[Bug debug/121964] aarch64: SVE predicate variables are printed incorrectly

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121964

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Yury Khrustalev
<ykhrustalev@gcc.gnu.org>:

https://gcc.gnu.org/g:abb54c2cbb1daeb4261e9023d929cc559eb4b901

commit r14-12209-gabb54c2cbb1daeb4261e9023d929cc559eb4b901
Author: Yury Khrustalev <yury.khrustalev@arm.com>
Date:   Wed Sep 3 12:46:33 2025 +0100

    dwarf: Save bit stride information for array type entry [PR121964]

    Lack of DW_AT_bit_stride in a DW_TAG_array_type entry causes GDB to infer
    incorrect element size for vector types. The causes incorrect display of
    SVE predicate variables as well as out of bounds memory access when reading
    contents of SVE predicates from memory in GDB.

    We also locate DIE referenced by DW_AT_type and set DW_AT_bit_size 1 in it.

    Minor tweak in target flags in tests compared to GCC-15 version.

            PR debug/121964

    gcc/
            * dwarf2out.cc (gen_array_type_die): Add DW_AT_bit_stride attribute
            for array types based on element type bit precision for integer and
            boolean element types.

    gcc/testsuite/
            * g++.target/aarch64/dwarf-bit-stride-func.C: New test.
            * g++.target/aarch64/dwarf-bit-stride-pragma.C: New test.
            * g++.target/aarch64/dwarf-bit-stride-pragma-sme.C: New test.
            * g++.target/aarch64/sve/dwarf-bit-stride.C: New test.
            * gcc.target/aarch64/dwarf-bit-stride-func.c: New test.
            * gcc.target/aarch64/dwarf-bit-stride-pragma.c: New test.
            * gcc.target/aarch64/dwarf-bit-stride-pragma-sme.c: New test.
            * gcc.target/aarch64/sve/dwarf-bit-stride.c: New test.

    (cherry picked from commit ba39d22f0b3f01195d8164649fc025653827f6b6)