diff mbox series

[v4,44/51] tcg/optimize: Use fold_xi_to_x for mul

Message ID 20211026230943.1225890-45-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 low-part multiply.

Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Philippe Mathieu-Daudé Oct. 27, 2021, 1:56 p.m. UTC | #1 
On 10/27/21 01:09, Richard Henderson wrote:
> Recognize the identity function for low-part multiply.
> 
> Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/optimize.c | 3 ++-
>  1 file changed, 2 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 low-part multiply.
> 
> Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/optimize.c | 3 ++-
>  1 file changed, 2 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 bea82305db..fe2b1eb18e 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1460,7 +1460,8 @@  static bool fold_movcond(OptContext *ctx, TCGOp *op)
 static bool fold_mul(OptContext *ctx, TCGOp *op)
 {
     if (fold_const2(ctx, op) ||
-        fold_xi_to_i(ctx, op, 0)) {
+        fold_xi_to_i(ctx, op, 0) ||
+        fold_xi_to_x(ctx, op, 1)) {
         return true;
     }
     return false;