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authorJohn Mosby <ojomojo@gmail.com>2009-05-11 17:04:19 +0000
committerJohn Mosby <ojomojo@gmail.com>2009-05-11 17:04:19 +0000
commitb9cfbd94abb23ec8646b9b10aa4ac3d1cbf4461e (patch)
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Shrink wrapping in PEI:
- 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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