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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-10-02 21:46:39 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-10-02 21:46:39 +0000 |
| commit | bb999c2f7200143f3e52f74d6d6c983161f0805b (patch) | |
| tree | a0681041c5fb932ed11053ea32a2050b55b4e77f /clang/lib/Serialization/ModuleManager.cpp | |
| parent | b45bcc6d72e5854d71666b368acf40910e09be10 (diff) | |
| download | llvm-bb999c2f7200143f3e52f74d6d6c983161f0805b.zip llvm-bb999c2f7200143f3e52f74d6d6c983161f0805b.tar.gz llvm-bb999c2f7200143f3e52f74d6d6c983161f0805b.tar.bz2 | |
Make sure the whole live range is covered when values are pruned twice.
JoinVals::pruneValues() calls LIS->pruneValue() to avoid conflicts when
overlapping two different values. This produces a set of live range end
points that are used to reconstruct the live range (with SSA update)
after joining the two registers.
When a value is pruned twice, the set of end points was insufficient:
v1 = DEF
v1 = REPLACE1
v1 = REPLACE2
KILL v1
The end point at KILL would only reconstruct the live range from
REPLACE2 to KILL, leaving the range REPLACE1-REPLACE2 dead.
Add REPLACE2 as an end point in this case so the full live range is
reconstructed.
This fixes PR13999.
llvm-svn: 165056
Diffstat (limited to 'clang/lib/Serialization/ModuleManager.cpp')
0 files changed, 0 insertions, 0 deletions