Sanjoy Das 662c69d8c2 [ValueTracking] Teach isImpliedCondition a new bitwise trick ...

Summary:
This change teaches isImpliedCondition to prove things like

  (A | 15) < L  ==>  (A | 14) < L

if the low 4 bits of A are known to be zero.

Depends on D14391

Reviewers: majnemer, reames, hfinkel

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14392

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252673 91177308-0d34-0410-b5e6-96231b3b80d8

2015-11-10 23:56:20 +00:00

..

2010-12-20-Boolean.ll

…

2011-01-14-Thread.ll

…

2011-02-01-Vector.ll

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2011-09-05-InsertExtractValue.ll

[InstSimplify] Don't assume getAggregateElement will succeed

2015-08-18 22:07:25 +00:00

2011-10-27-BinOpCrash.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

2011-11-23-MaskedBitsCrash.ll

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2013-04-19-ConstantFoldingCrash.ll

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add-mask.ll

[ValueTracking] Recognize that and(x, add (x, -1)) clears the low bit

2015-11-10 18:46:14 +00:00

AndOrXor.ll

InstSimplify: Try to bring back the rest of r223583

2014-12-08 18:30:43 +00:00

apint-or.ll

Merge or combine tests and convert to FileCheck.

2015-09-08 18:36:56 +00:00

assume.ll

…

bswap.ll

Extend known bits to understand @llvm.bswap

2015-10-06 20:20:45 +00:00

call-callconv.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

call.ll

[InstSimplify] Handle some overflow intrinsics in InstSimplify

2015-05-22 03:56:46 +00:00

compare.ll

[InstSimplify] add nuw %x, C2 must be at least C2

2015-08-20 23:01:41 +00:00

dead-code-removal.ll

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exact-nsw-nuw.ll

InstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when C1 * C2 overflow

2014-10-11 10:20:01 +00:00

fast-math.ll

[InstSimplify] Allow folding of fdiv X, X with just NaNs ignored

2015-06-16 14:57:29 +00:00

fdiv.ll

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floating-point-arithmetic.ll

Fix really obscure bug in CannotBeNegativeZero() (PR22688)

2015-02-25 18:00:15 +00:00

floating-point-compare.ll

[InstSimplify] Fold away ord/uno fcmps when nnan is present.

2015-07-10 14:02:02 +00:00

fold-builtin-fma.ll

Revert "r216914 - Revert: [APFloat] Fixed a bug in method 'fusedMultiplyAdd'"

2014-10-14 19:23:07 +00:00

gep.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

implies.ll

[ValueTracking] Teach isImpliedCondition a new bitwise trick

2015-11-10 23:56:20 +00:00

load.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

maxmin.ll

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noalias-ptr.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

past-the-end.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

phi.ll

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ptr_diff.ll

[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction

2015-02-27 19:29:02 +00:00

reassociate.ll

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rem.ll

InstSimplify: Don't allow (x srem y) urem y -> x srem y

2014-09-17 04:16:35 +00:00

select.ll

InstSimplify: Optimize away pointless comparisons

2014-12-20 03:04:38 +00:00

shift-128-kb.ll

Handle non-constant shifts in computeKnownBits, and use computeKnownBits for constant folding in InstCombine/Simplify

2015-10-23 20:37:08 +00:00

shr-nop.ll

Fix CHECK directives that weren't checking.

2015-08-31 21:10:35 +00:00

undef.ll

[InstSimplify] Teach InstSimplify how to simplify extractelement

2015-07-13 01:15:53 +00:00

vector_gep.ll

[opaque pointer type] Add textual IR support for explicit type parameter to gep operator

2015-03-13 18:20:45 +00:00

vector_ptr_bitcast.ll

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00