[r11-3827 Regression] FAIL: g++.dg/asan/asan_test.C -O2 (test for excess errors) on Linux/x86_64

[sunil.k.pandey]

On Linux/x86_64,

83685efd5fd1623cfc4e4c435ce2773d95d458d1 is the first bad commit
commit 83685efd5fd1623cfc4e4c435ce2773d95d458d1
Author: Martin Sebor <msebor@redhat.com>
Date:   Fri Oct 9 14:48:43 2020 -0600

    Generalize compute_objsize to return maximum size/offset instead of failing (PR middle-end/97023).

caused

FAIL: gcc.dg/Wstringop-overflow-47.c  (test for warnings, line 29)
FAIL: gcc.dg/Wstringop-overflow-47.c  (test for warnings, line 32)
FAIL: gcc.dg/Wstringop-overflow-47.c  (test for warnings, line 37)
FAIL: g++.dg/asan/asan_test.C   -O2  (test for excess errors)

with GCC configured with

Configured with: ../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-3827/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=gcc.dg/Wstringop-overflow-47.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-47.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="asan.exp=g++.dg/asan/asan_test.C --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="asan.exp=g++.dg/asan/asan_test.C --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="asan.exp=g++.dg/asan/asan_test.C --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="asan.exp=g++.dg/asan/asan_test.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)