tcg/optimize: Simplify fold_orc constant checks

If operand 2 is constant, then the computation of z_mask and a_mask
will produce the same results as the explicit check via fold_xi_to_i.
Shift the calls of fold_xx_to_i and fold_ix_to_not down below the
i2->is_const check.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 8d14a38f9dddd5153bdc83299522a06a91acd9dc..a48ddd91713fc043f205d43793a5f960069e9aba 100644 (file)
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2326,10 +2326,7 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
     uint64_t z_mask, o_mask, s_mask, a_mask;
     TempOptInfo *t1, *t2;
 
-    if (fold_const2(ctx, op) ||
-        fold_xx_to_i(ctx, op, -1) ||
-        fold_xi_to_x(ctx, op, -1) ||
-        fold_ix_to_not(ctx, op, 0)) {
+    if (fold_const2(ctx, op)) {
         return true;
     }
 
@@ -2352,7 +2349,10 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
         op->args[2] = arg_new_constant(ctx, ~ti_const_val(t2));
         return fold_or(ctx, op);
     }
-
+    if (fold_xx_to_i(ctx, op, -1) ||
+        fold_ix_to_not(ctx, op, 0)) {
+        return true;
+    }
     t1 = arg_info(op->args[1]);
 
     z_mask = t1->z_mask | ~t2->o_mask;