Shrink wrapping in PEI:

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- reduces _static_ callee saved register spills
  and restores similar to Chow's original algorithm.
- iterative implementation with simple heuristic
  limits to mitigate compile time impact.
- handles placing spills/restores for multi-entry,
  multi-exit regions in the Machine CFG without
  splitting edges.
- passes test-suite in LLCBETA mode.

Added contains() method to ADT/SparseBitVector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71438 91177308-0d34-0410-b5e6-96231b3b80d8

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This commit is contained in:

John Mosby

2009-05-11 17:04:19 +00:00

parent 589b1efe1b

commit b9cfbd94ab

2 changed files with 1098 additions and 632 deletions

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lib/CodeGen/PrologEpilogInserter.cpp

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