Hello,
On Sat, 9 Oct 2021, apinski--- via Gcc-patches wrote:
> + (lshift (convert (convert:boolean_type_node @0)) { shift; })))
> +/* a ? -1 : 0 -> -a. No need to check the TYPE_PRECISION not being 1
> + here as the powerof2cst case above will handle that case correctly.
> */
On October 10, 2021 7:42:19 AM GMT+02:00, apinski--- via Gcc-patches
wrote:
>From: Andrew Pinski
>
>So it turns out this is kinda of a latent bug but not really latent.
>In GCC 9 and 10, phi-opt would transform a?-1:0 (even for signed 1-bit integer)
>to -(type)a but the type is an one bit
From: Andrew Pinski
So it turns out this is kinda of a latent bug but not really latent.
In GCC 9 and 10, phi-opt would transform a?-1:0 (even for signed 1-bit integer)
to -(type)a but the type is an one bit integer which means the negation is
undefined. GCC 11 fixed the problem by checking for
