https://gcc.gnu.org/g:b253b4695ddac43301bb572895095b9569165ff4
commit r14-9742-gb253b4695ddac43301bb572895095b9569165ff4
Author: mengqinggang <mengqingg...@loongson.cn>
Date: Tue Apr 2 09:57:20 2024 +0800
LoongArch: Add support for TLS descriptors.
Add support for TLS descriptors on normal code model and extreme
code model.
Normal code model instruction sequence:
-mno-explicit-relocs:
la.tls.desc $r4, s
add.d $r12, $r4, $r2
-mexplicit-relocs:
pcalau12i $r4,%desc_pc_hi20(s)
addi.d $r4,$r4,%desc_pc_lo12(s)
ld.d $r1,$r4,%desc_ld(s)
jirl $r1,$r1,%desc_call(s)
add.d $r12, $r4, $r2
Extreme code model instruction sequence:
-mno-explicit-relocs:
la.tls.desc $r4, $r12, s
add.d $r12, $r4, $r2
-mexplicit-relocs:
pcalau12i $r4,%desc_pc_hi20(s)
addi.d $r12,$r0,%desc_pc_lo12(s)
lu32i.d $r12,%desc64_pc_lo20(s)
lu52i.d $r12,$r12,%desc64_pc_hi12(s)
add.d $r4,$r4,$r12
ld.d $r1,$r4,%desc_ld(s)
jirl $r1,$r1,%desc_call(s)
add.d $r12, $r4, $r2
The default is still traditional TLS model, but can be configured with
--with-tls={trad,desc}. The default can change to TLS descriptors once
libc and LLVM support this.
gcc/ChangeLog:
* config.gcc: Add --with-tls option to change TLS flavor.
* config/loongarch/genopts/loongarch.opt.in: Add -mtls-dialect to
configure TLS flavor.
* config/loongarch/loongarch-def.h (struct loongarch_target): Add
tls_dialect.
* config/loongarch/loongarch-driver.cc (la_driver_init): Add tls
flavor.
* config/loongarch/loongarch-opts.cc (loongarch_init_target): Add
tls_dialect.
(loongarch_config_target): Ditto.
(loongarch_update_gcc_opt_status): Ditto.
* config/loongarch/loongarch-opts.h (loongarch_init_target): Ditto.
(TARGET_TLS_DESC): New define.
* config/loongarch/loongarch.cc (loongarch_symbol_insns): Add TLS
DESC instructions sequence length.
(loongarch_legitimize_tls_address): New TLS DESC instruction
sequence.
(loongarch_option_override_internal): Add la_opt_tls_dialect.
(loongarch_option_restore): Add la_target.tls_dialect.
* config/loongarch/loongarch.md (@got_load_tls_desc<mode>): Normal
code model for TLS DESC.
(got_load_tls_desc_off64): Extreme cmode model for TLS DESC.
* config/loongarch/loongarch.opt: Regenerate.
* config/loongarch/loongarch.opt.urls: Ditto.
* doc/invoke.texi: Add a description of the compilation option
'-mtls-dialect={trad,desc}'.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/cmodel-extreme-1.c: Add -mtls-dialect=trad.
* gcc.target/loongarch/cmodel-extreme-2.c: Ditto.
* gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c: Ditto.
*
gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c:
Ditto.
* gcc.target/loongarch/func-call-medium-1.c: Ditto.
* gcc.target/loongarch/func-call-medium-2.c: Ditto.
* gcc.target/loongarch/func-call-medium-3.c: Ditto.
* gcc.target/loongarch/func-call-medium-4.c: Ditto.
* gcc.target/loongarch/tls-extreme-macro.c: Ditto.
* gcc.target/loongarch/tls-gd-noplt.c: Ditto.
* gcc.target/loongarch/explicit-relocs-auto-extreme-tls-desc.c: New
test.
* gcc.target/loongarch/explicit-relocs-auto-tls-desc.c: New test.
* gcc.target/loongarch/explicit-relocs-extreme-tls-desc.c: New test.
* gcc.target/loongarch/explicit-relocs-tls-desc.c: New test.
