[Bug lto/56297] LTO: multiple definition error with global register variables

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56297

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-12 13:46:52 UTC ---
GCC 4.7 says

/tmp/ccQAPnYJ.o (symbol from plugin): In function `esp':
(.text+0x0): multiple definition of `esp'
/tmp/ccihIbJc.o (symbol from plugin):(.text+0x0): first defined here
In file included from foo.c:6:0,
                 from :0:
bar.c:1:14: warning: register of 'i' used for multiple global register
variables [enabled by default]
In file included from :0:0:
foo.c:1:14: note: conflicts with 'i'
collect2: error: ld returned 1 exit status

with trunk we lost that (bogus) warning.  Even when using two different
variable names.