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| author | Chris Lattner <sabre@nondot.org> | 2007-08-05 07:32:14 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-08-05 07:32:14 +0000 |
| commit | f093941458bb8560e6c38afc41ed5de5b73858e7 (patch) | |
| tree | 3a77344832b30c3317ca27bc483ca7690d4e7dc8 /lib/Analysis/BasicAliasAnalysis.cpp | |
| parent | 8be9adb22058a5033b0b30f6ae3eeb32eea13648 (diff) | |
| download | external_llvm-f093941458bb8560e6c38afc41ed5de5b73858e7.zip external_llvm-f093941458bb8560e6c38afc41ed5de5b73858e7.tar.gz external_llvm-f093941458bb8560e6c38afc41ed5de5b73858e7.tar.bz2 | |
When clearing a SmallPtrSet, if the set had a huge capacity, but the
contents of the set were small, deallocate and shrink the set. This
avoids having us to memset as much data, significantly speeding up
some pathological cases. For example, this speeds up the verifier
from 0.3899s to 0.0763 (5.1x) on the testcase from PR1432 in a
release build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40837 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/BasicAliasAnalysis.cpp')
0 files changed, 0 insertions, 0 deletions