Co-authored-by: Lulu Cheng <chengl...@loongson.cn>
Co-authored-by: Xi Ruoyao <xry...@xry111.site>
Diff:
---
gcc/config.gcc | 19 +++++-
gcc/config/loongarch/genopts/loongarch.opt.in | 14 +++++
gcc/config/loongarch/loongarch-def.h | 7 +++
gcc/config/loongarch/loongarch-driver.cc | 2 +-
gcc/config/loongarch/loongarch-opts.cc | 12 +++-
gcc/config/loongarch/loongarch-opts.h | 3 +
gcc/config/loongarch/loongarch.cc | 45 ++++++++++----
gcc/config/loongarch/loongarch.md | 68 ++++++++++++++++++++++
gcc/config/loongarch/loongarch.opt | 14 +++++
gcc/config/loongarch/loongarch.opt.urls | 3 +
gcc/doc/invoke.texi | 16 ++++-
.../gcc.target/loongarch/cmodel-extreme-1.c | 2 +-
.../gcc.target/loongarch/cmodel-extreme-2.c | 2 +-
.../explicit-relocs-auto-extreme-tls-desc.c | 10 ++++
.../loongarch/explicit-relocs-auto-tls-desc.c | 10 ++++
.../loongarch/explicit-relocs-auto-tls-ld-gd.c | 2 +-
.../loongarch/explicit-relocs-extreme-tls-desc.c | 16 +++++
.../explicit-relocs-medium-call36-auto-tls-ld-gd.c | 2 +-
.../loongarch/explicit-relocs-tls-desc.c | 13 +++++
.../gcc.target/loongarch/func-call-medium-1.c | 2 +-
.../gcc.target/loongarch/func-call-medium-2.c | 2 +-
.../gcc.target/loongarch/func-call-medium-3.c | 2 +-
.../gcc.target/loongarch/func-call-medium-4.c | 2 +-
.../gcc.target/loongarch/tls-extreme-macro.c | 2 +-
gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c | 2 +-
25 files changed, 246 insertions(+), 26 deletions(-)
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 17873ac2103..e62f98e93f4 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -4999,7 +4999,7 @@ case "${target}" in
;;
loongarch*-*)
- supported_defaults="abi arch tune fpu simd multilib-default
strict-align-lib"
+ supported_defaults="abi arch tune fpu simd multilib-default
strict-align-lib tls"
# Local variables
unset \
@@ -5257,6 +5257,18 @@ case "${target}" in
with_multilib_list="${abi_base}/${abi_ext}"
fi
+ # Handle --with-tls.
+ case "$with_tls" in
+ "" \
+ | trad | desc)
+ # OK
+ ;;
+ *)
+ echo "Unknown TLS method used in --with-tls=$with_tls" 1>&2
+ exit 1
+ ;;
+ esac
+
# Check if the configured default ABI combination is included in
# ${with_multilib_list}.
loongarch_multilib_list_sane=no
@@ -5922,6 +5934,11 @@ case ${target} in
lasx) tm_defines="$tm_defines
DEFAULT_ISA_EXT_SIMD=ISA_EXT_SIMD_LASX" ;;
esac
+ case ${with_tls} in
+ "" | trad) tm_defines="$tm_defines
DEFAULT_TLS_TYPE=TLS_TRADITIONAL" ;;
+ desc) tm_defines="$tm_defines
DEFAULT_TLS_TYPE=TLS_DESCRIPTORS" ;;
+ esac
+
tmake_file="loongarch/t-loongarch $tmake_file"
;;
diff --git a/gcc/config/loongarch/genopts/loongarch.opt.in
b/gcc/config/loongarch/genopts/loongarch.opt.in
index a77893d31d9..50ea47a161f 100644
--- a/gcc/config/loongarch/genopts/loongarch.opt.in
+++ b/gcc/config/loongarch/genopts/loongarch.opt.in
@@ -245,6 +245,20 @@ mpass-mrelax-to-as
Driver Var(la_pass_mrelax_to_as) Init(HAVE_AS_MRELAX_OPTION)
Pass -mrelax or -mno-relax option to the assembler.
+Enum
+Name(tls_type) Type(int)
+The possible TLS dialects:
+
+EnumValue
+Enum(tls_type) String(trad) Value(TLS_TRADITIONAL)
+
+EnumValue
+Enum(tls_type) String(desc) Value(TLS_DESCRIPTORS)
+
+mtls-dialect=
+Target RejectNegative Joined Enum(tls_type) Var(la_opt_tls_dialect)
Init(M_OPT_UNSET) Save
+Specify TLS dialect.
