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Re: [tree-ssa] copy-propagation pass
- From: Jason Merrill <jason at redhat dot com>
- To: Aldy Hernandez <aldyh at redhat dot com>
- Cc: dnovillo at redhat dot com, gcc-patches at gcc dot gnu dot org
- Date: Mon, 25 Nov 2002 16:58:03 -0500
- Subject: Re: [tree-ssa] copy-propagation pass
- References: <20021125182513.GA15095@redhat.com>
On Mon, 25 Nov 2002 10:25:13 -0800, Aldy Hernandez <aldyh@redhat.com> wrote:
> In talking with Diego, we have found one big problem, which is:
>
> a = y;
> y = z;
> if (a)
> blah;
Seems like SSA should handle this.
a = y1
y2 = z;
if (a) --> if (y1)
blah;
Your problem comes from treating the two y's as one.
Jason