[PATCH] D64150: [ValueTracking] Add MustPreserveNullness arg to functions analyzing calls. (NFC)

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: nlopes, efriedma, hfinkel, sanjoy, aqjune, jdoerfert.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

Some uses of getArgumentAliasingToReturnedPointer and
isIntrinsicReturningPointerAliasingArgumentWithoutCapturing require the
calls/intrinsics to preserve the nullness of the argument.

For alias analysis, the nullness property does not really come into
play.

This patch explicitly sets it to true. In D61669 <https://reviews.llvm.org/D61669>, the alias analysis
uses will be switched to not require preserving nullness.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D64150

Files:
  llvm/include/llvm/Analysis/ValueTracking.h
  llvm/lib/Analysis/BasicAliasAnalysis.cpp
  llvm/lib/Analysis/CaptureTracking.cpp
  llvm/lib/Analysis/Loads.cpp
  llvm/lib/Analysis/ValueTracking.cpp

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D64150.207845.patch
Type: text/x-patch
Size: 6252 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20190703/081eeb9a/attachment.bin>