[Bug c/49016] New: always_inline causes references below the current stack pointer

["merrill_707_1 at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49016

           Summary: always_inline causes references below the current
                    stack pointer
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: merrill_707_1@yahoo.com


Created attachment 24256
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24256
A script to run to compile t.c

When "inline __attribute__((always_inline))" is used, as is set up in some
Linux 2.6 kernel builds in gcc-compiler.h / compiler.h etc., then references to
memory below the current stack pointer can be made, when optimization is turned
off.

In fact, such references can also occur with -O2, but that is not such a simple
test program to generate. Here is a test program which generates the problem
with no optimization turned on.

To compile, run the "rc" script.