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* [gcc r14-4925] LoongArch: Implement __builtin_thread_pointer for TLS.
@ 2023-10-25 13:11 LuluCheng
0 siblings, 0 replies; only message in thread
From: LuluCheng @ 2023-10-25 13:11 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:1b30ef7cea773e0af527dbf821e0be42b6a264f8
commit r14-4925-g1b30ef7cea773e0af527dbf821e0be42b6a264f8
Author: chenxiaolong <chenxiaolong@loongson.cn>
Date: Tue Oct 24 14:40:14 2023 +0800
LoongArch: Implement __builtin_thread_pointer for TLS.
gcc/ChangeLog:
* config/loongarch/loongarch.md (get_thread_pointer<mode>):Adds the
instruction template corresponding to the __builtin_thread_pointer
function.
* doc/extend.texi:Add the __builtin_thread_pointer function support
description to the documentation.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/builtin_thread_pointer.c: New test.
Diff:
---
gcc/config/loongarch/loongarch.md | 7 +++++++
gcc/doc/extend.texi | 5 +++++
gcc/testsuite/gcc.target/loongarch/builtin_thread_pointer.c | 10 ++++++++++
3 files changed, 22 insertions(+)
diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 134734721711..4dd716e1941d 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -113,6 +113,7 @@
(define_constants
[(RETURN_ADDR_REGNUM 1)
+ (TP_REGNUM 2)
(T0_REGNUM 12)
(T1_REGNUM 13)
(S0_REGNUM 23)
@@ -3647,6 +3648,12 @@
[(set_attr "length" "0")
(set_attr "type" "ghost")])
+;; Named pattern for expanding thread pointer reference.
+(define_expand "get_thread_pointer<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (reg:P TP_REGNUM))]
+ "HAVE_AS_TLS"
+ {})
\f
(define_split
[(match_operand 0 "small_data_pattern")]
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index bf941e6b93a1..9923a18bde98 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -16749,6 +16749,11 @@ __float128 __builtin_nanq (void);
__float128 __builtin_nansq (void);
@end smallexample
+Returns the value that is currently set in the @samp{tp} register.
+@smallexample
+ void * __builtin_thread_pointer (void)
+@end smallexample
+
@node MIPS DSP Built-in Functions
@subsection MIPS DSP Built-in Functions
diff --git a/gcc/testsuite/gcc.target/loongarch/builtin_thread_pointer.c b/gcc/testsuite/gcc.target/loongarch/builtin_thread_pointer.c
new file mode 100644
index 000000000000..541e3b143bd2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/builtin_thread_pointer.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target tls_native } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "or\t\\\$r4,\\\$r2,\\\$r0" } } */
+
+void *
+get_tp ()
+{
+ return __builtin_thread_pointer ();
+}
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