[r12-6578 Regression] FAIL: g++.dg/cpp0x/constexpr-compare2.C -std=c++2a (test for excess errors) on Linux/x86_64

[sunil.k.pandey]

On Linux/x86_64,

d686d5d85c23451c03799dc55e456b73065f7333 is the first bad commit
commit d686d5d85c23451c03799dc55e456b73065f7333
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jan 14 12:07:49 2022 +0100

    c++: Reject in constant evaluation address comparisons of start of one var and end of another [PR89074]

caused

FAIL: g++.dg/cpp0x/constexpr-compare2.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp0x/constexpr-compare2.C  -std=c++17 (test for excess errors)
FAIL: g++.dg/cpp0x/constexpr-compare2.C  -std=c++2a (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-6578/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/cpp0x/constexpr-compare2.C --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/cpp0x/constexpr-compare2.C --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/cpp0x/constexpr-compare2.C --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/cpp0x/constexpr-compare2.C --target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me at skpgkp2 at gmail dot com)