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* Remove -enable-lsr-nested in time for 3.1.Andrew Trick2012-03-221-83/+0
| | | | | | Tests cases have been removed but attached to open PR12330. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153286 91177308-0d34-0410-b5e6-96231b3b80d8
* LSR: rewrite inner loops only.Andrew Trick2011-09-291-1/+4
| | | | | | | | | Rewriting the entire loop nest now requires -enable-lsr-nested. See PR11035 for some performance data. A few unit tests specifically test nested LSR, and are now under a flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140762 91177308-0d34-0410-b5e6-96231b3b80d8
* FileCheck-ize, tightening checks and avoiding a temporary file.Chandler Carruth2011-07-021-6/+9
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134340 91177308-0d34-0410-b5e6-96231b3b80d8
* change selectiondag to add the sign extended versions of immediate operandsChris Lattner2009-09-081-2/+2
| | | | | | | | | to instructions instead of zero extended ones. This makes the asmprinter print signed values more consistently. This apparently only really affects the X86 backend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81265 91177308-0d34-0410-b5e6-96231b3b80d8
* Permit ChangeCompareStride to rewrite a comparison when the factorDan Gohman2009-04-271-0/+77
between the comparison's iv stride and the candidate stride is exactly -1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70244 91177308-0d34-0410-b5e6-96231b3b80d8