[Bug target/63360] New: Does not retore f31 at -O0 across function calls

["camm at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63360

            Bug ID: 63360
           Summary: Does not retore f31 at -O0 across function calls
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: camm at debian dot org

Created attachment 33551
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33551&action=edit
invert.c, invert.cpp, and invert.gdb gdb session

Register variable stored in f31 is stored on the stack, but not restored and
thus clobbered, after a function call.

Compiled with 

gcc -c -g  -Wall -fsigned-char -Wno-unused-but-set-variable -pipe -g -mlongcall