diff options
| author | Lang Hames <lhames@gmail.com> | 2019-05-16 18:29:34 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2019-05-16 18:29:34 +0000 |
| commit | c97b50e2247ffcea30138f2255d48ff83426e8b2 (patch) | |
| tree | e75829a54aab5ce433b4c8865bae3606a17e3094 /lldb/packages/Python/lldbsuite/test | |
| parent | 20040db9a686e9d946cc40acee17d7a00ceeede3 (diff) | |
| download | bcm5719-llvm-c97b50e2247ffcea30138f2255d48ff83426e8b2.tar.gz bcm5719-llvm-c97b50e2247ffcea30138f2255d48ff83426e8b2.zip | |
[ORC] Change handling for SymbolStringPtr tombstones and empty keys.
SymbolStringPtr used to use nullptr as its empty value and (since it performed
ref-count operations on any non-nullptr) a pointer to a special pool-entry
instance as its tombstone.
This commit changes the scheme to use two invalid pointer values as the empty
and tombstone values, and broadens the ref-count guard to prevent ref-counting
operations from being performed on these pointers. This should improve the
performance of SymbolStringPtrs used in DenseMaps/DenseSets, as ref counting
operations will no longer be performed on the tombstone.
llvm-svn: 360925
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test')
0 files changed, 0 insertions, 0 deletions
