On Linux/x86_64,

3305135c29e1c3e988bd9bad40aefc01d138aaca is the first bad commit
commit 3305135c29e1c3e988bd9bad40aefc01d138aaca
Author: Jan Hubicka <j...@suse.cz>
Date:   Tue Dec 14 16:50:27 2021 +0100

    Determine global memory accesses in ipa-modref

caused

FAIL: gfortran.dg/unlimited_polymorphic_3.f03   -Os  execution test

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-5960/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=gfortran.dg/unlimited_polymorphic_3.f03 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/unlimited_polymorphic_3.f03 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/unlimited_polymorphic_3.f03 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/unlimited_polymorphic_3.f03 
--target_board='unix{-m64\ -march=cascadelake}'"

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