https://llvm.org/bugs/show_bug.cgi?id=28322
Bug ID: 28322
Summary: [PM] Remove use of old PM in the middle-end.
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: chisophu...@gmail.com
CC: llvm-bugs@lists.llvm.org
Blocks: 28315
Classification: Unclassified
Right now, each pass/analysis we port has to keep a legacy shim which is
actually a nontrivial amount of code (although it varies from pass to pass).
Perhaps most importantly it forces awkward patterns for the core pass logic,
essentially requiring there to be 3 interfaces to be implemented:
1. the old PM interface
2. the new PM interface
3. a weird (and inconsistent across passes) meta-interface that both 1. and 2.
can be implemented in terms of.
Often, 3. takes the form of passing in the analysis objects explicitly or
passing a callback that lazily constructs them.
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