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| author | Mehdi Amini <mehdi.amini@apple.com> | 2016-03-19 00:59:26 +0000 |
|---|---|---|
| committer | Mehdi Amini <mehdi.amini@apple.com> | 2016-03-19 00:59:26 +0000 |
| commit | 53fc3895e0c5c6a25951d980ca236e23a7cffe3d (patch) | |
| tree | 00cda545bacb45db2cc46fece0e68c6f19f50181 /llvm/lib/IR/DebugInfoMetadata.cpp | |
| parent | d23be3d30d808c4c0d9a6cbd98274ec49afef7a9 (diff) | |
| download | bcm5719-llvm-53fc3895e0c5c6a25951d980ca236e23a7cffe3d.tar.gz bcm5719-llvm-53fc3895e0c5c6a25951d980ca236e23a7cffe3d.zip | |
Compute some Debug Info Metadata hash key partially (NFC)
Summary:
This patch changes the computation of the hash key for DISubprogram to
be computed on a small subset of the fields. The hash is computed a
lot faster, but there might be more collision in the table.
However by carefully selecting the fields, colisions should be rare.
Using `opt` to load the IR for FastISelEmitter.cpp.o, with this patch:
- DISubprogram::getImpl() goes from 28ms to 15ms.
- DICompositeType::getImpl() goes from 6ms to 2ms
- DIDerivedType::getImpl() goes from 18 to 12ms
Reviewers: dexonsmith
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D16571
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 263866
Diffstat (limited to 'llvm/lib/IR/DebugInfoMetadata.cpp')
0 files changed, 0 insertions, 0 deletions
