Sanjoy Das f84d001cef [IndVars] Don't break dominance in eliminateIdentitySCEV ...

Summary:
After r249211, `getSCEV(X) == getSCEV(Y)` does not guarantee that X and
Y are related in the dominator tree, even if X is an operand to Y (I've
included a toy example in comments, and a real example as a test case).

This commit changes `SimplifyIndVar` to require a `DominatorTree`.  I
don't think this is a problem because `ScalarEvolution` requires it
anyway.

Fixes PR25051.

Depends on D13459.

Reviewers: atrick, hfinkel

Subscribers: joker.eph, llvm-commits, sanjoy

Differential Revision: http://reviews.llvm.org/D13460

llvm-svn: 249471

2015-10-06 21:44:49 +00:00

..

llvm

[IndVars] Don't break dominance in eliminateIdentitySCEV

2015-10-06 21:44:49 +00:00

llvm-c

[WinEH] Add cleanupendpad instruction

2015-09-03 09:09:43 +00:00