[r11-2928 Regression] FAIL: gcc.dg/Wstringop-overread.c (test for warnings, line 84) on Linux/x86_64 (-m32 -march=cascadelake)

[sunil.k.pandey]

On Linux/x86_64,

d14c547abd484d3540b692bb8048c4a6efe92c8b is the first bad commit
commit d14c547abd484d3540b692bb8048c4a6efe92c8b
Author: Martin Sebor <msebor@redhat.com>
Date:   Fri Aug 28 13:13:28 2020 -0600

    Add -Wstringop-overread for reading past the end by string functions.

caused

FAIL: gcc.dg/Wstringop-overread.c (test for excess errors)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 100)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 110)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 167)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 177)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 279)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 289)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 338)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 372)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 374)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 532)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 566)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 568)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 74)
FAIL: gcc.dg/Wstringop-overread.c  (test for warnings, line 84)

with GCC configured with

../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-2928/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-overread.c --target_board='unix{-m32\ -march=cascadelake}'"

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