[Bug target/96835] Constructor in offload template class

[tobias.weinzierl at durham dot ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96835

--- Comment #3 from Tobias Weinzierl <tobias.weinzierl at durham dot ac.uk> ---
The full compilation error is 

+ g++-10 -fopenmp -foffload=nvptx-none bug.cpp -o bug
ptxas /tmp/cc1XobxJ.o, line 253; error   : Illegal operand type to instruction
'ld'
ptxas /tmp/cc1XobxJ.o, line 266; error   : Label expected for argument 0 of
instruction 'call'
ptxas /tmp/cc1XobxJ.o, line 266; error   : Function '_ZN6vectorILi4EEC1ERKi'
not declared in this scope
ptxas /tmp/cc1XobxJ.o, line 266; fatal   : Call target not recognized
ptxas fatal   : Ptx assembly aborted due to errors
nvptx-as: ptxas returned 255 exit status
mkoffload: fatal error: x86_64-linux-gnu-accel-nvptx-none-gcc-10 returned 1
exit status
compilation terminated.
lto-wrapper: fatal error:
/usr/lib/gcc/x86_64-linux-gnu/10//accel/nvptx-none/mkoffload returned 1 exit
status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status

As long as the constructor is not used within the map region, the code
translates fine.