[llvm-commits] [PATCH] Optimize printf -> iprintf if there are no floating point arguments

[Richard Osborne]

This patch adds an optimization to SimplifyLibCalls which transforms 
calls to printf into iprintf calls. iprintf is a restricted version of 
printf provided by newlib without floating-point formatting (see 
http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-February/037832.html).

This patch uses TargetLibraryInfo to determine whether iprintf is 
available. Currently it is only marked as available on the XCore target.

I intend to add similar optimizations for sprintf / fprintf once this 
patch is accepted. Please let me know if this is OK to commit.

Thanks,

Richard

-- 
Richard Osborne | XMOS
http://www.xmos.com

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