+
-param=loongarch-vect-unroll-limit=
Target Joined UInteger Var(la_vect_unroll_limit) Init(6) IntegerRange(1, 64)
Param
Used to limit unroll factor which indicates how much the autovectorizer may
diff --git a/gcc/config/loongarch/loongarch-def.h
b/gcc/config/loongarch/loongarch-def.h
index 0cbf9476690..60ce3e230f1 100644
--- a/gcc/config/loongarch/loongarch-def.h
+++ b/gcc/config/loongarch/loongarch-def.h
@@ -180,6 +180,7 @@ struct loongarch_target
int cpu_arch; /* CPU_ */
int cpu_tune; /* same */
int cmodel; /* CMODEL_ */
+ int tls_dialect; /* TLS_ */
};
/* CPU model */
@@ -193,6 +194,12 @@ enum {
N_TUNE_TYPES = 5
};
+/* TLS types. */
+enum {
+ TLS_TRADITIONAL = 0,
+ TLS_DESCRIPTORS = 1
+};
+
/* CPU model properties */
extern loongarch_def_array<const char *, N_ARCH_TYPES>
loongarch_cpu_strings;
diff --git a/gcc/config/loongarch/loongarch-driver.cc
b/gcc/config/loongarch/loongarch-driver.cc
index 62658f531ad..8c4ed34698b 100644
--- a/gcc/config/loongarch/loongarch-driver.cc
+++ b/gcc/config/loongarch/loongarch-driver.cc
@@ -45,7 +45,7 @@ la_driver_init (int argc ATTRIBUTE_UNUSED, const char **argv
ATTRIBUTE_UNUSED)
/* Initialize all fields of la_target. */
loongarch_init_target (&la_target, M_OPT_UNSET, M_OPT_UNSET, M_OPT_UNSET,
M_OPT_UNSET, M_OPT_UNSET, M_OPT_UNSET, M_OPT_UNSET,
- 0, 0);
+ M_OPT_UNSET, 0, 0);
return "";
}
diff --git a/gcc/config/loongarch/loongarch-opts.cc
b/gcc/config/loongarch/loongarch-opts.cc
index e600f08f03b..2a6fc41b247 100644
--- a/gcc/config/loongarch/loongarch-opts.cc
+++ b/gcc/config/loongarch/loongarch-opts.cc
@@ -144,6 +144,7 @@ void
loongarch_init_target (struct loongarch_target *target,
int cpu_arch, int cpu_tune, int fpu, int simd,
int abi_base, int abi_ext, int cmodel,
+ int tls_dialect,
HOST_WIDE_INT isa_evolution,
HOST_WIDE_INT isa_evolution_set)
{
@@ -158,6 +159,7 @@ loongarch_init_target (struct loongarch_target *target,
target->abi.base = abi_base;
target->abi.ext = abi_ext;
target->cmodel = cmodel;
+ target->tls_dialect = tls_dialect;
}
@@ -179,7 +181,8 @@ loongarch_config_target (struct loongarch_target *target,
obstack_init (&msg_obstack);
struct {
- int arch, tune, fpu, simd, abi_base, abi_ext, cmodel, abi_flt;
+ int arch, tune, fpu, simd, abi_base, abi_ext, cmodel,
+ tls_dialect, abi_flt;
} constrained = {
M_OPT_ABSENT (target->cpu_arch) ? 0 : 1,
M_OPT_ABSENT (target->cpu_tune) ? 0 : 1,
@@ -188,6 +191,7 @@ loongarch_config_target (struct loongarch_target *target,
M_OPT_ABSENT (target->abi.base) ? 0 : 1,
M_OPT_ABSENT (target->abi.ext) ? 0 : 1,
M_OPT_ABSENT (target->cmodel) ? 0 : 1,
+ M_OPT_ABSENT (target->tls_dialect) ? 0 : 1,
M_OPT_ABSENT (target->abi.base) ? 0 : 1,
};
@@ -556,6 +560,9 @@ fallback:
gcc_unreachable ();
}
+ t.tls_dialect = constrained.tls_dialect ? target->tls_dialect
+ : DEFAULT_TLS_TYPE;
+
/* Cleanup and return. */
obstack_free (&msg_obstack, NULL);
*target = t;
@@ -791,6 +798,9 @@ loongarch_update_gcc_opt_status (struct loongarch_target
*target,
/* status of -mcmodel */
opts->x_la_opt_cmodel = target->cmodel;
+ /* status of -mtls-dialect */
