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0ab2058852
llvm-6502/test/Transforms
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David Majnemer 0ab2058852 IR: Do not canonicalize constant GEPs into an out-of-bounds array access 
Summary:
Consider a GEP of:
i8* getelementptr ({ [2 x i8], i32, i8, [3 x i8] }* @main.c, i32 0, i32 0, i64 0)

If we proceeded to GEP the aforementioned object by 8, would form a GEP of:
i8* getelementptr ({ [2 x i8], i32, i8, [3 x i8] }* @main.c, i32 0, i32 0, i64 8)

Note that we would go through the first array member, causing an
out-of-bounds accesses.  This is problematic because we might get fooled
if we are trying to evaluate loads using this GEP, for example, based
off of an object with a constant initializer where the array is zero.

This fixes PR17732.

Reviewers: nicholas, chandlerc, void

Reviewed By: void

CC: llvm-commits, echristo, void, aemerson

Differential Revision: http://llvm-reviews.chandlerc.com/D2093

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194220 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-07 22:15:53 +00:00
..
ADCE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ArgumentPromotion [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
BBVectorize Prevent LoopVectorizer and SLPVectorizer running if the target has no vector registers. 2013-09-18 12:43:35 +00:00
BranchFolding
CodeExtractor [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
CodeGenPrepare [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ConstantMerge [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ConstProp Teach ConstantFolding about pointer address spaces 2013-08-20 21:20:04 +00:00
CorrelatedValuePropagation [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
DeadArgElim Fix a bug in Dead Argument Elimination. 2013-10-09 17:21:44 +00:00
DeadStoreElimination [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
DebugIR Use right pointer type in DebugIR 2013-09-27 22:26:25 +00:00
EarlyCSE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
FunctionAttrs [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
GCOVProfiling Debug Info Testing: update context from empty string to null. 2013-09-08 03:11:54 +00:00
GlobalDCE [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
GlobalOpt Quote potential shell expansions found in tests 2013-10-28 23:37:45 +00:00
GVN IR: Do not canonicalize constant GEPs into an out-of-bounds array access 2013-11-07 22:15:53 +00:00
IndVarSimplify Add test case for PR12377, it was fixed by r194116. 2013-11-06 11:55:41 +00:00
Inline Rename testing case to use - instead of _. 2013-11-04 18:52:06 +00:00
InstCombine Fix another constant folding address space place I missed. 2013-11-04 20:46:52 +00:00
InstSimplify Add a test that large offsets on GEPs on 32 bits targets are handled correctly. 2013-09-28 21:27:49 +00:00
Internalize Use LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN instead of the "dso list". 2013-10-31 20:51:58 +00:00
IPConstantProp [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
JumpThreading Don't eliminate a partially redundant load if it's in a landing pad. 2013-10-21 04:09:17 +00:00
LCSSA [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LICM Debug Info: In DIBuilder, the derived-from field of a DW_TAG_pointer_type 2013-10-05 01:43:03 +00:00
LoopDeletion [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopIdiom Teach loop-idiom about address space pointer sizes 2013-09-11 05:09:42 +00:00
LoopRotate Debug Info Testing: updated to use NULL instead of "i32 0" in a few fields. 2013-09-06 21:03:58 +00:00
LoopSimplify UpdatePHINodes in BasicBlockUtils should not crash on duplicate predecessors 2013-10-04 23:41:05 +00:00
LoopStrengthReduce Fix "existant" typos 2013-10-29 02:35:28 +00:00
LoopUnroll Implement TTI getUnrollingPreferences for PowerPC 2013-09-11 21:20:40 +00:00
LoopUnswitch [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LoopVectorize Scalarize select vector arguments when extracted. 2013-11-04 20:36:06 +00:00
LowerAtomic [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LowerExpectIntrinsic [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LowerInvoke [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
LowerSwitch Revert patches to add case-range support for PR1255. 2013-09-09 19:14:35 +00:00
Mem2Reg Debug Info: add an identifier field to DICompositeType. 2013-08-26 22:39:55 +00:00
MemCpyOpt [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
MergeFunc Don't merge tiny functions. 2013-10-01 18:05:30 +00:00
MetaRenamer [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ObjCARC [objc-arc] Convert the one directional retain/release relation assert to a conditional check + fail. 2013-11-05 16:02:40 +00:00
PhaseOrdering [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
PruneEH [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
Reassociate [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
Reg2Mem [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ScalarRepl Teach scalarrepl about address spaces 2013-10-30 22:54:58 +00:00
SCCP [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
SimplifyCFG SimplifyCFG: Don't duplicate calls to functions marked noduplicate v2 2013-10-21 20:07:30 +00:00
Sink [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
SLPVectorizer Add llvm/test/Transforms/SLPVectorizer/ARM/lit.local.cfg. Tests there require ARM in targets. 2013-10-29 02:46:00 +00:00
SROA SROA: Handle casts involving vectors of pointers and integer scalars. 2013-09-21 20:36:04 +00:00
StripSymbols Fix a test to not fail for users with my name. :) 2013-08-29 00:41:22 +00:00
StructurizeCFG StructurizeCFG: Add dependency on LowerSwitch pass 2013-10-02 17:04:59 +00:00
TailCallElim [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
TailDup [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00