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456b7b602c
llvm-6502/test/Transforms
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Philip Reames 456b7b602c Loading from null is valid outside of addrspace 0 
This patches fixes a miscompile where we were assuming that loading from null is undefined and thus we could assume it doesn't happen.  This transform is perfectly legal in address space 0, but is not neccessarily legal in other address spaces.

We really should introduce a hook to control this property on a per target per address space basis.  We may be loosing valuable optimizations in some address spaces by being too conservative.

Original patch by Thomas P Raoux (submitted to llvm-commits), tests and formatting fixes by me.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224961 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-29 22:46:21 +00:00
..
ADCE
AddDiscriminators IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
AlignmentFromAssumptions
ArgumentPromotion IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
AtomicExpand/ARM
BBVectorize IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
BranchFolding
CodeExtractor
CodeGenPrepare [CodeGenPrepare][AArch64] Fix a TLI legality check on iPTR to use a lowered instead. 2014-11-12 22:16:55 +00:00
ConstantHoisting
ConstantMerge
ConstProp
CorrelatedValuePropagation LazyValueInfo: Actually re-visit partially solved block-values in solveBlockValue() 2014-11-25 17:23:05 +00:00
DeadArgElim IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
DeadStoreElimination IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
EarlyCSE Tweak EarlyCSE to recognize series of dead stores 2014-11-18 17:46:32 +00:00
FunctionAttrs
GCOVProfiling IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
GlobalDCE
GlobalOpt IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
GVN IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
IndVarSimplify Teach ScalarEvolution to exploit min and max expressions when proving 2014-12-15 22:50:15 +00:00
Inline IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
InstCombine Loading from null is valid outside of addrspace 0 2014-12-29 22:46:21 +00:00
InstMerge Added 5 more tests related to sink store revision 224247 2014-12-17 08:12:59 +00:00
InstSimplify InstSimplify: Optimize away pointless comparisons 2014-12-20 03:04:38 +00:00
Internalize
IPConstantProp
JumpThreading IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LCSSA [LCSSA] Handle PHI insertion in disjoint loops 2014-12-22 22:35:46 +00:00
LICM IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LoadCombine
LoopDeletion
LoopIdiom IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LoopReroll
LoopRotate IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LoopSimplify
LoopStrengthReduce IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LoopUnroll IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LoopUnswitch
LoopVectorize Masked Load and Store Intrinsics in loop vectorizer. 2014-12-16 11:50:42 +00:00
LowerAtomic
LowerExpectIntrinsic IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
LowerInvoke
LowerSwitch
Mem2Reg IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
MemCpyOpt
MergeFunc IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
MetaRenamer
ObjCARC IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
PartiallyInlineLibCalls
PhaseOrdering
PruneEH
Reassociate Revert "[Reassociate] As the expression tree is rewritten make sure the operands are" 2014-11-19 23:21:20 +00:00
Reg2Mem
SampleProfile IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
Scalarizer IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
ScalarRepl IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
SCCP
SeparateConstOffsetFromGEP/NVPTX
SimplifyCFG [SimplifyCFG] Revise common code sinking 2014-12-23 08:26:55 +00:00
Sink
SLPVectorizer Revert 224119 "This patch recognizes (+ (+ v0, v1) (+ v2, v3)), reorders them for bundling into vector of loads, 2014-12-17 10:34:27 +00:00
SROA SROA: The alloca type isn't a candidate promotion type for vectors 2014-11-21 02:34:55 +00:00
StripSymbols IR: Make metadata typeless in assembly 2014-12-15 19:07:53 +00:00
StructurizeCFG StructurizeCFG: Use LoopInfo analysis for better loop detection 2014-12-03 04:28:32 +00:00
TailCallElim Fix tail recursion elimination 2014-11-19 13:32:51 +00:00
TailDup
Util [SwitchLowering] Handle destinations on multiple phi instructions 2014-12-02 18:31:53 +00:00