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From: LuluCheng <chenglulu@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-10170] LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are tur Date: Thu, 22 Feb 2024 03:16:56 +0000 (GMT) [thread overview] Message-ID: <20240222031657.05CBE3858C42@sourceware.org> (raw) https://gcc.gnu.org/g:20ef2df1667f04c854a07b736840061c4a62608b commit r12-10170-g20ef2df1667f04c854a07b736840061c4a62608b Author: Lulu Cheng <chenglulu@loongson.cn> Date: Fri Sep 15 10:22:49 2023 +0800 LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are turned off by default. gcc/ChangeLog: * config.in: Regenerate. * config/loongarch/genopts/loongarch.opt.in: Add compilation option mrelax. And set the initial value of explicit-relocs according to the detection status. * config/loongarch/gnu-user.h: When compiling with -mno-relax, pass the --no-relax option to the linker. * config/loongarch/loongarch-opts.h (HAVE_AS_MRELAX_OPTION): Define macro. * config/loongarch/loongarch.opt: Regenerate. * configure: Regenerate. * configure.ac: Add detection of support for binutils relax function. (cherry picked from commit 9bab65a77049edcc7afc59532173206ee816e726) Diff: --- gcc/config.in | 12 +++++++++++ gcc/config/loongarch/genopts/loongarch.opt.in | 5 +++++ gcc/config/loongarch/gnu-user.h | 4 ++-- gcc/config/loongarch/loongarch-opts.h | 4 ++++ gcc/config/loongarch/loongarch.opt | 5 +++++ gcc/configure | 31 +++++++++++++++++++++++++++ gcc/configure.ac | 4 ++++ 7 files changed, 63 insertions(+), 2 deletions(-) diff --git a/gcc/config.in b/gcc/config.in index cc638759a400..f5b6287a96a7 100644 --- a/gcc/config.in +++ b/gcc/config.in @@ -630,6 +630,12 @@ #endif +/* Define if your assembler supports -mrelax option. */ +#ifndef USED_FOR_TARGET +#undef HAVE_AS_MRELAX_OPTION +#endif + + /* Define if your assembler supports .mspabi_attribute. */ #ifndef USED_FOR_TARGET #undef HAVE_AS_MSPABI_ATTRIBUTE @@ -2214,6 +2220,12 @@ #endif +/* Define which stat syscall is able to handle 64bit indodes. */ +#ifndef USED_FOR_TARGET +#undef HOST_STAT_FOR_64BIT_INODES +#endif + + /* Define as const if the declaration of iconv() needs const. */ #ifndef USED_FOR_TARGET #undef ICONV_CONST diff --git a/gcc/config/loongarch/genopts/loongarch.opt.in b/gcc/config/loongarch/genopts/loongarch.opt.in index 61e7d72a0a1e..edc2ed045d79 100644 --- a/gcc/config/loongarch/genopts/loongarch.opt.in +++ b/gcc/config/loongarch/genopts/loongarch.opt.in @@ -177,3 +177,8 @@ Enum(cmodel) String(@@STR_CMODEL_EXTREME@@) Value(CMODEL_EXTREME) mcmodel= Target RejectNegative Joined Enum(cmodel) Var(la_opt_cmodel) Init(CMODEL_NORMAL) Specify the code model. + +mrelax +Target Var(loongarch_mrelax) Init(HAVE_AS_MRELAX_OPTION) +Take advantage of linker relaxations to reduce the number of instructions +required to materialize symbol addresses. diff --git a/gcc/config/loongarch/gnu-user.h b/gcc/config/loongarch/gnu-user.h index f050078da520..28ac8b0e1f63 100644 --- a/gcc/config/loongarch/gnu-user.h +++ b/gcc/config/loongarch/gnu-user.h @@ -46,8 +46,8 @@ along with GCC; see the file COPYING3. If not see #define GNU_USER_TARGET_LINK_SPEC \ "%{G*} %{shared} -m " GNU_USER_LINK_EMULATION \ "%{!shared: %{static} %{!static: %{rdynamic:-export-dynamic} " \ - "-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}" - + "-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}" \ + "%{mno-relax: --no-relax}" /* Similar to standard Linux, but adding -ffast-math support. */ #undef GNU_USER_TARGET_MATHFILE_SPEC diff --git a/gcc/config/loongarch/loongarch-opts.h b/gcc/config/loongarch/loongarch-opts.h index eaa6fc074482..60e682f57a07 100644 --- a/gcc/config/loongarch/loongarch-opts.h +++ b/gcc/config/loongarch/loongarch-opts.h @@ -87,4 +87,8 @@ loongarch_config_target (struct loongarch_target *target, while -m[no]-memcpy imposes a global constraint. */ #define TARGET_DO_OPTIMIZE_BLOCK_MOVE_P loongarch_do_optimize_block_move_p() +#ifndef HAVE_AS_MRELAX_OPTION +#define HAVE_AS_MRELAX_OPTION 0 +#endif + #endif /* LOONGARCH_OPTS_H */ diff --git a/gcc/config/loongarch/loongarch.opt b/gcc/config/loongarch/loongarch.opt index 3ff0d860413a..78b5e0cc4529 100644 --- a/gcc/config/loongarch/loongarch.opt +++ b/gcc/config/loongarch/loongarch.opt @@ -184,3 +184,8 @@ Enum(cmodel) String(extreme) Value(CMODEL_EXTREME) mcmodel= Target RejectNegative Joined Enum(cmodel) Var(la_opt_cmodel) Init(CMODEL_NORMAL) Specify the code model. + +mrelax +Target Var(loongarch_mrelax) Init(HAVE_AS_MRELAX_OPTION) +Take advantage of linker relaxations to reduce the number of instructions +required to materialize symbol addresses. diff --git a/gcc/configure b/gcc/configure index b4907d258be6..67cdd92a4f39 100755 --- a/gcc/configure +++ b/gcc/configure @@ -28871,6 +28871,37 @@ if test $gcc_cv_as_loongarch_dtprelword != yes; then $as_echo "#define HAVE_AS_DTPRELWORD 1" >>confdefs.h fi + { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for -mrelax option" >&5 +$as_echo_n "checking assembler for -mrelax option... " >&6; } +if ${gcc_cv_as_loongarch_relax+:} false; then : + $as_echo_n "(cached) " >&6 +else + gcc_cv_as_loongarch_relax=no + if test x$gcc_cv_as != x; then + $as_echo '.text' > conftest.s + if { ac_try='$gcc_cv_as $gcc_cv_as_flags -mrelax -o conftest.o conftest.s >&5' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; } + then + gcc_cv_as_loongarch_relax=yes + else + echo "configure: failed program was" >&5 + cat conftest.s >&5 + fi + rm -f conftest.o conftest.s + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_loongarch_relax" >&5 +$as_echo "$gcc_cv_as_loongarch_relax" >&6; } +if test $gcc_cv_as_loongarch_relax = yes; then + +$as_echo "#define HAVE_AS_MRELAX_OPTION 1" >>confdefs.h + +fi + ;; s390*-*-*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for .gnu_attribute support" >&5 diff --git a/gcc/configure.ac b/gcc/configure.ac index d369c4717b2f..e08ac5f4b49b 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -5336,6 +5336,10 @@ x: .dtprelword x+0x8000],, [AC_DEFINE(HAVE_AS_DTPRELWORD, 1, [Define if your assembler supports .dtprelword.])]) + gcc_GAS_CHECK_FEATURE([-mrelax option], gcc_cv_as_loongarch_relax, + [-mrelax], [.text],, + [AC_DEFINE(HAVE_AS_MRELAX_OPTION, 1, + [Define if your assembler supports -mrelax option.])]) ;; s390*-*-*) gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
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