[PATCH] Do not optimise fprintf() calls if its return value is used.

[Peter Collingbourne]

On Mon, Apr 08, 2013 at 11:25:29AM -0500, Meador Inge wrote:
> On 04/03/2013 05:10 PM, Peter Collingbourne wrote:
> 
> > http://llvm-reviews.chandlerc.com/D620
> > 
> > Files:
> >   lib/Transforms/Utils/SimplifyLibCalls.cpp
> >   test/Transforms/InstCombine/fprintf-1.ll
> 
> This patch is OK.  Thanks for fixing it.

r179661.

> I know we have similar logic in place for the printf simplifiers.
> Did you audit the code to see if we have other return value use
> bugs?

No, I only fixed this one specific bug I found.  But I found it
using glibc's test suite which I hope is somewhat comprehensive.

Thanks,
-- 
Peter