David Majnemer 2af441e26e InstCombine: mul to shl shouldn't preserve nsw ...

consider:
mul i32 nsw %x, -2147483648

this instruction will not result in poison if %x is 1

however, if we transform this into:
shl i32 nsw %x, 31

then we will be generating poison because we just shifted into the sign
bit.

This fixes PR21242.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219566 91177308-0d34-0410-b5e6-96231b3b80d8

2014-10-11 10:19:52 +00:00

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ADCE

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AddDiscriminators

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

AlignmentFromAssumptions

[AlignmentFromAssumptions] Don't crash just because the target is 32-bit

2014-09-11 08:40:17 +00:00

ArgumentPromotion

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

AtomicExpand/ARM

Use target-dependent emitLeading/TrailingFence instead of the target-independent insertLeading/TrailingFence (in AtomicExpandPass)

2014-09-03 21:01:03 +00:00

BBVectorize

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BranchFolding

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CodeExtractor

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CodeGenPrepare

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ConstantHoisting

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ConstantMerge

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ConstProp

Fix a bug around truncating vector in const prop.

2014-08-21 02:12:35 +00:00

CorrelatedValuePropagation

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DeadArgElim

DebugInfo+DeadArgElimination: Ensure llvm::Function*s from debug info are updated even when DAE removes both varargs and non-varargs arguments on the same function.

2014-10-07 15:10:23 +00:00

DeadStoreElimination

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

DebugIR

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

EarlyCSE

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FunctionAttrs

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GCOVProfiling

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

GlobalDCE

GlobalDCE: Don't drop any COMDAT members

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

GlobalOpt

GlobalOpt: Don't drop unused memberes of a Comdat

2014-10-08 07:23:31 +00:00

GVN

Relax the constraint more in MemoryDependencyAnalysis.cpp

2014-08-29 20:32:58 +00:00

IndVarSimplify

This patch teaches ScalarEvolution to pick and use !range metadata.

2014-10-10 21:22:34 +00:00

Inline

Inliner: Non-local functions in COMDATs shouldn't be dropped

2014-10-08 19:32:32 +00:00

InstCombine

InstCombine: mul to shl shouldn't preserve nsw

2014-10-11 10:19:52 +00:00

InstMerge

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InstSimplify

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

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

Internalize

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IPConstantProp

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JumpThreading

Revert r215343.

2014-10-03 09:29:24 +00:00

LCSSA

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LICM

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

LoadCombine

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LoopDeletion

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LoopIdiom

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

LoopReroll

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LoopRotate

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

LoopSimplify

FileCheckize. NFC.

2014-09-12 17:55:16 +00:00

LoopStrengthReduce

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

LoopUnroll

This patch de-pessimizes the calculation of loop trip counts in

2014-10-10 17:39:11 +00:00

LoopUnswitch

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LoopVectorize

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

LowerAtomic

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LowerExpectIntrinsic

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LowerInvoke

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LowerSwitch

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Mem2Reg

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

MemCpyOpt

Fix a really bad miscompile introduced in r216865 - the else-if logic

2014-09-01 10:09:18 +00:00

MergeFunc

Fix crash when looking up the addrspace of GEPs with vector types

2014-09-02 18:47:54 +00:00

MetaRenamer

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ObjCARC

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

PartiallyInlineLibCalls

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PhaseOrdering

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PruneEH

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Reassociate

[Reassociate] Don't canonicalize X - undef to X + (-undef).

2014-10-09 20:06:29 +00:00

Reg2Mem

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SampleProfile

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

Scalarizer

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

ScalarRepl

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

SCCP

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SeparateConstOffsetFromGEP/NVPTX

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SimplifyCFG

SimplifyCFG: Don't convert phis into selects if we could remove undef behavior

2014-10-10 01:27:02 +00:00

Sink

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SLPVectorizer

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

SROA

SROA: Don't insert instructions before a PHI

2014-09-01 21:20:14 +00:00

StripSymbols

Revert "Revert "DI: Fold constant arguments into a single MDString""

2014-10-03 20:01:09 +00:00

StructurizeCFG

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TailCallElim

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TailDup

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Util

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