Anders Carlsson 77bc49e5e2 Recognize and simplify ...

(A+B) == A  ->  B == 0
A == (A+B)  ->  B == 0



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124567 91177308-0d34-0410-b5e6-96231b3b80d8

2011-01-30 22:01:13 +00:00

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ADCE

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ArgumentPromotion

fix PR8932, a case where arg promotion could infinitely promote.

2011-01-16 08:09:24 +00:00

BlockPlacement

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BranchFolding

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CodeExtractor

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CodeGenPrepare

temporarily revert r123526. While working on a follow-on patch I

2011-01-15 07:51:19 +00:00

ConstantMerge

Don't merge two constants if we care about the address of both.

2011-01-16 17:05:09 +00:00

ConstProp

Add the select optimization recently added to instcombine to constant folding.

2011-01-29 20:35:06 +00:00

CorrelatedValuePropagation

Test for lazy value info's ability to prove the absense of NULLs in pointers.

2011-01-16 21:57:20 +00:00

DeadArgElim

Teach DAE to look for functions whose arguments are unused, and change all callers to pass in an undefvalue instead.

2011-01-16 21:25:33 +00:00

DeadStoreElimination

Fix PR8728, a miscompilation I recently introduced. When optimizing

2010-12-06 01:48:06 +00:00

EarlyCSE

Duncan deftly points out that readnone functions aren't

2011-01-03 23:38:13 +00:00

FunctionAttrs

Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis

2010-11-10 01:02:18 +00:00

GlobalDCE

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GlobalOpt

Add unnamed_addr when we can show that address of a global is not used.

2011-01-19 16:32:21 +00:00

GVN

Give GVN back the ability to perform simple conditional propagation on conditional branch values.

2010-12-21 23:54:34 +00:00

IndVarSimplify

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Inline

relax testcase a bit.

2011-01-14 07:46:33 +00:00

InstCombine

Recognize and simplify

2011-01-30 22:01:13 +00:00

InstSimplify

Commit 124487 broke 254.gap. See if disabling the part that might be triggered

2011-01-30 18:24:20 +00:00

Internalize

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IPConstantProp

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JumpThreading

Re-apply r124518 with fix. Watch out for invalidated iterator.

2011-01-29 04:46:23 +00:00

LCSSA

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LICM

Enhance LICM to promote alias sets whose pointers themselves are stored,

2010-12-19 05:57:25 +00:00

LoopDeletion

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LoopIdiom

Teach loop-idiom to turn a loop containing a memset into a larger memset

2011-01-04 07:46:33 +00:00

LoopRotate

merge tests into one crash.ll test.

2011-01-11 07:50:07 +00:00

LoopSimplify

Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As described

2011-01-02 13:38:21 +00:00

LoopStrengthReduce

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LoopUnroll

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LoopUnswitch

Factor code for testing whether replacing one value with another

2010-11-18 19:59:41 +00:00

LowerAtomic

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LowerInvoke

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LowerSetJmp

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LowerSwitch

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Mem2Reg

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MemCpyOpt

Actually check memcpy lengths, instead of just commenting about

2011-01-21 22:07:57 +00:00

MergeFunc

Fix surprising missed optimization in mergefunc where we forgot to consider

2011-01-27 08:38:19 +00:00

PruneEH

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Reassociate

Fix PR9039, a use-after-free in reassociate. The issue was that the

2011-01-26 10:08:38 +00:00

ScalarRepl

merge all the "crash tests" into crash.ll

2011-01-24 03:37:34 +00:00

SCCP

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SimplifyCFG

Re-apply r124518 with fix. Watch out for invalidated iterator.

2011-01-29 04:46:23 +00:00

SimplifyLibCalls

Revert r64460. strtol and friends cannot be marked readonly, even with

2010-12-17 01:09:43 +00:00

Sink

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SRETPromotion

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StripSymbols

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TailCallElim

Add a test for TCE return duplication.

2011-01-29 04:53:35 +00:00

TailDup

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