c++/1842: when using regparm-attribute on function pointer, it affects previous function pointer too

[rat@scssoft.com]

>Number:         1842
>Category:       c++
>Synopsis:       when using regparm-attribute on function pointer, it affects previous function pointer too
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 02 13:16:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Zbynek Vyskovsky
>Release:        gcc version 2.95.3 20010125 (prerelease)
>Organization:
>Environment:
Debian Linux - sid. i386 compatible, no special environment for gcc, other information probably irrelevant
>Description:
When declaring two pointers to function, and the second one with attribute regparm(3), it affects the first pointer too (when generating the code). See assembler-output for details.
>How-To-Repeat:
Run gcc -S regparm_bug.cc and see how f1 is called. Its arguments are passed via registers, although it wasn't declared with regparm attribute.
>Fix:
There is possibility to add regparm-attribute on the end of declaration, but it makes portability (on other compilers) much more tough.
>Release-Note:
>Audit-Trail:
>Unformatted:
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