* [PATCH] LoongArch: Assign the '/u' attribute to the mem to which the global offset table belongs.
@ 2024-01-13 6:37 Lulu Cheng
2024-01-18 7:25 ` [pushed][PATCH] " chenglulu
0 siblings, 1 reply; 2+ messages in thread
From: Lulu Cheng @ 2024-01-13 6:37 UTC (permalink / raw)
To: gcc-patches; +Cc: xry111, i, xuchenghua, Lulu Cheng
gcc/ChangeLog:
* config/loongarch/loongarch.cc (loongarch_split_symbol):
Assign the '/u' attribute to the mem.
gcc/testsuite/ChangeLog:
* g++.target/loongarch/got-load.C: New test.
---
gcc/config/loongarch/loongarch.cc | 5 +++++
gcc/testsuite/g++.target/loongarch/got-load.C | 19 +++++++++++++++++++
2 files changed, 24 insertions(+)
create mode 100644 gcc/testsuite/g++.target/loongarch/got-load.C
diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 3b8559bfdc8..82467474288 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -3202,6 +3202,11 @@ loongarch_split_symbol (rtx temp, rtx addr, machine_mode mode, rtx *low_out)
rtx mem = gen_rtx_MEM (Pmode, low);
*low_out = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, mem),
UNSPEC_LOAD_FROM_GOT);
+
+ /* Nonzero in a mem, if the memory is statically allocated and
+ read-only. A common example of the later is a shared library’s
+ global offset table. */
+ MEM_READONLY_P (mem) = 1;
}
break;
diff --git a/gcc/testsuite/g++.target/loongarch/got-load.C b/gcc/testsuite/g++.target/loongarch/got-load.C
new file mode 100644
index 00000000000..20924c73942
--- /dev/null
+++ b/gcc/testsuite/g++.target/loongarch/got-load.C
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-mabi=lp64d -O2 -mexplicit-relocs -mcmodel=normal -fdump-rtl-expand" } */
+/* { dg-final { scan-rtl-dump-times "mem/u" 2 "expand" } } */
+
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int lr[100005][2];
+
+void
+test(void)
+{
+ int n;
+
+ cin >> n;
+ for (int i = 0; i < n; ++i)
+ cin >> lr[i][0] >> lr[i][1];
+}
--
2.39.3
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [pushed][PATCH] LoongArch: Assign the '/u' attribute to the mem to which the global offset table belongs.
2024-01-13 6:37 [PATCH] LoongArch: Assign the '/u' attribute to the mem to which the global offset table belongs Lulu Cheng
@ 2024-01-18 7:25 ` chenglulu
0 siblings, 0 replies; 2+ messages in thread
From: chenglulu @ 2024-01-18 7:25 UTC (permalink / raw)
To: gcc-patches; +Cc: xry111, i, xuchenghua
Pushed to r14-8203.
在 2024/1/13 下午2:37, Lulu Cheng 写道:
> gcc/ChangeLog:
>
> * config/loongarch/loongarch.cc (loongarch_split_symbol):
> Assign the '/u' attribute to the mem.
>
> gcc/testsuite/ChangeLog:
>
> * g++.target/loongarch/got-load.C: New test.
> ---
> gcc/config/loongarch/loongarch.cc | 5 +++++
> gcc/testsuite/g++.target/loongarch/got-load.C | 19 +++++++++++++++++++
> 2 files changed, 24 insertions(+)
> create mode 100644 gcc/testsuite/g++.target/loongarch/got-load.C
>
> diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
> index 3b8559bfdc8..82467474288 100644
> --- a/gcc/config/loongarch/loongarch.cc
> +++ b/gcc/config/loongarch/loongarch.cc
> @@ -3202,6 +3202,11 @@ loongarch_split_symbol (rtx temp, rtx addr, machine_mode mode, rtx *low_out)
> rtx mem = gen_rtx_MEM (Pmode, low);
> *low_out = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, mem),
> UNSPEC_LOAD_FROM_GOT);
> +
> + /* Nonzero in a mem, if the memory is statically allocated and
> + read-only. A common example of the later is a shared library’s
> + global offset table. */
> + MEM_READONLY_P (mem) = 1;
> }
>
> break;
> diff --git a/gcc/testsuite/g++.target/loongarch/got-load.C b/gcc/testsuite/g++.target/loongarch/got-load.C
> new file mode 100644
> index 00000000000..20924c73942
> --- /dev/null
> +++ b/gcc/testsuite/g++.target/loongarch/got-load.C
> @@ -0,0 +1,19 @@
> +/* { dg-do compile } */
> +/* { dg-options "-mabi=lp64d -O2 -mexplicit-relocs -mcmodel=normal -fdump-rtl-expand" } */
> +/* { dg-final { scan-rtl-dump-times "mem/u" 2 "expand" } } */
> +
> +#include <bits/stdc++.h>
> +
> +using namespace std;
> +
> +int lr[100005][2];
> +
> +void
> +test(void)
> +{
> + int n;
> +
> + cin >> n;
> + for (int i = 0; i < n; ++i)
> + cin >> lr[i][0] >> lr[i][1];
> +}
^ permalink raw reply [flat|nested] 2+ messages in thread
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2024-01-13 6:37 [PATCH] LoongArch: Assign the '/u' attribute to the mem to which the global offset table belongs Lulu Cheng
2024-01-18 7:25 ` [pushed][PATCH] " chenglulu
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