+ opts->x_la_opt_tls_dialect = target->tls_dialect;
+
/* status of -mfpu */
opts->x_la_opt_fpu = target->isa.fpu;
diff --git a/gcc/config/loongarch/loongarch-opts.h
b/gcc/config/loongarch/loongarch-opts.h
index 2d9f59296e7..9844b27ed27 100644
--- a/gcc/config/loongarch/loongarch-opts.h
+++ b/gcc/config/loongarch/loongarch-opts.h
@@ -39,6 +39,7 @@ void
loongarch_init_target (struct loongarch_target *target,
int cpu_arch, int cpu_tune, int fpu, int simd,
int abi_base, int abi_ext, int cmodel,
+ int tls_dialect,
HOST_WIDE_INT isa_evolutions,
HOST_WIDE_INT isa_evolutions_set);
@@ -105,6 +106,8 @@ struct loongarch_flags {
#define TARGET_64BIT (la_target.isa.base == ISA_BASE_LA64)
#define TARGET_ABI_LP64 ABI_LP64_P(la_target.abi.base)
+#define TARGET_TLS_DESC (la_target.tls_dialect ==
TLS_DESCRIPTORS)
+
#define ISA_HAS_LSX \
(la_target.isa.simd == ISA_EXT_SIMD_LSX \
|| la_target.isa.simd == ISA_EXT_SIMD_LASX)
diff --git a/gcc/config/loongarch/loongarch.cc
b/gcc/config/loongarch/loongarch.cc
index a69a203fbe6..cbc91c94d9d 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -2031,7 +2031,7 @@ loongarch_symbol_insns (enum loongarch_symbol_type type,
machine_mode mode)
case SYMBOL_TLSGD:
case SYMBOL_TLSLDM:
- return 3;
+ return TARGET_TLS_DESC ? 4 : 3;
case SYMBOL_PCREL64:
return 5;
@@ -2933,24 +2933,43 @@ loongarch_call_tls_get_addr (rtx sym, enum
loongarch_symbol_type type, rtx v0)
static rtx
loongarch_legitimize_tls_address (rtx loc)
{
- rtx dest, tp, tmp, tmp1, tmp2, tmp3;
+ rtx dest, tp, tmp, tmp1, tmp2, tmp3, a0;
enum tls_model model = SYMBOL_REF_TLS_MODEL (loc);
rtx_insn *insn;
switch (model)
{
case TLS_MODEL_LOCAL_DYNAMIC:
- tmp = gen_rtx_REG (Pmode, GP_RETURN);
- dest = gen_reg_rtx (Pmode);
- insn = loongarch_call_tls_get_addr (loc, SYMBOL_TLSLDM, tmp);
- emit_libcall_block (insn, dest, tmp, loc);
- break;
-
+ if (!TARGET_TLS_DESC)
+ {
+ tmp = gen_rtx_REG (Pmode, GP_RETURN);
+ dest = gen_reg_rtx (Pmode);
+ insn = loongarch_call_tls_get_addr (loc, SYMBOL_TLSLDM, tmp);
+ emit_libcall_block (insn, dest, tmp, loc);
+ break;
+ }
+ /* Fall through. */
case TLS_MODEL_GLOBAL_DYNAMIC:
- tmp = gen_rtx_REG (Pmode, GP_RETURN);
- dest = gen_reg_rtx (Pmode);
- insn = loongarch_call_tls_get_addr (loc, SYMBOL_TLSGD, tmp);
- emit_libcall_block (insn, dest, tmp, loc);
+ if (TARGET_TLS_DESC)
+ {
+ a0 = gen_rtx_REG (Pmode, GP_ARG_FIRST);
+ dest = gen_reg_rtx (Pmode);
+ tp = gen_rtx_REG (Pmode, THREAD_POINTER_REGNUM);
+
+ if (TARGET_CMODEL_EXTREME)
+ emit_insn (gen_got_load_tls_desc_off64 (loc, gen_reg_rtx (DImode)));
+ else
+ emit_insn (gen_got_load_tls_desc (Pmode, loc));
+
+ emit_insn (gen_add3_insn (dest, a0, tp));
+ }
+ else
+ {
+ tmp = gen_rtx_REG (Pmode, GP_RETURN);
+ dest = gen_reg_rtx (Pmode);
+ insn = loongarch_call_tls_get_addr (loc, SYMBOL_TLSGD, tmp);
+ emit_libcall_block (insn, dest, tmp, loc);
+ }
break;
case TLS_MODEL_INITIAL_EXEC:
@@ -7654,6 +7673,7 @@ loongarch_option_override_internal (struct
loongarch_target *target,
opts->x_la_opt_abi_base,
opts->x_la_opt_abi_ext,
opts->x_la_opt_cmodel,
+ opts->x_la_opt_tls_dialect,
