[Bug fortran/87438] New: ICE building gfortran for MicroBlaze target

[me at zv dot io]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87438

            Bug ID: 87438
           Summary: ICE building gfortran for MicroBlaze target
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: me at zv dot io
  Target Milestone: ---

Created attachment 44752
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44752&action=edit
Build log with -j1 for clarity.

Attempting to build GCC 8.2.0 with the following flags for the MicroBlaze
target:

--enable-languages=c,c++,fortran --disable-libquadmath
--disable-libquadmath-support --disable-decimal-float --disable-multilib

Results in the following ICE:

mv -f .deps/bessel_r4.Tpo .deps/bessel_r4.Plo
/bin/sh ./libtool  --tag=CC   --mode=compile
/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_gcc/./gcc/xgcc
-B/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_gcc/./gcc/
-B/microblaze-linux-musl/bin/ -B/microblaze-linux-musl/lib/ -isystem
/microblaze-linux-musl/include -isystem /microblaze-linux-musl/sys-include
--sysroot=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_sysroot
-fdebug-prefix-map=/kale/musl-cross-make/build/local/microblaze-linux-musl= 
-DHAVE_CONFIG_H -I. -I../../../src_gcc/libgfortran 
-iquote../../../src_gcc/libgfortran/io -I../../../src_gcc/libgfortran/../gcc
-I../../../src_gcc/libgfortran/../gcc/config  -I../.././gcc
-I../../../src_gcc/libgfortran/../libgcc -I../libgcc
-I../../../src_gcc/libgfortran/../libbacktrace -I../libbacktrace
-I../libbacktrace  -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla  -fcx-fortran-rules
-ffunction-sections -fdata-sections   -g -O2 -MT bessel_r8.lo -MD -MP -MF
.deps/bessel_r8.Tpo -c -o bessel_r8.lo `test -f
'../../../src_gcc/libgfortran/generated/bessel_r8.c' || echo
'../../../src_gcc/libgfortran/'`../../../src_gcc/libgfortran/generated/bessel_r8.c
libtool: compile: 
/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_gcc/./gcc/xgcc
-B/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_gcc/./gcc/
-B/microblaze-linux-musl/bin/ -B/microblaze-linux-musl/lib/ -isystem
/microblaze-linux-musl/include -isystem /microblaze-linux-musl/sys-include
--sysroot=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_sysroot
-fdebug-prefix-map=/kale/musl-cross-make/build/local/microblaze-linux-musl=
-DHAVE_CONFIG_H -I. -I../../../src_gcc/libgfortran
-iquote../../../src_gcc/libgfortran/io -I../../../src_gcc/libgfortran/../gcc
-I../../../src_gcc/libgfortran/../gcc/config -I../.././gcc
-I../../../src_gcc/libgfortran/../libgcc -I../libgcc
-I../../../src_gcc/libgfortran/../libbacktrace -I../libbacktrace
-I../libbacktrace -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules
-ffunction-sections -fdata-sections -g -O2 -MT bessel_r8.lo -MD -MP -MF
.deps/bessel_r8.Tpo -c ../../../src_gcc/libgfortran/generated/bessel_r8.c 
-fPIC -DPIC -o .libs/bessel_r8.o
during RTL pass: reload
../../../src_gcc/libgfortran/generated/bessel_r8.c: In function 'bessel_yn_r8':
../../../src_gcc/libgfortran/generated/bessel_r8.c:178:1: internal compiler
error: in gen_reg_rtx, at emit-rtl.c:1155
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.

Host compiler flags:

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-foxkit-linux-musl/6.4.0/lto-wrapper
Target: x86_64-foxkit-linux-musl
Configured with: /usr/src/packages/system/gcc/src/gcc-6.4.0/configure
--prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info
--build=x86_64-foxkit-linux-musl --host=x86_64-foxkit-linux-musl
--target=x86_64-foxkit-linux-musl --with-pkgversion='Adelie 6.4.0'
--with-bugurl=http://bts.adelielinux.org/ --enable-checking=release
--disable-fixed-point --disable-libstdcxx-pch --disable-multilib
--disable-werror --disable-symvers --enable-__cxa_atexit --enable-default-pie
--enable-cloog-backend --enable-languages=c,c++,objc,java,go,fortran
--disable-libmpx --disable-libmudflap --disable-libsanitizer --enable-shared
--enable-threads --enable-tls --with-system-zlib --with-linker-hash-style=gnu
Thread model: posix
gcc version 6.4.0 (Adelie 6.4.0)

Intermediate compiler flags:

$ ./xgcc -v
Using built-in specs.
COLLECT_GCC=./xgcc
Target: microblaze-linux-musl
Configured with: ../src_gcc/configure --enable-languages=c,c++ CC='gcc -static
--static' CXX='g++ -static --static' FC='gfortran -static --static' CFLAGS='-g0
-Os' CXXFLAGS='-g0 -Os' FFLAGS='-g0 -Os' LDFLAGS='-s -static --static'
--disable-nls MAKEINFO=/bin/false
--with-debug-prefix-map=/kale/musl-cross-make/build/local/microblaze-linux-musl=
--enable-languages=c,c++,fortran --disable-libquadmath
--disable-libquadmath-support --disable-decimal-float --disable-multilib
--disable-werror --target=microblaze-linux-musl --prefix= --libdir=/lib
--disable-multilib --with-sysroot=/microblaze-linux-musl --enable-tls
--disable-libmudflap --disable-libsanitizer --disable-gnu-indirect-function
--disable-libmpx --enable-deterministic-archives --enable-libstdcxx-time
--with-build-sysroot=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_sysroot
AR_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/ar
AS_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/gas/as-new
LD_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/ld/ld-new
NM_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/nm-new
OBJCOPY_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/objcopy
OBJDUMP_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/objdump
RANLIB_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/ranlib
READELF_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/readelf
STRIP_FOR_TARGET=/kale/musl-cross-make/build/local/microblaze-linux-musl/obj_binutils/binutils/strip-new
Thread model: posix
gcc version 8.2.0 (GCC)

The full build log (-j1) is attached.