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* Fixes PR8823: add-with-overflow-128.llAndrew Trick2010-12-231-3/+1
| | | | | | | | In the bottom-up selection DAG scheduling, handle two-address instructions that read/write unspillable registers. Treat the entire chain of two-address nodes as a single live range. llvm-svn: 122472
* temporarily disable this: PR8823.Chris Lattner2010-12-201-17/+11
| | | | llvm-svn: 122222
* Implement expansion in type legalization for add/sub with overflow. TheEli Friedman2010-06-031-0/+42
expansion is the same as that used by LegalizeDAG. The resulting code sucks in terms of performance/codesize on x86-32 for a 64-bit operation; I haven't looked into whether different expansions might be better in general. llvm-svn: 105378
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