[Bug target/82811] New: Assembler error on tic6x-none-elf with march=c64x+

[g.hoogewerf at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82811

            Bug ID: 82811
           Summary: Assembler error on tic6x-none-elf with march=c64x+
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: g.hoogewerf at gmail dot com
  Target Milestone: ---

The following test case triggers an error on several versions of GCC, including
7.2.0 and 4.9.4. I tried several versions of binutils, including 2.20 and
2.26.1.

long long test(long long a, long long b)
{
    long long c = 0;

    c |= ((a & 0xFFFF) <<  0);
    c |= (b << 16);

    return c;
}

To trigger the error, the source should be compiled with: "-march=c64x+ -O2".
The error does not occur when building with "-march=c67x+".

When running with -v -save-temps, the output is:

Using built-in specs.
COLLECT_GCC=./tools/i686-pc-linux-gnu/tic6x-none-elf/bin/tic6x-none-elf-gcc
Target: tic6x-none-elf
Configured with: /home/ghoogewerf/GccBuild/src/gcc/configure
--prefix=/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=tic6x-none-elf
--enable-languages=c,c++ --disable-libssp --disable-wchar_t --disable-multilib
--with-pkgversion='Test G++ 7.2.0-p3' --disable-nls --disable-fixed-point
--disable-decimal-float --with-arch=c64x+ --disable-lto --with-newlib
--with-headers=/home/ghoogewerf/GccBuild/src/newlib/newlib/libc/include
Thread model: single
gcc version 7.2.0 (Test G++ 7.2.0-p3) 
COLLECT_GCC_OPTIONS='-c' '-O2' '-Wall' '-Wextra' '-march=c64x+' '-v'
'-save-temps'

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/libexec/gcc/tic6x-none-elf/7.2.0/cc1
-E -quiet -v pack.c -march=c64x+ -Wall -Wextra -O2 -fpch-preprocess -o pack.i
#include "..." search starts here:
#include <...> search starts here:

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/lib/gcc/tic6x-none-elf/7.2.0/include

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/lib/gcc/tic6x-none-elf/7.2.0/include-fixed

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/lib/gcc/tic6x-none-elf/7.2.0/../../../../tic6x-none-elf/sys-include

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/lib/gcc/tic6x-none-elf/7.2.0/../../../../tic6x-none-elf/include
End of search list.
COLLECT_GCC_OPTIONS='-c' '-O2' '-Wall' '-Wextra' '-march=c64x+' '-v'
'-save-temps'

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/libexec/gcc/tic6x-none-elf/7.2.0/cc1
-fpreprocessed pack.i -quiet -dumpbase pack.c -march=c64x+ -auxbase pack -O2
-Wall -Wextra -version -o pack.s
GNU C11 (Test G++ 7.2.0-p3) version 7.2.0 (tic6x-none-elf)
        compiled by GNU C version 4.9.4, GMP version 6.1.0, MPFR version 3.1.3,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Test G++ 7.2.0-p3) version 7.2.0 (tic6x-none-elf)
        compiled by GNU C version 4.9.4, GMP version 6.1.0, MPFR version 3.1.3,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: f86a3322b854da36fc325771f0c6992e
COLLECT_GCC_OPTIONS='-c' '-O2' '-Wall' '-Wextra' '-march=c64x+' '-v'
'-save-temps'

/home/ghoogewerf/GccBuild/build/tic6x-none-elf-newlib/tools/i686-pc-linux-gnu/tic6x-none-elf/lib/gcc/tic6x-none-elf/7.2.0/../../../../tic6x-none-elf/bin/as
-march=c64x+ -o pack.o pack.s
pack.s: Assembler messages:
pack.s:15: Error: operand 1 of 'pack2' on wrong side

Thanks,
G. Hoogewerf