[PATCH] PR19137: Correct PRE handling of llvm.sadd.with.overflow followed by add.

[Erik Verbruggen]

One-week-ping!

This fixes a failing assert, which some people run into...

-- Erik.

On 17 Mar 2014, at 10:23, Erik Verbruggen <erik.verbruggen at me.com> wrote:

> When PRE finds a leader for a non-intrinsic (e.g. add), where that
> leader is an intrinsic (e.g. llvm.sadd.with.overflow), and the basic
> block for the non-intrinsic has multiple incoming edges, then do not
> insert a phi-node, because the types will be different.
> 
> The previous version only/accidentally worked for 2 incoming edges. The
> testcase is changed to test 3 edges.
> 

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