diff options
| author | Daniel Dunbar <daniel@zuster.org> | 2010-03-25 19:35:56 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2010-03-25 19:35:56 +0000 |
| commit | 6432bd744e0070953ff2bd21a9890688bc0e77c7 (patch) | |
| tree | 5afa9e162c3681018c50ddaeba51b383596cbb71 /llvm/docs/CommandGuide/html | |
| parent | d919276bc02c599c07c12baaf094fe3f94b8f8a0 (diff) | |
| download | bcm5719-llvm-6432bd744e0070953ff2bd21a9890688bc0e77c7.tar.gz bcm5719-llvm-6432bd744e0070953ff2bd21a9890688bc0e77c7.zip | |
MC: Stop restarting layout on every relaxation.
- Still O(N^2), just a faster form, and now its the MCAsmLayout's fault.
On the .s I am tuning against (combine.s from 403.gcc):
--
ddunbar@lordcrumb:MC$ diff stats-before.txt stats-after.txt
5,10c5,10
< 1728 assembler - Number of assembler layout and relaxation steps
< 7707 assembler - Number of emitted assembler fragments
< 120588 assembler - Number of emitted object file bytes
< 2233448 assembler - Number of evaluated fixups
< 1727 assembler - Number of relaxed instructions
< 6723845 mcexpr - Number of MCExpr evaluations
---
> 3 assembler - Number of assembler layout and relaxation steps
> 7707 assembler - Number of emitted assembler fragments
> 120588 assembler - Number of emitted object file bytes
> 14796 assembler - Number of evaluated fixups
> 1727 assembler - Number of relaxed instructions
> 67889 mcexpr - Number of MCExpr evaluations
--
Feel free to LOL at the -before numbers, if you like.
I am a little surprised we make more than 2 relaxation passes. It's pretty
trivial for us to do relaxation out-of-order if that would give a speedup.
llvm-svn: 99543
Diffstat (limited to 'llvm/docs/CommandGuide/html')
0 files changed, 0 insertions, 0 deletions
