8574aba4ea
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
852d6d64ff
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
ab799110c6
I misread the parens, not so redundant after all.
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llvm-svn: 86648
2009-11-10 02:04:54 +00:00
ee89d5a4d0
remove some redundant parens.
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llvm-svn: 86645
2009-11-10 01:56:04 +00:00
fb7f87d5a3
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
a71e9d61be
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
ccfdceb22c
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
c1f19071f8
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
cdfb80de16
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
084a1b5581
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
Chris Lattner