On Sun, Dec 10, 2023 at 8:57 PM Andrew Pinski <[email protected]> wrote:
>
> From: Andrew Pinski <[email protected]>
>
> The check for the type seems unnecessary and gets in the way sometimes.
> Also with a patch I am working on for match.pd, it causes a failure to happen.
> Before my patch the IR was:
> _1 = BIT_FIELD_REF <s, 8, 16>;
> _2 = _1 & 1;
> _3 = _2 != 0;
> _4 = (int) _3;
> __analyzer_eval (_4);
>
> Where _2 was an unsigned char type.
> And After my patch we have:
> _1 = BIT_FIELD_REF <s, 8, 16>;
> _2 = (int) _1;
> _3 = _2 & 1;
> __analyzer_eval (_3);
>
> But in this case, the BIT_AND_EXPR is in an int type.
>
> OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
OK (hope it's OK that I approve this).
Richard.
> gcc/analyzer/ChangeLog:
>
> * region-model-manager.cc (maybe_undo_optimize_bit_field_compare):
> Remove
> the check for type being unsigned_char_type_node.
> ---
> gcc/analyzer/region-model-manager.cc | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/gcc/analyzer/region-model-manager.cc
> b/gcc/analyzer/region-model-manager.cc
> index b631bcb04d0..26c34e38875 100644
> --- a/gcc/analyzer/region-model-manager.cc
> +++ b/gcc/analyzer/region-model-manager.cc
> @@ -596,9 +596,6 @@ maybe_undo_optimize_bit_field_compare (tree type,
> tree cst,
> const svalue *arg1)
> {
> - if (type != unsigned_char_type_node)
> - return NULL;
> -
> const binding_map &map = compound_sval->get_map ();
> unsigned HOST_WIDE_INT mask = TREE_INT_CST_LOW (cst);
> /* If "mask" is a contiguous range of set bits, see if the
> --
> 2.39.3
>
