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Author SHA1 Message Date
David Majnemer
b222184223 [LoopStrengthReduce] Don't bother fixing up PHIs from EH Pad preds 
We cannot really insert fixup code into a PHI's predecessor.

This fixes PR25445.

llvm-svn: 252416
 2015-11-08 05:04:07 +00:00
David Majnemer
235acde953 [ScalarEvolutionExpander] PHI on a catchpad can be used on both edges 
A PHI on a catchpad might be used by both edges out of the catchpad,
feeding back into a loop.  In this case, just use the insertion point.
Anything more clever would require new basic blocks or PHI placement.

llvm-svn: 251442
 2015-10-27 19:48:28 +00:00
David Majnemer
dd9a815746 [ScalarEvolutionExpander] Properly insert no-op casts + EH Pads 
We want to insert no-op casts as close as possible to the def.  This is
tricky when the cast is of a PHI node and the BasicBlocks between the
def and the use cannot hold any instructions.  Iteratively walk EH pads
until we hit a non-EH pad.

This fixes PR25326.

llvm-svn: 251393
 2015-10-27 07:36:42 +00:00