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File _service:tar_scm:0015-LoongArch-Add-enum-style-mexplicit-relocs-option.patch of Package gcc
From 56403837a7859f0a7ccbc56c055261c9adf22fb8 Mon Sep 17 00:00:00 2001 From: Xi Ruoyao <xry111@xry111.site> Date: Mon, 23 Oct 2023 15:23:11 +0800 Subject: [PATCH 015/188] LoongArch: Add enum-style -mexplicit-relocs= option To take a better balance between scheduling and relaxation when -flto is enabled, add three-way -mexplicit-relocs={auto,none,always} options. The old -mexplicit-relocs and -mno-explicit-relocs options are still supported, they are mapped to -mexplicit-relocs=always and -mexplicit-relocs=none. The default choice is determined by probing assembler capabilities at build time. If the assembler does not supports explicit relocs at all, the default will be none; if it supports explicit relocs but not relaxation, the default will be always; if both explicit relocs and relaxation are supported, the default will be auto. Currently auto is same as none. We will make auto more clever in following changes. gcc/ChangeLog: * config/loongarch/genopts/loongarch-strings: Add strings for -mexplicit-relocs={auto,none,always}. * config/loongarch/genopts/loongarch.opt.in: Add options for -mexplicit-relocs={auto,none,always}. * config/loongarch/loongarch-str.h: Regenerate. * config/loongarch/loongarch.opt: Regenerate. * config/loongarch/loongarch-def.h (EXPLICIT_RELOCS_AUTO): Define. (EXPLICIT_RELOCS_NONE): Define. (EXPLICIT_RELOCS_ALWAYS): Define. (N_EXPLICIT_RELOCS_TYPES): Define. * config/loongarch/loongarch.cc (loongarch_option_override_internal): Error out if the old-style -m[no-]explicit-relocs option is used with -mexplicit-relocs={auto,none,always} together. Map -mno-explicit-relocs to -mexplicit-relocs=none and -mexplicit-relocs to -mexplicit-relocs=always for backward compatibility. Set a proper default for -mexplicit-relocs= based on configure-time probed linker capability. Update a diagnostic message to mention -mexplicit-relocs=always instead of the old-style -mexplicit-relocs. (loongarch_handle_model_attribute): Update a diagnostic message to mention -mexplicit-relocs=always instead of the old-style -mexplicit-relocs. * config/loongarch/loongarch.h (TARGET_EXPLICIT_RELOCS): Define. --- .../loongarch/genopts/loongarch-strings | 6 +++++ gcc/config/loongarch/genopts/loongarch.opt.in | 21 ++++++++++++++-- gcc/config/loongarch/loongarch-def.h | 6 +++++ gcc/config/loongarch/loongarch-str.h | 5 ++++ gcc/config/loongarch/loongarch.cc | 24 +++++++++++++++++-- gcc/config/loongarch/loongarch.h | 3 +++ gcc/config/loongarch/loongarch.opt | 21 ++++++++++++++-- 7 files changed, 80 insertions(+), 6 deletions(-) diff --git a/gcc/config/loongarch/genopts/loongarch-strings b/gcc/config/loongarch/genopts/loongarch-strings index eb5086fe3..6c8a42af2 100644 --- a/gcc/config/loongarch/genopts/loongarch-strings +++ b/gcc/config/loongarch/genopts/loongarch-strings @@ -65,3 +65,9 @@ STR_CMODEL_TS tiny-static STR_CMODEL_MEDIUM medium STR_CMODEL_LARGE large STR_CMODEL_EXTREME extreme + +# -mexplicit-relocs +OPTSTR_EXPLICIT_RELOCS explicit-relocs +STR_EXPLICIT_RELOCS_AUTO auto +STR_EXPLICIT_RELOCS_NONE none +STR_EXPLICIT_RELOCS_ALWAYS always diff --git a/gcc/config/loongarch/genopts/loongarch.opt.in b/gcc/config/loongarch/genopts/loongarch.opt.in index 74cf4a7f7..e7df1964a 100644 --- a/gcc/config/loongarch/genopts/loongarch.opt.in +++ b/gcc/config/loongarch/genopts/loongarch.opt.in @@ -176,10 +176,27 @@ mmax-inline-memcpy-size= Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init(1024) -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 & !HAVE_AS_MRELAX_OPTION) +Enum +Name(explicit_relocs) Type(int) +The code model option names for -mexplicit-relocs: + +EnumValue +Enum(explicit_relocs) String(@@STR_EXPLICIT_RELOCS_AUTO@@) Value(EXPLICIT_RELOCS_AUTO) + +EnumValue +Enum(explicit_relocs) String(@@STR_EXPLICIT_RELOCS_NONE@@) Value(EXPLICIT_RELOCS_NONE) + +EnumValue +Enum(explicit_relocs) String(@@STR_EXPLICIT_RELOCS_ALWAYS@@) Value(EXPLICIT_RELOCS_ALWAYS) + +mexplicit-relocs= +Target RejectNegative Joined Enum(explicit_relocs) Var(la_opt_explicit_relocs) Init(M_OPT_UNSET) Use %reloc() assembly operators. +mexplicit-relocs +Target Var(la_opt_explicit_relocs_backward) Init(M_OPT_UNSET) +Use %reloc() assembly operators (for backward compatibility). + ; The code model option names for -mcmodel. Enum Name(cmodel) Type(int) diff --git