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| author | Chris Lattner <sabre@nondot.org> | 2005-08-23 22:27:31 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-08-23 22:27:31 +0000 |
| commit | b980578b4160cf8ef1ba6d33e85c50eaeef0eef8 (patch) | |
| tree | ed96115c0933b48b1d228a67b69491d9c4d374b2 /lib/CodeGen/LiveIntervalAnalysis.cpp | |
| parent | ef35ba4f646457728a57f73f93e816b77bd9c8a7 (diff) | |
Keep track of which registers are related to which other registers.
Use this information to avoid doing expensive interval intersections for
registers that could not possible be interesting. This speeds up linscan
on ia64 compiling kc++ in release mode from taking 7.82s to 4.8s(!), total
itanium llc time on this program is 27.3s now. This marginally speeds up
PPC and X86, but they appear to be limited by other parts of linscan, not
this code.
On this program, on itanium, live intervals now takes 41% of llc time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22986 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
0 files changed, 0 insertions, 0 deletions