[RFC,mainline] PR21596 df bug: global regs should have a def on entry?

Andrew MacLeod amacleod@redhat.com
Wed Mar 7 14:10:00 GMT 2007


On Wed, 2007-03-07 at 09:29 +0100, Paolo Bonzini wrote:
> Andrew MacLeod wrote:
> > I was working on a a patch for PR 21596, and it seems to have triggered
> > a bug in fwprop on x86 in mainline.

> Unfortunately, it undoes the effort of your patch, which does not
> fix the PR anymore.  I haven't seen if df-branch fixes the PR in
> other ways, nor if it already includes this bugfix.
> 

I figured as much.  The tree is slightly cleaner, but there is no
difference in code gen :-P  the same patch on 4.2 didn't make a
difference either.  It was looking into the difference that I noticed
the error. 

Andrew




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