* [PATCH v1] LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are turned off by default.
@ 2023-09-15 2:40 Lulu Cheng
2023-09-20 1:24 ` [pushed][PATCH " chenglulu
0 siblings, 1 reply; 2+ messages in thread
From: Lulu Cheng @ 2023-09-15 2:40 UTC (permalink / raw)
To: gcc-patches; +Cc: xry111, i, xuchenghua, Lulu Cheng
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-driver.h (ASM_SPEC): When compiling with
-mno-relax, pass the -mno-relax option to the assembler.
* 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.
---
gcc/config.in | 6 ++++
gcc/config/loongarch/genopts/loongarch.opt.in | 7 ++++-
gcc/config/loongarch/gnu-user.h | 3 +-
gcc/config/loongarch/loongarch-driver.h | 2 +-
gcc/config/loongarch/loongarch-opts.h | 4 +++
gcc/config/loongarch/loongarch.opt | 7 ++++-
gcc/configure | 31 +++++++++++++++++++
gcc/configure.ac | 4 +++
8 files changed, 60 insertions(+), 4 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index f0071456f03..d04718ad128 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -634,6 +634,12 @@
#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
diff --git a/gcc/config/loongarch/genopts/loongarch.opt.in b/gcc/config/loongarch/genopts/loongarch.opt.in
index 78a27dac806..9f98f2d845a 100644
--- a/gcc/config/loongarch/genopts/loongarch.opt.in
+++ b/gcc/config/loongarch/genopts/loongarch.opt.in
@@ -175,7 +175,7 @@ Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init
-mmax-inline-memcpy-size=SIZE Set the max size of memcpy to inline, default is 1024.
mexplicit-relocs
-Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS)
+Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS & !HAVE_AS_MRELAX_OPTION)
Use %reloc() assembly operators.
; The code model option names for -mcmodel.
@@ -208,3 +208,8 @@ Specify the code model.
mdirect-extern-access
Target Var(TARGET_DIRECT_EXTERN_ACCESS) Init(0)
Avoid using the GOT to access external symbols.
+
+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 fa1a5211419..9616d6e8a0b 100644
--- a/gcc/config/loongarch/gnu-user.h
+++ b/gcc/config/loongarch/gnu-user.h
@@ -48,7 +48,8 @@ along with GCC; see the file COPYING3. If not see
"%{!shared: %{static} " \
"%{!static: %{!static-pie: %{rdynamic:-export-dynamic} " \
"-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} " \
- "%{static-pie: -static -pie --no-dynamic-linker -z text}}"
+ "%{static-pie: -static -pie --no-dynamic-linker -z text}}" \
+ "%{mno-relax: --no-relax}"
/* Similar to standard Linux, but adding -ffast-math support. */
diff --git a/gcc/config/loongarch/loongarch-driver.h b/gcc/config/loongarch/loongarch-driver.h
index d917fcabd37..d859afcc9fe 100644
--- a/gcc/config/loongarch/loongarch-driver.h
+++ b/gcc/config/loongarch/loongarch-driver.h
@@ -53,7 +53,7 @@ along with GCC; see the file COPYING3. If not see
#undef ASM_SPEC
#define ASM_SPEC \
- "%{mabi=*} %(subtarget_asm_spec)"
+ "%{mabi=*} %{mno-relax} %(subtarget_asm_spec)"
extern const char*
diff --git a/gcc/config/loongarch/loongarch-opts.h b/gcc/config/loongarch/loongarch-opts.h
index 3c6ff2e0d44..2756939b05d 100644
--- a/gcc/config/loongarch/loongarch-opts.h
+++ b/gcc/config/loongarch/loongarch-opts.h
@@ -97,4 +97,8 @@ loongarch_update_gcc_opt_status (struct loongarch_target *target,
#define HAVE_AS_EXPLICIT_RELOCS 0
#endif
+#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 b06b58b5ba2..e1b085ae87c 100644
--- a/gcc/config/loongarch/loongarch.opt
+++ b/gcc/config/loongarch/loongarch.opt
@@ -182,7 +182,7 @@ Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init
-mmax-inline-memcpy-size=SIZE Set the max size of memcpy to inline, default is 1024.
mexplicit-relocs
-Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS)
+Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS & !HAVE_AS_MRELAX_OPTION)
Use %reloc() assembly operators.
; The code model option names for -mcmodel.
@@ -215,3 +215,8 @@ Specify the code model.
mdirect-extern-access
Target Var(TARGET_DIRECT_EXTERN_ACCESS) Init(0)
Avoid using the GOT to access external symbols.
+
+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 07e8a64afbb..d5e218e9a16 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -29073,6 +29073,37 @@ if test $gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support = yes; then
$as_echo "#define HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT 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
;;
diff --git a/gcc/configure.ac b/gcc/configure.ac
index cb4be11facd..019d0375a2f 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -5348,6 +5348,10 @@ x:
.cfi_endproc],,
[AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
[Define if your assembler supports eh_frame pcrel encoding.])])
+ 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],
--
2.31.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [pushed][PATCH v1] LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are turned off by default.
2023-09-15 2:40 [PATCH v1] LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are turned off by default Lulu Cheng
@ 2023-09-20 1:24 ` chenglulu
0 siblings, 0 replies; 2+ messages in thread
From: chenglulu @ 2023-09-20 1:24 UTC (permalink / raw)
To: gcc-patches; +Cc: xry111, i, xuchenghua
Pushed to r14-4160.
