[Bug target/60822] Index register overwritten on m68k/coldfire

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60822

--- Comment #3 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Started with r140275:

2008-09-11  Andreas Schwab  <schwab@suse.de>

       * config/m68k/m68k.h (IRA_COVER_CLASSES): Define.

which seems to enable IRA for M68K.  The code generation difference for the C
test case at this revision is:

--- pr60822-r140274.s   2014-04-12 20:50:32.324607341 +0200
+++ pr60822-r140275.s   2014-04-12 20:46:21.835089754 +0200
@@ -9,10 +9,10 @@
        link.w %fp,#0
        move.l %d2,-(%sp)
        move.l 8(%fp),%a0
-       move.l #800000,%d1
-       move.l #1700004,%d0
-       move.l (%a0,%d1.l),%d1
-       add.l (%a0,%d0.l),%d1
+       move.l #800000,%d0
+       move.l #1700004,%d1
+       move.l (%a0,%d0.l),%d1
+       add.l (%a0,%d1.l),%d1
        smi %d0
        ext.w %d0
        ext.l %d0

I assume this revision merely exposed a pre-existing latent problem.