Avoid the use of the OptContext slots.  Find TempOptInfo once.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 3f601e43a7..6bd73f6afa 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2490,31 +2490,25 @@ static bool fold_cmpsel_vec(OptContext *ctx, TCGOp *op)
 static bool fold_sextract(OptContext *ctx, TCGOp *op)
 {
     uint64_t z_mask, s_mask, s_mask_old;
+    TempOptInfo *t1 = arg_info(op->args[1]);
     int pos = op->args[2];
     int len = op->args[3];
 
-    if (arg_is_const(op->args[1])) {
-        uint64_t t;
-
-        t = arg_info(op->args[1])->val;
-        t = sextract64(t, pos, len);
-        return tcg_opt_gen_movi(ctx, op, op->args[0], t);
+    if (t1->is_const) {
+        return tcg_opt_gen_movi(ctx, op, op->args[0],
+                                sextract64(t1->val, pos, len));
     }
 
-    z_mask = arg_info(op->args[1])->z_mask;
-    z_mask = sextract64(z_mask, pos, len);
-    ctx->z_mask = z_mask;
-
-    s_mask_old = arg_info(op->args[1])->s_mask;
-    s_mask = sextract64(s_mask_old, pos, len);
-    s_mask |= MAKE_64BIT_MASK(len, 64 - len);
-    ctx->s_mask = s_mask;
+    s_mask_old = t1->s_mask;
+    s_mask = s_mask_old >> pos;
+    s_mask |= -1ull << (len - 1);
 
     if (0 && pos == 0 && fold_affected_mask(ctx, op, s_mask & ~s_mask_old)) {
         return true;
     }
 
-    return fold_masks(ctx, op);
+    z_mask = sextract64(t1->z_mask, pos, len);
+    return fold_masks_zs(ctx, op, z_mask, s_mask);
 }
 
 static bool fold_shift(OptContext *ctx, TCGOp *op)
-- 
2.43.0