[Bug c++/99062] [10 Regression] ICE in tree_to_uhwi, at tree.h:4579
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Mar 29 12:38:23 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99062
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:9d020d111fbeae228b20d75a8c832b214e561ab3
commit r10-9553-g9d020d111fbeae228b20d75a8c832b214e561ab3
Author: Marek Polacek <polacek@redhat.com>
Date: Wed Feb 10 15:24:25 2021 -0500
c-family: ICE with assume_aligned attribute [PR99062]
We ICE in handle_assume_aligned_attribute since r271338 which added
@@ -2935,8 +2936,8 @@ handle_assume_aligned_attribute (tree *node, tree
name, tree args, int,
/* The misalignment specified by the second argument
must be non-negative and less than the alignment. */
warning (OPT_Wattributes,
- "%qE attribute argument %E is not in the range [0, %E)",
- name, val, align);
+ "%qE attribute argument %E is not in the range [0,
%wu]",
+ name, val, tree_to_uhwi (align) - 1);
*no_add_attrs = true;
return NULL_TREE;
}
because align is INT_MIN and tree_to_uhwi asserts tree_fits_uhwi_p -- which
ALIGN does not and the prior tree_fits_shwi_p check is fine with it, as
well as the integer_pow2p check.
Since neither of the arguments to assume_aligned can be negative, I've
hoisted the tree_int_cst_sgn check. And add the missing "argument"
word to an existing warning.
gcc/c-family/ChangeLog:
PR c++/99062
* c-attribs.c (handle_assume_aligned_attribute): Check that the
alignment argument is non-negative. Tweak a warning message.
gcc/testsuite/ChangeLog:
PR c++/99062
* gcc.dg/attr-assume_aligned-4.c: Adjust dg-warning.
* g++.dg/ext/attr-assume-aligned.C: New test.
(cherry picked from commit 30a4d95bf76b0a0fdb66ac0211589a4434c83af3)
More information about the Gcc-bugs
mailing list