Manoj Gupta 647946fa14 llvm: Add support for "-fno-delete-null-pointer-checks" ... Summary: Support for this option is needed for building Linux kernel. This is a very frequently requested feature by kernel developers. More details : https://lkml.org/lkml/2018/4/4/601 GCC option description for -fdelete-null-pointer-checks: This Assume that programs cannot safely dereference null pointers, and that no code or data element resides at address zero. -fno-delete-null-pointer-checks is the inverse of this implying that null pointer dereferencing is not undefined. This feature is implemented in LLVM IR in this CL as the function attribute "null-pointer-is-valid"="true" in IR (Under review at D47894). The CL updates several passes that assumed null pointer dereferencing is undefined to not optimize when the "null-pointer-is-valid"="true" attribute is present. Reviewers: t.p.northover, efriedma, jyknight, chandlerc, rnk, srhines, void, george.burgess.iv Reviewed By: efriedma, george.burgess.iv Subscribers: eraman, haicheng, george.burgess.iv, drinkcat, theraven, reames, sanjoy, xbolva00, llvm-commits Differential Revision: https://reviews.llvm.org/D47895 llvm-svn: 336613		2018-07-09 22:27:23 +00:00
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AliasAnalysisTest.cpp	llvm: Add support for "-fno-delete-null-pointer-checks"	2018-07-09 22:27:23 +00:00
AliasSetTrackerTest.cpp
BlockFrequencyInfoTest.cpp	Remove redundant includes from unittests.	2017-12-13 21:31:05 +00:00
BranchProbabilityInfoTest.cpp
CallGraphTest.cpp
CFGTest.cpp
CGSCCPassManagerTest.cpp
CMakeLists.txt	Add a PhiValuesAnalysis pass to calculate the underlying values of phis	2018-06-28 14:13:06 +00:00
GlobalsModRefTest.cpp
LazyCallGraphTest.cpp	[unittests] Change std::sort to llvm::sort in response to r327219	2018-04-07 01:29:45 +00:00
LoopInfoTest.cpp
MemoryBuiltinsTest.cpp
MemorySSA.cpp	llvm: Add support for "-fno-delete-null-pointer-checks"	2018-07-09 22:27:23 +00:00
OrderedBasicBlockTest.cpp
PhiValuesTest.cpp	[PhiValues] Adjust unit test to invalidate instructions before deleting them	2018-06-28 15:17:07 +00:00
ProfileSummaryInfoTest.cpp	Remove redundant includes from unittests.	2017-12-13 21:31:05 +00:00
ScalarEvolutionTest.cpp	[SCEV] Do not cache S -> V if S is not equivalent of V	2018-01-09 06:47:14 +00:00
SparsePropagation.cpp
TargetLibraryInfoTest.cpp	[SimplifyLibcalls] Replace locked IO with unlocked IO	2018-05-16 11:39:52 +00:00
TBAATest.cpp
UnrollAnalyzer.cpp
ValueLatticeTest.cpp	[ValueLattice] Return false if value range did not change in mergeIn.	2018-06-27 12:57:51 +00:00
ValueTrackingTest.cpp	Infer lowest bits of an integer Multiply when the low bits of the operands are known	2017-12-09 23:25:57 +00:00