[PATCH v4 45/51] tcg/optimize: Use fold_xi_to_x for div

[Richard Henderson]

Recognize the identity function for division.

Suggested-by: Luis Pires <luis.pi...@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 tcg/optimize.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index fe2b1eb18e..92684d4b1d 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1217,7 +1217,11 @@ static bool fold_deposit(OptContext *ctx, TCGOp *op)
 
 static bool fold_divide(OptContext *ctx, TCGOp *op)
 {
-    return fold_const2(ctx, op);
+    if (fold_const2(ctx, op) ||
+        fold_xi_to_x(ctx, op, 1)) {
+        return true;
+    }
+    return false;
 }
 
 static bool fold_dup(OptContext *ctx, TCGOp *op)
-- 
2.25.1