[gcc r16-6789] LoongArch: Fix ICE when explicit-relocs is none

[LuluCheng]

https://gcc.gnu.org/g:a0ee159bb584855ad2db4563b6e31f88cebe055f

commit r16-6789-ga0ee159bb584855ad2db4563b6e31f88cebe055f
Author: DengJianbo <dengjianbo@loongson.cn>
Date:   Tue Jan 13 15:21:54 2026 +0800

    LoongArch: Fix ICE when explicit-relocs is none
    
    When set -mexplicit-relocs=none, the symbol address should be caclulated
    by macro instructions, for example la.local. Due to the condition
    TARGET_CMODEL_EXTREME in movdi_symbolic_off64, this template can not be
    matched in case the cmodel is normal. If the variable has attribute
    model("extreme"), gcc will get crashed with error unrecognizable insns.
    This patch fix this issue by removing TARGET_CMODEL_EXTREME, since it
    already checked in prediction symbolic_off64_or_reg_operand.
    
    gcc/ChangeLog:
    
            * config/loongarch/loongarch.md: Remove condition in template
            movdi_symbolic_off64.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/loongarch/la64/attr-model-6.c: New test.

Diff:
---
 gcc/config/loongarch/loongarch.md                      | 2 +-
 gcc/testsuite/gcc.target/loongarch/la64/attr-model-6.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index b96bedefcc4f..9dc9d6dffad1 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -2382,7 +2382,7 @@
   (unspec:DI [(const_int 0)]
     UNSPEC_LOAD_SYMBOL_OFFSET64)
   (clobber (match_operand:DI 2 "register_operand" "=&r,r"))]
- "TARGET_64BIT && TARGET_CMODEL_EXTREME"
+ "TARGET_64BIT"
 {
   if (which_alternative == 1)
     return "#";
diff --git a/gcc/testsuite/gcc.target/loongarch/la64/attr-model-6.c b/gcc/testsuite/gcc.target/loongarch/la64/attr-model-6.c
new file mode 100644
index 000000000000..9fa32a67bf41
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/la64/attr-model-6.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-mexplicit-relocs=none -mcmodel=normal -O2 -fno-pic" } */
+/* { dg-final { scan-assembler "la.local\t\\\$r\[0-9\]+,\\\$r\[0-9\]+,x" } } */
+/* { dg-final { scan-assembler "la.local\t\\\$r\[0-9\]+,y" } } */
+/* { dg-final { scan-assembler "la.local\t\\\$r\[0-9\]+,\\\$r\[0-9\]+,counter" } } */
+
+#define ATTR_MODEL_TEST
+#include "attr-model-test.c"