opts->x_la_isa_evolution,
opts_set->x_la_isa_evolution);
@@ -7700,6 +7720,7 @@ loongarch_option_restore (struct gcc_options *,
la_target.isa.evolution = ptr->x_la_isa_evolution;
la_target.cmodel = ptr->x_la_opt_cmodel;
+ la_target.tls_dialect = ptr->x_la_opt_tls_dialect;
}
/* Implement TARGET_CONDITIONAL_REGISTER_USAGE. */
diff --git a/gcc/config/loongarch/loongarch.md
b/gcc/config/loongarch/loongarch.md
index 18fd9c1e7d5..a316c8fb820 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -52,6 +52,8 @@
;; TLS
UNSPEC_TLS
+ UNSPEC_TLS_DESC
+ UNSPEC_TLS_DESC_OFF64
;; Stack tie
UNSPEC_TIE
@@ -127,6 +129,15 @@
(T1_REGNUM 13)
(S0_REGNUM 23)
+ (FCC0_REGNUM 64)
+ (FCC1_REGNUM 65)
+ (FCC2_REGNUM 66)
+ (FCC3_REGNUM 67)
+ (FCC4_REGNUM 68)
+ (FCC5_REGNUM 69)
+ (FCC6_REGNUM 70)
+ (FCC7_REGNUM 71)
+
;; Return path styles
(NORMAL_RETURN 0)
(SIBCALL_RETURN 1)
@@ -2759,6 +2770,63 @@
;; Thread-Local Storage
+(define_insn "@got_load_tls_desc<mode>"
+ [(set (reg:P 4)
+ (unspec:P
+ [(match_operand:P 0 "symbolic_operand" "")]
+ UNSPEC_TLS_DESC))
+ (clobber (reg:SI FCC0_REGNUM))
+ (clobber (reg:SI FCC1_REGNUM))
+ (clobber (reg:SI FCC2_REGNUM))
+ (clobber (reg:SI FCC3_REGNUM))
+ (clobber (reg:SI FCC4_REGNUM))
+ (clobber (reg:SI FCC5_REGNUM))
+ (clobber (reg:SI FCC6_REGNUM))
+ (clobber (reg:SI FCC7_REGNUM))
+ (clobber (reg:SI RETURN_ADDR_REGNUM))]
+ "TARGET_TLS_DESC"
+{
+ return TARGET_EXPLICIT_RELOCS
+ ? "pcalau12i\t$r4,%%desc_pc_hi20(%0)\n\t"
+ "addi.d\t$r4,$r4,%%desc_pc_lo12(%0)\n\t"
+ "ld.d\t$r1,$r4,%%desc_ld(%0)\n\t"
+ "jirl\t$r1,$r1,%%desc_call(%0)"
+ : "la.tls.desc\t$r4,%0";
+}
+ [(set_attr "got" "load")
+ (set_attr "mode" "<MODE>")
+ (set_attr "length" "16")])
+
+(define_insn "got_load_tls_desc_off64"
+ [(set (reg:DI 4)
+ (unspec:DI
+ [(match_operand:DI 0 "symbolic_operand" "")]
+ UNSPEC_TLS_DESC_OFF64))
+ (clobber (reg:SI FCC0_REGNUM))
+ (clobber (reg:SI FCC1_REGNUM))
+ (clobber (reg:SI FCC2_REGNUM))
+ (clobber (reg:SI FCC3_REGNUM))
+ (clobber (reg:SI FCC4_REGNUM))
+ (clobber (reg:SI FCC5_REGNUM))
+ (clobber (reg:SI FCC6_REGNUM))
+ (clobber (reg:SI FCC7_REGNUM))
+ (clobber (reg:SI RETURN_ADDR_REGNUM))
+ (clobber (match_operand:DI 1 "register_operand" "=&r"))]
+ "TARGET_TLS_DESC && TARGET_CMODEL_EXTREME"
+{
+ return TARGET_EXPLICIT_RELOCS
+ ? "pcalau12i\t$r4,%%desc_pc_hi20(%0)\n\t"
+ "addi.d\t%1,$r0,%%desc_pc_lo12(%0)\n\t"
+ "lu32i.d\t%1,%%desc64_pc_lo20(%0)\n\t"
+ "lu52i.d\t%1,%1,%%desc64_pc_hi12(%0)\n\t"
+ "add.d\t$r4,$r4,%1\n\t"
+ "ld.d\t$r1,$r4,%%desc_ld(%0)\n\t"
+ "jirl\t$r1,$r1,%%desc_call(%0)"
+ : "la.tls.desc\t$r4,%1,%0";
+}
+ [(set_attr "got" "load")
+ (set_attr "length" "28")])
+
(define_insn "@load_tls<mode>"
[(set (match_operand:P 0 "register_operand" "=r")
(unspec:P
diff --git a/gcc/config/loongarch/loongarch.opt
b/gcc/config/loongarch/loongarch.opt
index 317cd11a67c..773747f2add 100644
--- a/gcc/config/loongarch/loongarch.opt
+++ b/gcc/config/loongarch/loongarch.opt
@@ -253,6 +253,20 @@ mpass-mrelax-to-as
Driver Var(la_pass_mrelax_to_as) Init(HAVE_AS_MRELAX_OPTION)
Pass -mrelax or -mno-relax option to the assembler.
