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authorLulu Cheng <chenglulu@loongson.cn>2024-01-12 17:06:30 +0800
committerLulu Cheng <chenglulu@loongson.cn>2024-01-18 15:23:15 +0800
commitd78b7bdb9ac0514b542259d0f4c6d623d09fd830 (patch)
treeb685f16c7e4212cf6be9aed07b11be98256655ae /gcc
parenta689c1f4865ea6d4c7d2a928a17894671642fa34 (diff)
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LoongArch: Assign the '/u' attribute to the mem to which the global offset table belongs.
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.
Diffstat (limited to 'gcc')
-rw-r--r--gcc/config/loongarch/loongarch.cc5
-rw-r--r--gcc/testsuite/g++.target/loongarch/got-load.C19
2 files changed, 24 insertions, 0 deletions
diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 3b8559b..8246747 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 0000000..20924c73
--- /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];
+}