[Bug tree-optimization/52081] Missed tail merging with pure calls

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52081

--- Comment #1 from vries at gcc dot gnu.org 2012-02-01 10:27:01 UTC ---
Created attachment 26540
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26540
tentative patch