+Enum
+Name(tls_type) Type(int)
+The possible TLS dialects:
+
+EnumValue
+Enum(tls_type) String(trad) Value(TLS_TRADITIONAL)
+
+EnumValue
+Enum(tls_type) String(desc) Value(TLS_DESCRIPTORS)
+
+mtls-dialect=
+Target RejectNegative Joined Enum(tls_type) Var(la_opt_tls_dialect)
Init(M_OPT_UNSET) Save
+Specify TLS dialect.
+
-param=loongarch-vect-unroll-limit=
Target Joined UInteger Var(la_vect_unroll_limit) Init(6) IntegerRange(1, 64)
Param
Used to limit unroll factor which indicates how much the autovectorizer may
diff --git a/gcc/config/loongarch/loongarch.opt.urls
b/gcc/config/loongarch/loongarch.opt.urls
index 8e16304b66a..88f0bb0f96f 100644
--- a/gcc/config/loongarch/loongarch.opt.urls
+++ b/gcc/config/loongarch/loongarch.opt.urls
@@ -64,6 +64,9 @@
UrlSuffix(gcc/LoongArch-Options.html#index-mdirect-extern-access)
; skipping UrlSuffix for 'mrelax' due to finding no URLs
+mtls-dialect=
+UrlSuffix(gcc/LoongArch-Options.html#index-mtls-dialect-1)
+
mfrecipe
UrlSuffix(gcc/LoongArch-Options.html#index-mfrecipe)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 942103c23f5..3257563ee86 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1060,7 +1060,8 @@ Objective-C and Objective-C++ Dialects}.
-mdirect-extern-access -mno-direct-extern-access
-mcmodel=@var{code-model} -mrelax -mpass-mrelax-to-as
-mrecip -mrecip=@var{opt} -mfrecipe -mno-frecipe -mdiv32 -mno-div32
--mlam-bh -mno-lam-bh -mlamcas -mno-lamcas -mld-seq-sa -mno-ld-seq-sa}
+-mlam-bh -mno-lam-bh -mlamcas -mno-lamcas -mld-seq-sa -mno-ld-seq-sa
+-mtls-dialect=@var{opt}}
@emph{M32R/D Options}
@gccoptlist{-m32r2 -m32rx -m32r
@@ -27136,6 +27137,19 @@ Whether a load-load barrier (@code{dbar 0x700}) is
needed. When build with
@option{-march=la664}, it is enabled by default. The default is
@option{-mno-ld-seq-sa}, the load-load barrier is needed.
+@opindex mtls-dialect
+@item -mtls-dialect=@var{opt}
+This option controls which tls dialect may be used for general dynamic and
+local dynamic TLS models.
+
+@table @samp
+@item trad
+Use traditional TLS. This is the default.
+
+@item desc
+Use TLS descriptors.
+@end table
+
@item loongarch-vect-unroll-limit
The vectorizer will use available tuning information to determine whether it
would be beneficial to unroll the main vectorized loop and by how much. This
diff --git a/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-1.c
b/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-1.c
index 564ee4017f7..6269607e7df 100644
--- a/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-1.c
+++ b/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-1.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme -fno-plt
-mexplicit-relocs=always -fdump-rtl-final" } */
+/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme
-mtls-dialect=trad -fno-plt -mexplicit-relocs=always -fdump-rtl-final" } */
int a;
extern int b;
diff --git a/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-2.c
b/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-2.c
index ce834805f38..35f6ee0bb30 100644
--- a/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-2.c
+++ b/gcc/testsuite/gcc.target/loongarch/cmodel-extreme-2.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme -fno-plt
-mexplicit-relocs=auto -fdump-rtl-final" } */
+/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme
-mtls-dialect=trad -fno-plt -mexplicit-relocs=auto -fdump-rtl-final" } */
#include "cmodel-extreme-1.c"
diff --git
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-extreme-tls-desc.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-extreme-tls-desc.c
new file mode 100644
index 00000000000..0fc7a1a5117
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-extreme-tls-desc.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mcmodel=extreme -mexplicit-relocs=auto
-mtls-dialect=desc" } */
+
+__thread int a __attribute__((visibility("hidden")));
+extern __thread int b __attribute__((visibility("default")));
+
+int test() { return a + b; }
+
+/* { dg-final { scan-assembler "la\\.tls\\.desc\t\\\$r4,\\\$r12,\\.LANCHOR0" {
target tls_native } } } */
+/* { dg-final { scan-assembler "la\\.tls\\.desc\t\\\$r4,\\\$r12,\\.LANCHOR0" {
