http://llvm.org/bugs/show_bug.cgi?id=22007
Bug ID: 22007
Summary: Create subregister liveness tracking tests later
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: ASSIGNED
Severity: enhancement
Priority: P
Component: Register Allocator
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Subregister liveness tracking is currently disabled in trunk while it is
developed. That means we cannot sensibly commit testcases for bugs we fix there
right now. This PR serves as a reminder to create test cases once we enable
subregister liveness for some targets.
- Kill flags are invalid for partially undefined uses. Fixed in r224664
- RegisterCoalescer failed to properly detect undef copies if only the
respective subranges were dead at the copy (but the main range alive). Fixed in
r224560
- LiveIntervalAnalysis::computeDeadValues() did not actually attach dead flags
to many values anymore. Fixed in r224538
- RegisterCoalescer::stripCopies() didn't pickup copies if they involved
subranges through multiple stages of indirection. Fixed in r224461
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