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| author | serge-sans-paille <sguelton@redhat.com> | 2020-07-28 10:55:09 +0200 |
|---|---|---|
| committer | serge-sans-paille <sguelton@redhat.com> | 2020-07-28 11:01:04 +0200 |
| commit | 3218c064d6d8c2cc910570c9a13cb859a2e91d08 (patch) | |
| tree | 71280a60d93b54970b6f7384ce9fca3d700b9511 /llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp | |
| parent | ee068aafbc5c6722158d5113290a211503e1cfe4 (diff) | |
| download | llvm-3218c064d6d8c2cc910570c9a13cb859a2e91d08.zip llvm-3218c064d6d8c2cc910570c9a13cb859a2e91d08.tar.gz llvm-3218c064d6d8c2cc910570c9a13cb859a2e91d08.tar.bz2 | |
[legacyPM] Do not compute preserved analysis if there's no local change
All analysis are preserved if there's no local change, and thanks to
3667d87a33d3c8d4072a41fd84bb880c59347dc0 this property is enforced for all
passes.
Skipping the dependency computation improves the performance when there's a lot
of small functions, where only a few change happen.
Thanks to Nikita Popov who provided this numbers (extract below)
https://llvm-compile-time-tracker.com/compare.php?from=183342c0a9850e60dd7a004b651c83dfb3a7d25e&to=f2f91e6a2743070471cc9471e4e8c646e50c653c&stat=instructions
O3: (number of instructions)
Benchmark Old New
kimwitu++ 60783M 59968M (-1.34%)
sqlite3 73200M 73083M (-0.16%)
consumer-typeset 52776M 52712M (-0.12%)
Bullet 133709M 132940M (-0.58%)
tramp3d-v4 123864M 123186M (-0.55%)
mafft 55534M 55477M (-0.10%)
ClamAV 76292M 76164M (-0.17%)
lencod 103190M 103061M (-0.13%)
SPASS 64068M 63713M (-0.55%)
7zip 197332M 196308M (-0.52%)
geomean 85750M 85389M (-0.42%)
Differential Revision: https://reviews.llvm.org/D80707
Diffstat (limited to 'llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp')
0 files changed, 0 insertions, 0 deletions