[Bug target/64600] [5.0 regression] arm-rtems ICE on valid code (-mcpu=xscale)

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64600

--- Comment #9 from Joel Sherrill <joel at gcc dot gnu.org> ---
I don't build with checking enabled. 

The normal recommended configuration for an RTEMS toolchain is long since we
build newlib at the same time and have iconv options. When I do git bisect, I
usually drop the newlib and disable-multilib. But here is how it failed for me
per the top level config.log:

/users/joel/test-gcc/gcc/configure --verbose --disable-werror
--disable-libstdcxx-pch --with-gnu-as --with-gnu-ld --with-newlib
--enable-multilib --enable-newlib-mb --enable-newlib-iconv --with-system-zlib
--disable-nls --without-included-gettext --disable-win32-registry
--enable-version-specific-runtime-libs --enable-newlib-iconv
--enable-newlib-iconv-encodings=big5,cp775,cp850,cp852,cp855,cp866,euc_jp,euc_kr,euc_tw,iso_8859_1,iso_8859_10,iso_8859_11,iso_8859_13,iso_8859_14,iso_8859_15,iso_8859_2,iso_8859_3,iso_8859_4,iso_8859_5,iso_8859_6,iso_8859_7,iso_8859_8,iso_8859_9,iso_ir_111,koi8_r,koi8_ru,koi8_u,koi8_uni,ucs_2,ucs_2_internal,ucs_2be,ucs_2le,ucs_4,ucs_4_internal,ucs_4be,ucs_4le,us_ascii,utf_16,utf_16be,utf_16le,utf_8,win_1250,win_1251,win_1252,win_1253,win_1254,win_1255,win_1256,win_1257,win_1258
--disable-lto --enable-newlib-io-c99-formats --enable-threads --disable-plugin
--enable-languages=c,c++ --target=arm-rtems4.11
--prefix=/users/joel/test-gcc/install-head

I am happy to try anything you need.