[PATCH] [SROA] Simplify PHI nodes before promoting the alloca

Jingyue Wu jingyue at google.com
Thu Jul 24 11:07:08 PDT 2014

Hi chandlerc, nlewycky, eliben, meheff,

Fixes PR20425.

Some PHI users of the alloca are trivially equivalent to the alloca, e.g.,
phi(alloca, alloca). Replace these PHI nodes with the alloca to make promotion
more effective.


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