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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-08-05 22:20:45 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-08-05 22:20:45 +0000 |
| commit | 2d6d86be84ee355223ccd20b7f87a0c9971c50c9 (patch) | |
| tree | 444ace3252917e51cfbe061f6d7f2699ebdf65a6 /lib/CodeGen/LiveDebugVariables.cpp | |
| parent | 0d6fac36eda6b65f0e396b24c5bce582f89f7992 (diff) | |
Split around single instructions to enable register class inflation.
Normally, we don't create a live range for a single instruction in a
basic block, the spiller does that anyway. However, when splitting a
live range that belongs to a proper register sub-class, inserting these
extra COPY instructions completely remove the constraints from the
remainder interval, and it may be allocated from the larger super-class.
The spiller will mop up these small live ranges if we end up spilling
anyway. It calls them snippets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136989 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveDebugVariables.cpp')
0 files changed, 0 insertions, 0 deletions