On Linux/x86_64,

99b287b8ef51a0be52f7400879a619dc5f993f31 is the first bad commit
commit 99b287b8ef51a0be52f7400879a619dc5f993f31
Author: Jan Hubicka <hubi...@ucw.cz>
Date:   Sat Oct 16 14:45:06 2021 +0200

    Fix wrong code in ldost-strlen-1.c

caused

FAIL: gfortran.dg/deferred_type_param_6.f90   -O1  execution test
FAIL: gfortran.dg/deferred_type_param_6.f90   -Os  execution test

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4457/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/deferred_type_param_6.f90 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/deferred_type_param_6.f90 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/deferred_type_param_6.f90 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/deferred_type_param_6.f90 
--target_board='unix{-m64\ -march=cascadelake}'"

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