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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 | 27cb347d0e765175efb2c4d388bcbba84cf1b95e (patch) | |
| tree | 3941172340fa3c1f5c26af2731534f62c2781064 /lib/CodeGen/GCStrategy.cpp | |
| parent | abe704309f2958f14ba4b59d9be8c9fba72a48c1 (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165056 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/GCStrategy.cpp')
0 files changed, 0 insertions, 0 deletions