[llvm-commits] [llvm] r122960 - /llvm/trunk/lib/Target/README.txt

[Benjamin Kramer]

On 06.01.2011, at 17:58, Duncan Sands wrote:

> Hi Benjamin,
> 
>> EarlyCSE does this now (and GVN always did it).
> 
> yes, but the issue with the original example (posted on the mailing list) was
> that this CSE opportunity was created by an optimization pass that ran *after*
> GVN, so wasn't caught by GVN.  Since EarlyCSE runs before GVN, it won't catch
> it either.  Unfortunately the README item didn't note this or the original C
> code, and I don't seem to have kept a copy of the original email - maybe someone
> else did.

It's still in the ml archive: http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-December/037135.html
I've added a new note with the original C code.