diff mbox series

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

Message ID 20211026230943.1225890-46-richard.henderson@linaro.org
State New
Headers show
Series tcg: optimize redundant sign extensions | expand

Commit Message

Richard Henderson Oct. 26, 2021, 11:09 p.m. UTC 
Recognize the identity function for division.

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

Comments

Philippe Mathieu-Daudé Oct. 27, 2021, 1:51 p.m. UTC | #1 
On 10/27/21 01:09, Richard Henderson wrote:
> Recognize the identity function for division.
> 
> Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/optimize.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Luis Fernando Fujita Pires Oct. 27, 2021, 8:37 p.m. UTC | #2 
From: Richard Henderson <richard.henderson@linaro.org>
> Recognize the identity function for division.
> 
> Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/optimize.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>

--
Luis Pires
Instituto de Pesquisas ELDORADO
Aviso Legal - Disclaimer <https://www.eldorado.org.br/disclaimer.html>
diff mbox series

Patch

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)