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105 Commits

Author SHA1 Message Date
Nick Lewycky 8e5599354a Improve handling of SelectInst. 
Reorder operations to remove duplicated work.
Fix to leave floating-point types out of the optimization.
Add tests to predsimplify.ll for SwitchInst and SelectInst handling.

llvm-svn: 30055
 2006-09-02 19:40:38 +00:00
Nick Lewycky f6f529d008 Don't confuse canonicalize and lookup. Fixes predsimplify.reg4.ll. Also 
corrects missing optimization opportunity removing cases from a switch.

llvm-svn: 30009
 2006-09-01 03:26:35 +00:00
Nick Lewycky 08674ab707 Properties where both Values weren't in the union (as being equal to 
another Value) weren't being found by findProperties.

This fixes predsimplify.ll test6, a missed optimization opportunity.

llvm-svn: 29991
 2006-08-31 00:39:16 +00:00
Nick Lewycky 5f8f9af65c Move to using the EquivalenceClass ADT. Removes SynSets. 
If a branch's condition has become a ConstantBool, simplify it immediately.
Removing the edge saves work and exposes up more optimization opportunities
in the pass.
Add support for SelectInst.

llvm-svn: 29970
 2006-08-30 02:46:48 +00:00
Nick Lewycky b2e8ae1700 Add PredicateSimplifier pass. Collapses equal variables into one form 
and simplifies expressions. This implements the optimization described
in PR807.

llvm-svn: 29947
 2006-08-28 22:44:55 +00:00