在 2023/9/15 上午10:40, Lulu Cheng 写道:
> 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-driver.h (ASM_SPEC): When compiling with
> -mno-relax, pass the -mno-relax option to the assembler.
> * 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.
> ---
> gcc/config.in | 6 ++++
> gcc/config/loongarch/genopts/loongarch.opt.in | 7 ++++-
> gcc/config/loongarch/gnu-user.h | 3 +-
> gcc/config/loongarch/loongarch-driver.h | 2 +-
> gcc/config/loongarch/loongarch-opts.h | 4 +++
> gcc/config/loongarch/loongarch.opt | 7 ++++-
> gcc/configure | 31 +++++++++++++++++++
> gcc/configure.ac | 4 +++
> 8 files changed, 60 insertions(+), 4 deletions(-)
>
> diff --git a/gcc/config.in b/gcc/config.in
> index f0071456f03..d04718ad128 100644
> --- a/gcc/config.in
> +++ b/gcc/config.in
> @@ -634,6 +634,12 @@
> #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
> diff --git a/gcc/config/loongarch/genopts/loongarch.opt.in b/gcc/config/loongarch/genopts/loongarch.opt.in
> index 78a27dac806..9f98f2d845a 100644
> --- a/gcc/config/loongarch/genopts/loongarch.opt.in
> +++ b/gcc/config/loongarch/genopts/loongarch.opt.in
> @@ -175,7 +175,7 @@ Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init
> -mmax-inline-memcpy-size=SIZE Set the max size of memcpy to inline, default is 1024.
>
> mexplicit-relocs
> -Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS)
> +Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS & !HAVE_AS_MRELAX_OPTION)
> Use %reloc() assembly operators.
>
> ; The code model option names for -mcmodel.
> @@ -208,3 +208,8 @@ Specify the code model.
> mdirect-extern-access
> Target Var(TARGET_DIRECT_EXTERN_ACCESS) Init(0)
> Avoid using the GOT to access external symbols.
> +
> +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 fa1a5211419..9616d6e8a0b 100644
> --- a/gcc/config/loongarch/gnu-user.h
> +++ b/gcc/config/loongarch/gnu-user.h
> @@ -48,7 +48,8 @@ along with GCC; see the file COPYING3. If not see
> "%{!shared: %{static} " \
> "%{!static: %{!static-pie: %{rdynamic:-export-dynamic} " \
> "-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} " \
> - "%{static-pie: -static -pie --no-dynamic-linker -z text}}"
> + "%{static-pie: -static -pie --no-dynamic-linker -z text}}" \
> + "%{mno-relax: --no-relax}"
>
>
> /* Similar to standard Linux, but adding -ffast-math support. */
> diff --git a/gcc/config/loongarch/loongarch-driver.h b/gcc/config/loongarch/loongarch-driver.h
> index d917fcabd37..d859afcc9fe 100644
> --- a/gcc/config/loongarch/loongarch-driver.h
> +++ b/gcc/config/loongarch/loongarch-driver.h
> @@ -53,7 +53,7 @@ along with GCC; see the file COPYING3. If not see
>
> #undef ASM_SPEC
> #define ASM_SPEC \
> - "%{mabi=*} %(subtarget_asm_spec)"
> + "%{mabi=*} %{mno-relax} %(subtarget_asm_spec)"
>
>
> extern const char*
> diff --git a/gcc/config/loongarch/loongarch-opts.h b/gcc/config/loongarch/loongarch-opts.h
> index 3c6ff2e0d44..2756939b05d 100644
> --- a/gcc/config/loongarch/loongarch-opts.h
> +++ b/gcc/config/loongarch/loongarch-opts.h
> @@ -97,4 +97,8 @@ loongarch_update_gcc_opt_status (struct loongarch_target *target,
> #define HAVE_AS_EXPLICIT_RELOCS 0
> #endif
>
> +#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 b06b58b5ba2..e1b085ae87c 100644
> --- a/gcc/config/loongarch/loongarch.opt
> +++ b/gcc/config/loongarch/loongarch.opt
> @@ -182,7 +182,7 @@ Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init
> -mmax-inline-memcpy-size=SIZE Set the max size of memcpy to inline, default is 1024.
>
> mexplicit-relocs
> -Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS)
> +Target Var(TARGET_EXPLICIT_RELOCS) Init(HAVE_AS_EXPLICIT_RELOCS & !HAVE_AS_MRELAX_OPTION)
> Use %reloc() assembly operators.
>
> ; The code model option names for -mcmodel.
> @@ -215,3 +215,8 @@ Specify the code model.
> mdirect-extern-access
> Target Var(TARGET_DIRECT_EXTERN_ACCESS) Init(0)
> Avoid using the GOT to access external symbols.
> +
> +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 07e8a64afbb..d5e218e9a16 100755
> --- a/gcc/configure
> +++ b/gcc/configure
> @@ -29073,6 +29073,37 @@ if test $gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support = yes; then
>
> $as_echo "#define HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT 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
>
> ;;
> diff --git a/gcc/configure.ac b/gcc/configure.ac
> index cb4be11facd..019d0375a2f 100644
> --- a/gcc/configure.ac
> +++ b/gcc/configure.ac
> @@ -5348,6 +5348,10 @@ x:
> .cfi_endproc],,
> [AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
> [Define if your assembler supports eh_frame pcrel encoding.])])
> + 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],
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-09-20 1:24 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-09-15 2:40 [PATCH v1] LoongArch: Check whether binutils supports the relax function. If supported, explicit relocs are turned off by default Lulu Cheng
2023-09-20 1:24 ` [pushed][PATCH " chenglulu
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).