[PATCH for-5.1] tcg: Save/restore vecop_list around minmax fallback

[PATCH for-5.1] tcg: Save/restore vecop_list around minmax fallback

[Richard Henderson]

Forgetting this asserts when tcg_gen_cmp_vec is called from
within tcg_gen_cmpsel_vec.

Fixes: 72b4c792c7a
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

I found this while testing SVE2 (and the patch is included in the
large SVE2 patch set), but it seems like it should be reproducible
with master.  What's needed is a guest vector minmax operation of
a size that is not supported by the host.  In the case of x86_64
host, that would be a 64-bit minmax.


r~

---
 tcg/tcg-op-vec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tcg/tcg-op-vec.c b/tcg/tcg-op-vec.c
index f784517d84..ed6fb55fe1 100644
--- a/tcg/tcg-op-vec.c
+++ b/tcg/tcg-op-vec.c
@@ -657,7 +657,9 @@ static void do_minmax(unsigned vece, TCGv_vec r, TCGv_vec a,
                       TCGv_vec b, TCGOpcode opc, TCGCond cond)
 {
     if (!do_op3(vece, r, a, b, opc)) {
+        const TCGOpcode *hold_list = tcg_swap_vecop_list(NULL);
         tcg_gen_cmpsel_vec(cond, vece, r, a, b, a, b);
+        tcg_swap_vecop_list(hold_list);
     }
 }
 
-- 
2.25.1