target tls_native } } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-desc.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-desc.c
new file mode 100644
index 00000000000..37947ecfdc8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-desc.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto -mtls-dialect=desc" } */
+
+__thread int a __attribute__((visibility("hidden")));
+extern __thread int b __attribute__((visibility("default")));
+
+int test() { return a + b; }
+
+/* { dg-final { scan-assembler "la\\.tls\\.desc\t\\\$r4,\\.LANCHOR0" { target
tls_native } } } */
+/* { dg-final { scan-assembler "la\\.tls\\.desc\t\\\$r4,\\.LANCHOR0" { target
tls_native } } } */
diff --git
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
index ca55fcfc53e..b47e37c822c 100644
--- a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto" } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto -mtls-dialect=trad" } */
__thread int a __attribute__((visibility("hidden")));
extern __thread int b __attribute__((visibility("default")));
diff --git
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-extreme-tls-desc.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-extreme-tls-desc.c
new file mode 100644
index 00000000000..3797556e1e6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-extreme-tls-desc.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs -mtls-dialect=desc
-mcmodel=extreme" } */
+
+__thread int a __attribute__((visibility("hidden")));
+extern __thread int b __attribute__((visibility("default")));
+
+int test() { return a + b; }
+
+/* { dg-final { scan-assembler
"pcalau12i\t\\\$r4,%desc_pc_hi20\\\(\\.LANCHOR0\\\)" { target tls_native } } }
*/
+/* { dg-final { scan-assembler
"addi.d\t\\\$r12,\\\$r0,%desc_pc_lo12\\\(\\.LANCHOR0\\\)" { target tls_native }
} } */
+/* { dg-final { scan-assembler
"lu32i.d\t\\\$r12,%desc64_pc_lo20\\\(\\.LANCHOR0\\\)" { target tls_native } } }
*/
+/* { dg-final { scan-assembler
"lu52i.d\t\\\$r12,\\\$r12,%desc64_pc_hi12\\\(\\.LANCHOR0\\\)" { target
tls_native } } } */
+/* { dg-final { scan-assembler "add.d\t\\\$r4,\\\$r4,\\\$r12" { target
tls_native } } } */
+/* { dg-final { scan-assembler
"ld.d\t\\\$r1,\\\$r4,%desc_ld\\\(\\.LANCHOR0\\\)" { target tls_native } } } */
+/* { dg-final { scan-assembler
"jirl\t\\\$r1,\\\$r1,%desc_call\\\(\\.LANCHOR0\\\)" { target tls_native } } } */
+/* { dg-final { scan-assembler "add.d\t\\\$r12,\\\$r4,\\\$r2" { target
tls_native } } } */
diff --git
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c
index d1a4820834c..cfb8553236a 100644
---
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c
+++
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto -mcmodel=medium -fplt" } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto -mtls-dialect=trad
-mcmodel=medium -fplt" } */
/* { dg-final { scan-assembler
"pcaddu18i\t\\\$r1,%call36\\\(__tls_get_addr\\\)" { target { tls_native &&
loongarch_call36_support } } } } */
#include "./explicit-relocs-auto-tls-ld-gd.c"
diff --git a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-tls-desc.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-tls-desc.c
new file mode 100644
index 00000000000..f6690309156
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-tls-desc.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs -mtls-dialect=desc" } */
+
+__thread int a __attribute__((visibility("hidden")));
+extern __thread int b __attribute__((visibility("default")));
+
+int test() { return a + b; }
+
+/* { dg-final { scan-assembler
"pcalau12i\t\\\$r4,%desc_pc_hi20\\\(\\.LANCHOR0\\\)" { target tls_native } } }
*/
+/* { dg-final { scan-assembler
"addi.d\t\\\$r4,\\\$r4,%desc_pc_lo12\\\(\\.LANCHOR0\\\)" { target tls_native }
} } */
+/* { dg-final { scan-assembler
"ld.d\t\\\$r1,\\\$r4,%desc_ld\\\(\\.LANCHOR0\\\)" { target tls_native } } } */
+/* { dg-final { scan-assembler
"jirl\t\\\$r1,\\\$r1,%desc_call\\\(\\.LANCHOR0\\\)" { target tls_native } } } */
+/* { dg-final { scan-assembler "add.d\t\\\$r12,\\\$r4,\\\$r2" { target
tls_native } } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-medium-1.c
b/gcc/testsuite/gcc.target/loongarch/func-call-medium-1.c
index 6339e832fe5..5e81df55207 100644
--- a/gcc/testsuite/gcc.target/loongarch/func-call-medium-1.c
