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110 Commits

Author SHA1 Message Date
Nick Lewycky
668a1d0fd2 Add some more consistency checks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30305 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 19:32:53 +00:00
Nick Lewycky
977be254c6 Fix unionSets so that it can merge correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30304 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 19:24:01 +00:00
Nick Lewycky
cf2112a0a0 Erase dead instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30298 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 18:55:37 +00:00
Nick Lewycky
3fc68ccd83 Skip the linear search if the answer is already known. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30251 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-11 17:23:34 +00:00
Nick Lewycky
dc08cd56c4 Replace EquivalenceClasses with a custom-built data structure. Many common 
operations (like findProperties) should be faster, at the expense of
unionSets being slower in cases that are rare in practise.

Don't erase a dead Instruction. This fixes a memory corruption issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30235 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-10 02:27:07 +00:00
Nick Lewycky
a3a68bde21 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30055 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-02 19:40:38 +00:00
Nick Lewycky
7218c28822 Don't confuse canonicalize and lookup. Fixes predsimplify.reg4.ll. Also 
corrects missing optimization opportunity removing cases from a switch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30009 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-01 03:26:35 +00:00
Nick Lewycky
6e39c7ed1e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29991 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-31 00:39:16 +00:00
Nick Lewycky
3947a76e21 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29970 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-30 02:46:48 +00:00
Nick Lewycky
05450ae128 Add PredicateSimplifier pass. Collapses equal variables into one form 
and simplifies expressions. This implements the optimization described
in PR807.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29947 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-28 22:44:55 +00:00