a/gcc/config/loongarch/loongarch-def.h b/gcc/config/loongarch/loongarch-def.h index eb8e53b20..4757de14b 100644 --- a/gcc/config/loongarch/loongarch-def.h +++ b/gcc/config/loongarch/loongarch-def.h @@ -100,6 +100,12 @@ extern const char* loongarch_cmodel_strings[]; #define CMODEL_EXTREME 5 #define N_CMODEL_TYPES 6 +/* enum explicit_relocs */ +#define EXPLICIT_RELOCS_AUTO 0 +#define EXPLICIT_RELOCS_NONE 1 +#define EXPLICIT_RELOCS_ALWAYS 2 +#define N_EXPLICIT_RELOCS_TYPES 3 + /* The common default value for variables whose assignments are triggered by command-line options. */ diff --git a/gcc/config/loongarch/loongarch-str.h b/gcc/config/loongarch/loongarch-str.h index ecfebf9db..037e9e583 100644 --- a/gcc/config/loongarch/loongarch-str.h +++ b/gcc/config/loongarch/loongarch-str.h @@ -64,4 +64,9 @@ along with GCC; see the file COPYING3. If not see #define STR_CMODEL_LARGE "large" #define STR_CMODEL_EXTREME "extreme" +#define OPTSTR_EXPLICIT_RELOCS "explicit-relocs" +#define STR_EXPLICIT_RELOCS_AUTO "auto" +#define STR_EXPLICIT_RELOCS_NONE "none" +#define STR_EXPLICIT_RELOCS_ALWAYS "always" + #endif /* LOONGARCH_STR_H */ diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc index e22a64600..3258c8655 100644 --- a/gcc/config/loongarch/loongarch.cc +++ b/gcc/config/loongarch/loongarch.cc @@ -7383,6 +7383,25 @@ loongarch_option_override_internal (struct gcc_options *opts, loongarch_update_gcc_opt_status (&la_target, opts, opts_set); loongarch_cpu_option_override (&la_target, opts, opts_set); + if (la_opt_explicit_relocs != M_OPT_UNSET + && la_opt_explicit_relocs_backward != M_OPT_UNSET) + error ("do not use %qs (with %qs) and %qs (without %qs) together", + "-mexplicit-relocs=", "=", + la_opt_explicit_relocs_backward ? "-mexplicit-relocs" + : "-mno-explicit-relocs", "="); + + if (la_opt_explicit_relocs_backward != M_OPT_UNSET) + la_opt_explicit_relocs = (la_opt_explicit_relocs_backward + ? EXPLICIT_RELOCS_ALWAYS + : EXPLICIT_RELOCS_NONE); + + if (la_opt_explicit_relocs == M_OPT_UNSET) + la_opt_explicit_relocs = (HAVE_AS_EXPLICIT_RELOCS + ? (HAVE_AS_MRELAX_OPTION + ? EXPLICIT_RELOCS_AUTO + : EXPLICIT_RELOCS_ALWAYS) + : EXPLICIT_RELOCS_NONE); + if (TARGET_ABI_LP64) flag_pcc_struct_return = 0; @@ -7413,7 +7432,7 @@ loongarch_option_override_internal (struct gcc_options *opts, case CMODEL_EXTREME: if (!TARGET_EXPLICIT_RELOCS) error ("code model %qs needs %s", - "extreme", "-mexplicit-relocs"); + "extreme", "-mexplicit-relocs=always"); if (opts->x_flag_plt) { @@ -7717,7 +7736,8 @@ loongarch_handle_model_attribute (tree *node, tree name, tree arg, int, if (!TARGET_EXPLICIT_RELOCS) { error_at (DECL_SOURCE_LOCATION (decl), - "%qE attribute requires %s", name, "-mexplicit-relocs"); + "%qE attribute requires %s", name, + "-mexplicit-relocs=always"); *no_add_attrs = true; return NULL_TREE; } diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h index f7ddfc452..6e8ac293a 100644 --- a/gcc/config/loongarch/loongarch.h +++ b/gcc/config/loongarch/loongarch.h @@ -1236,3 +1236,6 @@ struct GTY (()) machine_function we just need "ibar" to avoid instruction hazard here. */ #undef CLEAR_INSN_CACHE #define CLEAR_INSN_CACHE(beg, end) __builtin_loongarch_ibar (0) + +#define TARGET_EXPLICIT_RELOCS \ + (la_opt_explicit_relocs == EXPLICIT_RELOCS_ALWAYS) diff --git a/gcc/config/loongarch/loongarch.opt b/gcc/config/loongarch/loongarch.opt index 34bd832bd..44376fd77 100644 --- a/gcc/config/loongarch/loongarch.opt +++ b/gcc/config/loongarch/loongarch.opt @@ -183,10 +183,27 @@ mmax-inline-memcpy-size= Target Joined RejectNegative UInteger Var(loongarch_max_inline_memcpy_size) Init(1024) -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 & !HAVE_AS_MRELAX_OPTION) +Enum +Name(explicit_relocs) Type(int) +The code model option names for -mexplicit-relocs: + +EnumValue +Enum(explicit_relocs) String(auto) Value(EXPLICIT_RELOCS_AUTO) + +EnumValue +Enum(explicit_relocs) String(none) Value(EXPLICIT_RELOCS_NONE) + +EnumValue +Enum(explicit_relocs) String(always) Value(EXPLICIT_RELOCS_ALWAYS) + +mexplicit-relocs= +Target RejectNegative Joined Enum(explicit_relocs) Var(la_opt_explicit_relocs) Init(M_OPT_UNSET) Use %reloc() assembly operators. +mexplicit-relocs +Target Var(la_opt_explicit_relocs_backward) Init(M_OPT_UNSET) +Use %reloc() assembly operators (for backward compatibility). + ; The code model option names for -mcmodel. Enum Name(cmodel) Type(int) -- 2.43.0
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