Philip Reames b835f3446f Remove dead zero store to calloc initialized memory ... Optimize the following IR: %1 = tail call noalias i8* @calloc(i64 1, i64 4) %2 = bitcast i8* %1 to i32* ; This store is dead and should be removed store i32 0, i32* %2, align 4 Memory returned by calloc is guaranteed to be zero initialized. If the value being stored is the constant zero (and the store is not otherwise observable across threads), we can delete the store. If the store is to an out of bounds address, it is undefined and thus also removable. Reviewed By: nicholas Differential Revision: http://reviews.llvm.org/D3942 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214897 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-05 17:48:20 +00:00
..
ADCE
AddDiscriminators
ArgumentPromotion	ArgPromo+DebugInfo: Handle updating debug info over multiple applications of argument promotion.	2014-07-23 22:09:29 +00:00
AtomicExpandLoadLinked/ARM
BBVectorize
BranchFolding
CodeExtractor
CodeGenPrepare	CodeGenPrep: fall back to MVT::Other if instruction's type isn't an EVT.	2014-07-29 10:20:22 +00:00
ConstantHoisting
ConstantMerge
ConstProp
CorrelatedValuePropagation
DeadArgElim
DeadStoreElimination	Remove dead zero store to calloc initialized memory	2014-08-05 17:48:20 +00:00
DebugIR
EarlyCSE
FunctionAttrs
GCOVProfiling
GlobalDCE	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
GlobalOpt	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
GVN	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
IndVarSimplify
Inline	Convert noalias parameter attributes into noalias metadata during inlining	2014-07-25 15:50:08 +00:00
InstCombine	This patch implements transform for pattern "(A & ~B) ^ (~A) -> ~(A & B)".	2014-08-01 05:07:20 +00:00
InstMerge	MergedLoadStoreMotion pass	2014-07-18 19:13:09 +00:00
InstSimplify	InstSimplify: Simplify (X - (0 - Y)) if the second sub is NUW	2014-07-31 04:49:18 +00:00
Internalize	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
IPConstantProp
JumpThreading
LCSSA
LICM	Make Value::isDereferenceablePointer handle offsets to pointer types with dereferenceable attributes	2014-07-19 03:25:16 +00:00
LoadCombine
LoopDeletion
LoopIdiom	R600: Implement TTI:getPopcntSupport	2014-07-18 06:07:13 +00:00
LoopReroll
LoopRotate
LoopSimplify
LoopStrengthReduce
LoopUnroll	After unrolling a loop with llvm.loop.unroll.count metadata (unroll factor	2014-07-24 22:36:40 +00:00
LoopUnswitch
LoopVectorize	Add diagnostics to the vectorizer cost model.	2014-08-02 00:14:03 +00:00
LowerAtomic
LowerExpectIntrinsic
LowerInvoke
LowerSwitch
Mem2Reg
MemCpyOpt
MergeFunc	MergeFunc patch from Björn Steinbrink.	2014-07-15 10:46:51 +00:00
MetaRenamer	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
ObjCARC
PartiallyInlineLibCalls	PartiallyInlineLibCalls: Check sqrt result type before transforming it.	2014-08-01 23:21:21 +00:00
PhaseOrdering
PruneEH
Reassociate
Reg2Mem
SampleProfile
Scalarizer
ScalarRepl
SCCP
SeparateConstOffsetFromGEP/NVPTX	Partially revert r210444 due to performance regression	2014-07-16 23:25:00 +00:00
SimplifyCFG	[SimplifyCFG] fix accessing deleted PHINodes in switch-to-table conversion.	2014-08-02 23:41:54 +00:00
Sink
SLPVectorizer	Teach the SLP Vectorizer that keeping some values live over a callsite can have a cost.	2014-08-05 12:30:34 +00:00
SROA
StripSymbols
StructurizeCFG
TailCallElim	We may visit a call that uses an alloca multiple times in callUsesLocalStack, sometimes with IsNocapture true and sometimes with IsNocapture false. We accidentally skipped work we needed to do in the IsNocapture=false case if we were called with IsNocapture=true the first time. Fixes PR20405!	2014-07-23 06:24:49 +00:00
TailDup