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* Add intermediate subtract instructions to reassociation worklist.Owen Anderson2015-11-161-2/+2
| | | | | | | | | | We sometimes create intermediate subtract instructions during reassociation. Adding these to the worklist to revisit exposes many additional reassociation opportunities. Patch by Aditya Nandakumar. llvm-svn: 253240
* Revert "[Reassociate] As the expression tree is rewritten make sure the ↵Chad Rosier2014-11-191-6/+6
| | | | | | | | | | | | | operands are" This reverts commit r222142. This is causing/exposing an execution-time regression in spec2006/gcc and coremark on AArch64/A57/Ofast. Conflicts: test/Transforms/Reassociate/optional-flags.ll llvm-svn: 222398
* [Reassociate] As the expression tree is rewritten make sure the operands areChad Rosier2014-11-171-6/+6
| | | | | | emitted in canonical form. llvm-svn: 222142
* [Reassociate] Canonicalize constants to RHS operand.Chad Rosier2014-11-171-1/+1
| | | | | | Fix a thinko where the RHS was already a constant. llvm-svn: 222139
* [Reassociation] Add support for reassociation with unsafe algebra.Chad Rosier2014-08-141-0/+44
Vector instructions are (still) not supported for either integer or floating point. Hopefully, that work will be landed shortly. llvm-svn: 215647
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