[Bug target/28702] New: Profiler call clobbers lr

[schwab at suse dot de]

The code inserted by output_function_profiler clobbers the lr register, causing
the function to jump back to the beginning of the function when it returns.

        .globl hello
        .type   hello, @function
hello:
        mflr 0
        stw 0,4(1)
        bl _mcount
        stwu 1,-16(1)
        mflr 0            <-- lr already clobbered by bl
        stw 31,12(1)
        stw 0,20(1)


-- 
           Summary: Profiler call clobbers lr
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schwab at suse dot de
GCC target triplet: powerpc-*-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28702