[Bug tree-optimization/30375] [4.3 Regression] tree-ssa-dse incorrectly removes struct initialization

[rguenth at gcc dot gnu dot org]

------- Comment #18 from rguenth at gcc dot gnu dot org  2007-08-22 20:23 
-------
Note alias info is correct:

  # signInfo_2 = VDEF <signInfo_1(D)>
  signInfo = {};
  # signInfo_3 = VDEF <signInfo_2>
  signInfo.a = 16;
  # signInfo_4 = VDEF <signInfo_3>
  signInfo.b = 1;
  # signInfo_5 = VDEF <signInfo_4>
  signInfo.c = 0;

but somehow DSE figures that the a/b/c inits do a def killing the initial one.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30375