[Bug libgcc/63683] New: m32c-rtems ICE unable to find spill register compiling libgcc

["joel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63683

            Bug ID: 63683
           Summary: m32c-rtems ICE unable to find spill register compiling
                    libgcc
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: joel at gcc dot gnu.org

gcc 4.9 branch in git at 1d2b7cdfcb9376a6ee98964b11cf73fe14154e13
newlib head

m32c fails with ICE

Configured as follows:

 ../${GCC}/configure \
 --prefix=${PREFIX} \
 --bindir=${PREFIX}/bin \
 --exec_prefix=${PREFIX} \
 --includedir=${PREFIX}/include \
 --libdir=${PREFIX}/lib \
 --libexecdir=${PREFIX}/libexec \
 --mandir=${PREFIX}/share/man \
 --infodir=${PREFIX}/share/info \
 --datadir=${PREFIX}/share \
 --target=${TARGET} \
 --disable-sjlj-exceptions \
 --disable-libstdcxx-pch \
 --with-gnu-as --with-gnu-ld --verbose \
 --with-newlib \
 --with-system-zlib \
 --disable-nls --without-included-gettext \
 --disable-win32-registry \
 --enable-version-specific-runtime-libs \
 --disable-lto \
 --enable-newlib-io-c99-formats \
 --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 \
 --enable-threads \
 --disable-plugin \
 --enable-languages="c"

/users/joel/test-gcc/b-m32c-rtems4.11-gcc/./gcc/xgcc
-B/users/joel/test-gcc/b-m32c-rtems4.11-gcc/./gcc/ -nostdinc
-B/users/joel/test-gcc/b-m32c-rtems4.11-gcc/m32c-rtems4.11/newlib/ -isystem
/users/joel/test-gcc/b-m32c-rtems4.11-gcc/m32c-rtems4.11/newlib/targ-include
-isystem /users/joel/test-gcc/gcc/newlib/libc/include
-B/users/joel/test-gcc/install-head/m32c-rtems4.11/bin/
-B/users/joel/test-gcc/install-head/m32c-rtems4.11/lib/ -isystem
/users/joel/test-gcc/install-head/m32c-rtems4.11/include -isystem
/users/joel/test-gcc/install-head/m32c-rtems4.11/sys-include    -g -O2
-mcpu=m32cm -O2 -I../../../../gcc/libgcc/../newlib/libc/sys/rtems/include -g
-O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition  -isystem ./include   -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector -Dinhibit_libc  -I. -I. -I../../.././gcc
-I../../../../gcc/libgcc -I../../../../gcc/libgcc/.
-I../../../../gcc/libgcc/../gcc -I../../../../gcc/libgcc/../include 
-DHAVE_CC_TLS -DUSE_EMUTLS -o _ffssi2.o -MT _ffssi2.o -MD -MP -MF _ffssi2.dep
-DL_ffssi2 -c ../../../../gcc/libgcc/libgcc2.c -fvisibility=hidden
-DHIDE_EXPORTS
../../../../gcc/libgcc/libgcc2.c: In function '__ffssi2':
../../../../gcc/libgcc/libgcc2.c:522:1: error: unable to find a register to
spill in class 'A_REGS'
 }
 ^
../../../../gcc/libgcc/libgcc2.c:522:1: error: this is the insn:
(insn 62 60 63 10 (set (reg:HI 0 r0 [49])
        (zero_extend:HI (mem/u/j:QI (plus:PSI (subreg:PSI (reg:SI 45 [ D.2964
]) 0)
                    (symbol_ref:PSI ("__clz_tab") [flags 0x40] <var_decl
0x7f5d80ddcc78 __clz_tab>)) [0 __clz_tab S1 A8])))
../../../../gcc/libgcc/libgcc2.c:520 115 {zero_extendqihi2}
     (expr_list:REG_DEAD (reg:SI 45 [ D.2964 ])
        (nil)))
../../../../gcc/libgcc/libgcc2.c:522: confused by earlier errors, bailing out
make[4]: *** [_ffssi2.o] Error 1