[PATCH] tcg: Fixes set const_args[i] wrong value when instructions imm is 0

[Song Gao]

It seems that tcg_reg_alloc_op() set const_args[i] wrong value
when instructions imm is 0. The LoongArch tcg_out_vec_op() cmp_vec
use the wrong const_args[2].
e.g
   The wrong const_args[2] is 0.
   IN: vslti.w v5, v4, 0x0   OUT: vslt.w  v1, v1, v0

   The right const_args[2] is 1.
   IN: vslti.w v5, v4, 0x0   OUT: vslti.w v1, v1, 0x0

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2136
Signed-off-by: Song Gao <gaosong@loongson.cn>
---
 tcg/tcg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcg/tcg.c b/tcg/tcg.c
index e2c38f6d11..5b290123bc 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -4808,7 +4808,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp 
*op)
         arg_ct = &def->args_ct[i];
         ts = arg_temp(arg);
 
-        if (ts->val_type == TEMP_VAL_CONST
+        if ((ts->val_type == TEMP_VAL_CONST || ts->kind == TEMP_CONST)
             && tcg_target_const_match(ts->val, ts->type, arg_ct->ct, 
TCGOP_VECE(op))) {
             /* constant is OK for instruction */
             const_args[i] = 1;
-- 
2.25.1