2023-12-21 18:55 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-12-21 18:55 Adhemerval Zanella [this message] -- strict thread matches above, loose matches on Subject: below -- 2024-04-17 20:08 Adhemerval Zanella 2024-04-02 15:55 Adhemerval Zanella 2024-02-09 17:33 Adhemerval Zanella 2024-02-07 14:08 Adhemerval Zanella 2024-01-29 17:58 Adhemerval Zanella 2023-09-28 17:53 Adhemerval Zanella 2023-08-30 12:38 Adhemerval Zanella 2023-02-09 19:49 Adhemerval Zanella 2022-10-28 17:43 Adhemerval Zanella 2022-10-04 13:00 Adhemerval Zanella 2022-06-09 21:21 Adhemerval Zanella 2022-06-09 13:18 Adhemerval Zanella 2022-06-03 14:07 Adhemerval Zanella 2022-05-13 14:21 Adhemerval Zanella 2022-05-12 19:35 Adhemerval Zanella 2022-05-10 18:25 Adhemerval Zanella 2022-04-29 14:05 Adhemerval Zanella 2022-04-04 12:55 Adhemerval Zanella 2022-03-31 19:08 Adhemerval Zanella 2022-03-29 20:31 Adhemerval Zanella
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