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4 Commits

Author SHA1 Message Date
Owen Anderson 2de9f545aa Add intermediate subtract instructions to reassociation worklist. 
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
 2015-11-16 18:07:30 +00:00
Chad Rosier 90a2f9b110 Revert "[Reassociate] As the expression tree is rewritten make sure the 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
 2014-11-19 23:21:20 +00:00
Chad Rosier bc0b869be9 [Reassociate] As the expression tree is rewritten make sure the operands are 
emitted in canonical form.

llvm-svn: 222142
 2014-11-17 16:33:50 +00:00
Chad Rosier 11ab941644 [Reassociation] Add support for reassociation with unsafe algebra. 
Vector instructions are (still) not supported for either integer or floating
point.  Hopefully, that work will be landed shortly.

llvm-svn: 215647
 2014-08-14 15:23:01 +00:00