Chris Lattner
d2bfe54b0a
Fix PR7647, handling the case when 'To' ends up being
...
mutated by recursive simplification. This also enhances
ReplaceAndSimplifyAllUses to actually do a real RAUW
at the end of it, which updates any value handles
pointing to "From" to start pointing to "To". This
seems useful for debug info and random other VH users.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108415 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 06:36:08 +00:00
Eli Friedman
e2f93131fb
Revert r108401; it breaks bootstrap :(
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108407 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 05:09:31 +00:00
Eli Friedman
3ed60a2a22
Add AssertingVH which makes PR7647 break consistently.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108401 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 04:46:14 +00:00
Chris Lattner
047542669a
move some select simplifications out out instcombine into
...
inst simplify. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101873 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20 05:32:14 +00:00
Chris Lattner
c8e14b3d37
fix incorrect folding of icmp with undef, PR6481.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97659 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-03 19:46:03 +00:00
Dan Gohman
6b617a7213
Constant-fold certain comparisons with infinity and negative infinity.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96777 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22 04:06:03 +00:00
Chris Lattner
8aee8efc0c
factor some logic out of instcombine into a new SimplifyAddInst method.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90011 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 17:42:22 +00:00
Chris Lattner
c514c1f521
factor some instcombine simplifications for getelementptr out to a new
...
SimplifyGEPInst method in InstructionSimplify.h. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89980 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 00:29:05 +00:00
Chris Lattner
40d8c28b27
move some generally useful functions out of jump threading
...
into libanalysis and transformutils.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86735 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 22:26:15 +00:00
Chris Lattner
70ce6d0819
I misread the parens, not so redundant after all.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86648 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 02:04:54 +00:00
Chris Lattner
9f3ce36d7e
remove some redundant parens.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86645 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 01:56:04 +00:00
Chris Lattner
e34537856a
add a new SimplifyInstruction API, which is like ConstantFoldInstruction,
...
except that the result may not be a constant. Switch jump threading to
use it so that it gets things like (X & 0) -> 0, which occur when phi preds
are deleted and the remaining phi pred was a zero.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86637 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 01:08:51 +00:00
Chris Lattner
d06094f068
factor simplification logic for AND and OR out to InstSimplify from instcombine.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86635 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 00:55:12 +00:00
Chris Lattner
210c5d4880
pull a bunch of logic out of instcombine into instsimplify for compare
...
simplification, this handles the foldable fcmp x,x cases among many others.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86627 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09 23:55:12 +00:00
Chris Lattner
9dbb42944c
rename SimplifyCompare -> SimplifyCmpInst and split it into
...
Simplify[IF]Cmp pieces. Add some predicates to CmpInst to
determine whether a predicate is fp or int.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86624 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09 23:28:39 +00:00
Chris Lattner
8f73deaa87
fix ConstantFoldCompareInstOperands to take the LHS/RHS as
...
individual operands instead of taking a temporary array
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86619 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09 23:06:58 +00:00
Chris Lattner
9f3c25aeb3
stub out a new libanalysis "instruction simplify" interface that
...
takes decimated instructions and applies identities to them. This
is pretty minimal at this point, but I plan to pull some instcombine
logic out into these and similar routines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86613 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09 22:57:59 +00:00
