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| author | Jeffrey Yasskin <jyasskin@google.com> | 2009-05-26 18:27:15 +0000 |
|---|---|---|
| committer | Jeffrey Yasskin <jyasskin@google.com> | 2009-05-26 18:27:15 +0000 |
| commit | 493a3d015cbb2bcc18d9293a4dec3b35c7493818 (patch) | |
| tree | 0ba9a0617346b05c385d9490ac306a9b21e57d64 /Makefile.rules | |
| parent | 91bb61a1e2c96f727726c2fe7962df3e18ef5416 (diff) | |
| download | llvm-493a3d015cbb2bcc18d9293a4dec3b35c7493818.tar.gz llvm-493a3d015cbb2bcc18d9293a4dec3b35c7493818.tar.bz2 llvm-493a3d015cbb2bcc18d9293a4dec3b35c7493818.tar.xz | |
LiveVariables::VarInfo contains an AliveBlocks BitVector, which has as many
entries as there are basic blocks in the function. LiveVariables::getVarInfo
creates a VarInfo struct for every register in the function, leading to
quadratic space use. This patch changes the BitVector to a SparseBitVector,
which doesn't help the worst-case memory use but does reduce the actual use in
very long functions with short-lived variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72426 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'Makefile.rules')
0 files changed, 0 insertions, 0 deletions