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-medium-1.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-mabi=lp64d -O0 -fpic -fplt -mno-explicit-relocs
-mcmodel=medium" } */
+/* { dg-options "-mabi=lp64d -O0 -fpic -fplt -mno-explicit-relocs
-mtls-dialect=trad -mcmodel=medium" } */
/* { dg-final { scan-assembler "test:.*la\.global\t.*g\n\tjirl" } } */
/* { dg-final { scan-assembler "test1:.*la\.global\t.*f\n\tjirl" } } */
/* { dg-final { scan-assembler "test2:.*la\.local\t.*l\n\tjirl" } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-medium-2.c
b/gcc/testsuite/gcc.target/loongarch/func-call-medium-2.c
index a53e75e0bf9..d73df2dd8c2 100644
--- a/gcc/testsuite/gcc.target/loongarch/func-call-medium-2.c
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-medium-2.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-mabi=lp64d -O0 -fno-pic -fplt -mno-explicit-relocs
-mcmodel=medium" } */
+/* { dg-options "-mabi=lp64d -O0 -fno-pic -fplt -mno-explicit-relocs
-mtls-dialect=trad -mcmodel=medium" } */
/* { dg-final { scan-assembler "test:.*la\.global\t.*g\n\tjirl" } } */
/* { dg-final { scan-assembler "test1:.*la\.local\t.*f\n\tjirl" } } */
/* { dg-final { scan-assembler "test2:.*la\.local\t.*l\n\tjirl" } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-medium-3.c
b/gcc/testsuite/gcc.target/loongarch/func-call-medium-3.c
index 0da7bf98e3c..88a66745070 100644
--- a/gcc/testsuite/gcc.target/loongarch/func-call-medium-3.c
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-medium-3.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-mabi=lp64d -O0 -fpic -fno-plt -mno-explicit-relocs
-mcmodel=medium" } */
+/* { dg-options "-mabi=lp64d -O0 -fpic -fno-plt -mno-explicit-relocs
-mtls-dialect=trad -mcmodel=medium" } */
/* { dg-final { scan-assembler "test:.*la\.global\t.*g\n\tjirl" } } */
/* { dg-final { scan-assembler "test1:.*la\.global\t.*f\n\tjirl" } } */
/* { dg-final { scan-assembler "test2:.*la\.local\t.*l\n\tjirl" } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-medium-4.c
b/gcc/testsuite/gcc.target/loongarch/func-call-medium-4.c
index 0219688ae80..f9dc12feaf5 100644
--- a/gcc/testsuite/gcc.target/loongarch/func-call-medium-4.c
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-medium-4.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-mabi=lp64d -O0 -fno-pic -fno-plt -mno-explicit-relocs
-mcmodel=medium" } */
+/* { dg-options "-mabi=lp64d -O0 -fno-pic -fno-plt -mno-explicit-relocs
-mtls-dialect=trad -mcmodel=medium" } */
/* { dg-final { scan-assembler "test:.*la\.global\t.*g\n\tjirl" } } */
/* { dg-final { scan-assembler "test1:.*la\.local\t.*f\n\tjirl" } } */
/* { dg-final { scan-assembler "test2:.*la\.local\t.*l\n\tjirl" } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/tls-extreme-macro.c
b/gcc/testsuite/gcc.target/loongarch/tls-extreme-macro.c
index 4341f82129c..4adda4202fd 100644
--- a/gcc/testsuite/gcc.target/loongarch/tls-extreme-macro.c
+++ b/gcc/testsuite/gcc.target/loongarch/tls-extreme-macro.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme -fno-plt
-mexplicit-relocs=none" } */
+/* { dg-options "-march=loongarch64 -mabi=lp64d -O2 -mcmodel=extreme
-mtls-dialect=trad -fno-plt -mexplicit-relocs=none" } */
/* { dg-final { scan-assembler "test_le:.*la.tls.le\t\\\$r\[0-9\]+,\\\.L" {
target tls_native } } } */
/* { dg-final { scan-assembler
"test_ie:.*la.tls.ie\t\\\$r\[0-9\]+,\\\$r\[0-9\]+,\\\.L" { target tls_native }
} } */
/* { dg-final { scan-assembler
"test_ld:.*la.tls.ld\t\\\$r\[0-9\]+,\\\$r\[0-9\]+,\\\.L.*la.global\t\\\$r\[0-9\]+,\\\$r\[0-9\]+,__tls_get_addr"
{ target tls_native } } } */
diff --git a/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
b/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
index 9432c477e9d..dfa1bf53c92 100644
--- a/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
+++ b/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O0 -fno-plt -mcmodel=normal -mexplicit-relocs" } */
+/* { dg-options "-O0 -fno-plt -mcmodel=normal -mtls-dialect=trad
-mexplicit-relocs" } */
/* { dg-final { scan-assembler
"pcalau12i\t.*%got_pc_hi20\\(__tls_get_addr\\)\n\tld\.d.*%got_pc_lo12\\(__tls_get_addr\\)"
{ target tls_native } } } */
__attribute__ ((tls_model ("global-dynamic"))) __thread int a;
