The linker does not know how to relax TLS access for LoongArch, so let's
emit machine instructions with explicit relocs for TLS.
gcc/ChangeLog:
* config/loongarch/loongarch.cc (loongarch_explicit_relocs_p):
Return true for TLS symbol types if -mexplicit-relocs=auto.
(loongarch_call_tls_get_addr): Replace TARGET_EXPLICIT_RELOCS
with la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE.
(loongarch_legitimize_tls_address): Likewise.
* config/loongarch/loongarch.md (@tls_low<mode>): Remove
TARGET_EXPLICIT_RELOCS from insn condition.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c: New
test.
* gcc.target/loongarch/explicit-relocs-auto-tls-le-ie.c: New
test.
---
gcc/config/loongarch/loongarch.cc | 37 ++++++++++++-------
gcc/config/loongarch/loongarch.md | 2 +-
.../explicit-relocs-auto-tls-ld-gd.c | 9 +++++
.../explicit-relocs-auto-tls-le-ie.c | 6 +++
4 files changed, 40 insertions(+), 14 deletions(-)
create mode 100644
gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
create mode 100644
gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-le-ie.c
diff --git a/gcc/config/loongarch/loongarch.cc
b/gcc/config/loongarch/loongarch.cc
index c12d77ea144..c782f571abc 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -1936,16 +1936,27 @@ loongarch_explicit_relocs_p (enum loongarch_symbol_type
type)
if (la_opt_explicit_relocs != EXPLICIT_RELOCS_AUTO)
return la_opt_explicit_relocs == EXPLICIT_RELOCS_ALWAYS;
- /* If we are performing LTO for a final link, and we have the linker
- plugin so we know the resolution of the symbols, then all GOT
- references are binding to external symbols or preemptable symbols.
- So the linker cannot relax them. */
- return (in_lto_p
- && !flag_incremental_link
- && HAVE_LTO_PLUGIN == 2
- && (!global_options_set.x_flag_use_linker_plugin
- || global_options.x_flag_use_linker_plugin)
- && type == SYMBOL_GOT_DISP);
+ switch (type)
+ {
+ case SYMBOL_TLS_IE:
+ case SYMBOL_TLS_LE:
+ case SYMBOL_TLSGD:
+ case SYMBOL_TLSLDM:
+ /* The linker don't know how to relax TLS accesses. */
+ return true;
+ case SYMBOL_GOT_DISP:
+ /* If we are performing LTO for a final link, and we have the
+ linker plugin so we know the resolution of the symbols, then
+ all GOT references are binding to external symbols or
+ preemptable symbols. So the linker cannot relax them. */
+ return (in_lto_p
+ && !flag_incremental_link
+ && HAVE_LTO_PLUGIN == 2
+ && (!global_options_set.x_flag_use_linker_plugin
+ || global_options.x_flag_use_linker_plugin));
+ default:
+ return false;
+ }
}
/* Returns the number of instructions necessary to reference a symbol. */
@@ -2753,7 +2764,7 @@ loongarch_call_tls_get_addr (rtx sym, enum
loongarch_symbol_type type, rtx v0)
start_sequence ();
- if (TARGET_EXPLICIT_RELOCS)
+ if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
{
/* Split tls symbol to high and low. */
rtx high = gen_rtx_HIGH (Pmode, copy_rtx (loc));
@@ -2918,7 +2929,7 @@ loongarch_legitimize_tls_address (rtx loc)
tp = gen_rtx_REG (Pmode, THREAD_POINTER_REGNUM);
tmp1 = gen_reg_rtx (Pmode);
dest = gen_reg_rtx (Pmode);
- if (TARGET_EXPLICIT_RELOCS)
+ if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
{
tmp2 = loongarch_unspec_address (loc, SYMBOL_TLS_IE);
tmp3 = gen_reg_rtx (Pmode);
@@ -2955,7 +2966,7 @@ loongarch_legitimize_tls_address (rtx loc)
tmp1 = gen_reg_rtx (Pmode);
dest = gen_reg_rtx (Pmode);
- if (TARGET_EXPLICIT_RELOCS)
+ if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
{
tmp2 = loongarch_unspec_address (loc, SYMBOL_TLS_LE);
tmp3 = gen_reg_rtx (Pmode);
diff --git a/gcc/config/loongarch/loongarch.md
b/gcc/config/loongarch/loongarch.md
index bec73f1bc91..695c8eb9a6f 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -2257,7 +2257,7 @@ (define_insn "@tls_low<mode>"
(unspec:P [(mem:P (lo_sum:P (match_operand:P 1 "register_operand" "r")
(match_operand:P 2 "symbolic_operand" "")))]
UNSPEC_TLS_LOW))]
- "TARGET_EXPLICIT_RELOCS"
+ ""
"addi.<d>\t%0,%1,%L2"
[(set_attr "type" "arith")
(set_attr "mode" "<MODE>")])
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
new file mode 100644
index 00000000000..957ff98df62
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto" } */
+
+__thread int a __attribute__((visibility("hidden")));
+extern __thread int b __attribute__((visibility("default")));
+
+int test() { return a + b; }
+
+/* { dg-final { scan-assembler-not "la.tls" { target tls_native } } } */
diff --git
a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-le-ie.c
b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-le-ie.c
new file mode 100644
index 00000000000..78898cfc6ab
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-le-ie.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mexplicit-relocs=auto" } */
+
+#include "explicit-relocs-auto-tls-ld-gd.c"
+
+/* { dg-final { scan-assembler-not "la.tls" { target tls_native } } } */
--
2.42.0
