[PATCH v1] target/loongarch: Fix qemu-loongarch64 hang when executing 'll.d $t0, $t0, 0'

[Song Gao]

On gen_ll, if a->imm is 0, The value of t0 should be src1.

Links: https://www.openwall.com/lists/musl/2024/03/12/4

Signed-off-by: Song Gao <gaos...@loongson.cn>
---
 target/loongarch/tcg/insn_trans/trans_atomic.c.inc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/target/loongarch/tcg/insn_trans/trans_atomic.c.inc 
b/target/loongarch/tcg/insn_trans/trans_atomic.c.inc
index 80c2e286fd..fab951a892 100644
--- a/target/loongarch/tcg/insn_trans/trans_atomic.c.inc
+++ b/target/loongarch/tcg/insn_trans/trans_atomic.c.inc
@@ -7,7 +7,13 @@ static bool gen_ll(DisasContext *ctx, arg_rr_i *a, MemOp mop)
 {
     TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
     TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE);
-    TCGv t0 = make_address_i(ctx, src1, a->imm);
+    TCGv t0 = tcg_temp_new();
+
+    if (a->imm) {
+        t0 = make_address_i(ctx, src1, a->imm);
+    } else {
+        tcg_gen_mov_tl(t0, src1);
+    }
 
     tcg_gen_qemu_ld_i64(dest, t0, ctx->mem_idx, mop);
     tcg_gen_st_tl(t0, tcg_env, offsetof(CPULoongArchState, lladdr));
-- 
2.25.1