Chris Lattner
b6b95141ec
move some select simplifications out out instcombine into
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inst simplify. No functionality change.
llvm-svn: 101873
2010-04-20 05:32:14 +00:00
Chris Lattner
9e230fb6b2
fix incorrect folding of icmp with undef, PR6481.
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llvm-svn: 97659
2010-03-03 19:46:03 +00:00
Dan Gohman
dcc3634e46
Constant-fold certain comparisons with infinity and negative infinity.
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llvm-svn: 96777
2010-02-22 04:06:03 +00:00
Chris Lattner
bdaed088ea
factor some logic out of instcombine into a new SimplifyAddInst method.
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llvm-svn: 90011
2009-11-27 17:42:22 +00:00
Chris Lattner
6611a6f733
factor some instcombine simplifications for getelementptr out to a new
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SimplifyGEPInst method in InstructionSimplify.h. No functionality change.
llvm-svn: 89980
2009-11-27 00:29:05 +00:00
Chris Lattner
ec4264fbb0
move some generally useful functions out of jump threading
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into libanalysis and transformutils.
llvm-svn: 86735
2009-11-10 22:26:15 +00:00
Chris Lattner
04da9d4b33
I misread the parens, not so redundant after all.
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llvm-svn: 86648
2009-11-10 02:04:54 +00:00
Chris Lattner
fb540241c8
remove some redundant parens.
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llvm-svn: 86645
2009-11-10 01:56:04 +00:00
Chris Lattner
a279728372
add a new SimplifyInstruction API, which is like ConstantFoldInstruction,
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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.
llvm-svn: 86637
2009-11-10 01:08:51 +00:00
Chris Lattner
3730cf6fef
factor simplification logic for AND and OR out to InstSimplify from instcombine.
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llvm-svn: 86635
2009-11-10 00:55:12 +00:00
Chris Lattner
9941f27797
pull a bunch of logic out of instcombine into instsimplify for compare
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simplification, this handles the foldable fcmp x,x cases among many others.
llvm-svn: 86627
2009-11-09 23:55:12 +00:00
Chris Lattner
25700676d4
rename SimplifyCompare -> SimplifyCmpInst and split it into
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Simplify[IF]Cmp pieces. Add some predicates to CmpInst to
determine whether a predicate is fp or int.
llvm-svn: 86624
2009-11-09 23:28:39 +00:00
Chris Lattner
131172dc76
fix ConstantFoldCompareInstOperands to take the LHS/RHS as
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individual operands instead of taking a temporary array
llvm-svn: 86619
2009-11-09 23:06:58 +00:00
Chris Lattner
126d78f1c7
stub out a new libanalysis "instruction simplify" interface that
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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.
llvm-svn: 86613
2009-11-09 22:57:59 +00:00
