Add fold_masks_s as a trivial wrapper around fold_masks_zs.
Avoid the use of the OptContext slots.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 0232fa852e..56043a02e0 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1091,6 +1091,11 @@ static bool fold_masks_z(OptContext *ctx, TCGOp *op, uint64_t z_mask)
     return fold_masks_zs(ctx, op, z_mask, 0);
 }
 
+static bool fold_masks_s(OptContext *ctx, TCGOp *op, uint64_t s_mask)
+{
+    return fold_masks_zs(ctx, op, -1, s_mask);
+}
+
 static bool fold_masks(OptContext *ctx, TCGOp *op)
 {
     return fold_masks_zs(ctx, op, ctx->z_mask, ctx->s_mask);
@@ -1734,15 +1739,17 @@ static bool fold_dup2(OptContext *ctx, TCGOp *op)
 
 static bool fold_eqv(OptContext *ctx, TCGOp *op)
 {
+    uint64_t s_mask;
+
     if (fold_const2_commutative(ctx, op) ||
         fold_xi_to_x(ctx, op, -1) ||
         fold_xi_to_not(ctx, op, 0)) {
         return true;
     }
 
-    ctx->s_mask = arg_info(op->args[1])->s_mask
-                & arg_info(op->args[2])->s_mask;
-    return false;
+    s_mask = arg_info(op->args[1])->s_mask
+           & arg_info(op->args[2])->s_mask;
+    return fold_masks_s(ctx, op, s_mask);
 }
 
 static bool fold_extract(OptContext *ctx, TCGOp *op)
-- 
2.43.0