https://llvm.org/bugs/show_bug.cgi?id=31518
Bug ID: 31518
Summary: refactor metadata propagation for consistency and
completeness
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Transformation Utilities
Assignee: unassignedb...@nondot.org
Reporter: spatel+l...@rotateright.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
As Davide noted in the post-commit thread for r290844:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170102/416121.html
...we have many implementations/variations for propagating metadata in
individual passes. Some of these may require different behavior, but there must
be some functionality that can be shared amongst:
GVN::patchReplacementInstruction()
GVNHoist::combineKnownMetadata()
SimplifyCFG::HoistThenElseCodeToIf()
BBVectorize::fuseChosenPairs()
VectorUtils:propagateMetadata()
We have Local.cpp -> llvm::combineMetadataForCSE(). Can it be used in these
cases?
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