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    • Chris Lattner's avatar
      rework FoldBranchToCommonDest to exit earlier when there is a bonus · fba5cdfc
      Chris Lattner authored 
      instruction around, reducing work.

Greatly simplify handling of debug instructions.  There is no need to
build up a vector of them and then move them into the one predecessor
if we're processing a block.  Instead just rescan the block and *copy*
them into the pred.  If a block gets merged into multiple preds, this
will retain more debug info.

llvm-svn: 129502
      fba5cdfc
  29. Apr 12, 2011
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    • Eli Friedman's avatar
      PR9446: RecursivelyDeleteTriviallyDeadInstructions can delete the instruction · 17bf4922
      Eli Friedman authored 
      after the given instruction; make sure to handle that case correctly.
(It's difficult to trigger; the included testcase involves a dead 
block, but I don't think that's a requirement.) 

While I'm here, get rid of the unnecessary warning about
SimplifyInstructionsInBlock, since it should work correctly as far as I know.

llvm-svn: 128782
      17bf4922
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