Florian Hahn 4271526a2f [ValueLattice] Add new state for undef constants. ... This patch adds a new undef lattice state, which is used to represent UndefValue constants or instructions producing undef. The main difference to the unknown state is that merging undef values with constants (or single element constant ranges) produces the constant/constant range, assuming all uses of the merge result will be replaced by the found constant. Contrary, merging non-single element ranges with undef needs to go to overdefined. Using unknown for UndefValues currently causes mis-compiles in CVP/LVI (PR44949) and will become problematic once we use ValueLatticeElement for SCCP. Reviewers: efriedma, reames, davide, nikic Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D75120		2020-03-14 17:19:59 +00:00
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AggressiveInstCombine	[ConstantFolding] Always return something from ConstantFoldConstant	2020-03-04 18:24:47 +01:00
CFGuard	Add missing newlines at EOF; NFC	2020-02-12 15:57:25 +00:00
Coroutines	[Coroutines] Optimized coroutine elision based on reachability	2020-03-05 14:43:50 +08:00
Hello
InstCombine	[SVE] Update API ConstantVector::getSplat() to use ElementCount.	2020-03-12 13:22:41 -07:00
Instrumentation	Reland: [Coverage] Revise format to reduce binary size	2020-02-28 18:12:04 -08:00
IPO	[Attributor] Detect possibly unbounded cycles in functions	2020-03-13 11:17:33 -05:00
ObjCARC	[ObjC][ARC] Don't remove autoreleaseRV/retainRV pairs if the call isn't	2020-03-13 13:52:14 -07:00
Scalar	[ValueLattice] Add new state for undef constants.	2020-03-14 17:19:59 +00:00
Utils	[SimplifyCFG] fix formatting; NFC	2020-03-13 14:12:28 -04:00
Vectorize	[SLPVectorizer][SVE] Bail out early for scalable vector.	2020-03-13 11:23:31 -07:00
CMakeLists.txt
LLVMBuild.txt