https://llvm.org/bugs/show_bug.cgi?id=31759
Bug ID: 31759
Summary: Clearly define a category of opaque global attachments
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Core LLVM classes
Assignee: unassignedb...@nondot.org
Reporter: pe...@pcc.me.uk
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
We currently have two global metadata attachment types (!type and
!absolute_symbol) which are semantically significant for correctness. We should
clearly define a category of opaque global attachments (akin to metadata
attachments on instructions) and make it possible to
1. copy information from one global to another
2. drop all the opaque attachments
in a straightforward manner without breaking semantics. If that category
includes all metadata attachments, we would need to decide on some other
representation for !type and !absolute_symbol.
See also discussion on https://reviews.llvm.org/D29110
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