[Bug target/28731] New: Local variables not aligned to 4 byte boundary causes bus error due to unaligned access

[raj dot khem at gmail dot com]

The following example core dumps on target when compiled with GCC 4.1.2
prelease and also with GCC 4.1.1

int main()
{
        char k[255];
        time((long*)k);
        return 0;
}


The local variable is not tail aligned I think. This was aligned in gcc 3.4.3


Here is a diff of the two assembly files.

--- test.s      2006-08-14 21:12:59.000000000 -0700
+++ test-4.0.s  2006-08-14 21:08:30.000000000 -0700
@@ -5,16 +5,15 @@
        .type   main, #function
        .proc   04
 main:
-       !#PROLOGUE# 0
        save    %sp, -368, %sp
-       !#PROLOGUE# 1
-       add     %fp, -272, %g1
+       add     %fp, -271, %g1
        mov     %g1, %o0
        call    time, 0
         nop
        mov     0, %g1
        mov     %g1, %i0
-       ret
        restore
+       jmp     %o7+8
+        nop
        .size   main, .-main
-       .ident  "GCC: (GNU) 3.4.3 (MontaVista 3.4.3-25.0.96.0600605
2006-05-06)"
+       .ident  "GCC: (GNU) 4.1.2 20060725 (prerelease) (MontaVista 4.1.0-2)"


-- 
           Summary: Local variables not aligned to 4 byte boundary causes
                    bus error due to unaligned access
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: raj dot khem at gmail dot com
 GCC build triplet: sparc-sun-solaris2.7
  GCC host triplet: sparc-sun-solaris2.7
GCC target triplet: sparc-sun-solaris2.7


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28731