[Bug middle-end/104721] currently_expanding_gimple_stmt isn't cleared properly

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104721

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Michael Matz from comment #2)
> Is there a testcase where you noticed this, or was it just reading code?

I am working on a patch to check currently_expanding_gimple_stmt != NULL
in i386 backend.  At -O2, currently_expanding_gimple_stmt isn't NULL outside
of gimple to RTL expansion when compiling libgomp.fortran/reduction1.f90.
I tracked it down to expand_gimple_basic_block.