On Nov 22, 2024, Alexandre Oliva <ol...@adacore.com> wrote:
> - Rework BIT_XOR handling to avoid having to match patterns again.
I goofed here, and only an -O3 profiling bootstrap of gcc-14 caught it.
Please consider this incremental patchlet as if included as part of the
previous one. Bootstrapped on top of the other on x86_64-linux-gnu.
diff --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index 731f6ccd5597e..d0caabd8a4b4d 100644
--- a/gcc/gimple-fold.cc
+++ b/gcc/gimple-fold.cc
@@ -7486,6 +7486,10 @@ decode_field_reference (tree *pexp, HOST_WIDE_INT
*pbitsize,
exp = res_ops[1];
gcc_checking_assert (!xor_cmp_op);
}
+ else if (!xor_cmp_op)
+ /* Not much we can do when xor appears in the right-hand compare
+ operand. */
+ return NULL_TREE;
else
{
*xor_p = true;
--
Alexandre Oliva, happy hacker https://FSFLA.org/blogs/lxo/
Free Software Activist GNU Toolchain Engineer
More tolerance and less prejudice are key for inclusion and diversity
Excluding neuro-others for not behaving ""normal"" is *not* inclusive
