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Add an experimental -early-live-intervals option.

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This option runs LiveIntervals before TwoAddressInstructionPass which
will eventually learn to exploit and update the analysis.

Eventually, LiveIntervals will run before PHIElimination, and we can get
rid of LiveVariables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161270 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-08-03 22:12:54 +00:00
parent e744ac49f4
commit dcc4436cdd
3 changed files with 14 additions and 0 deletions
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lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -45,6 +45,7 @@ NewLiveIntervals("new-live-intervals", cl::Hidden,
cl::desc("Use new algorithm forcomputing live intervals"));
char LiveIntervals::ID = 0;
char &llvm::LiveIntervalsID = LiveIntervals::ID;
INITIALIZE_PASS_BEGIN(LiveIntervals, "liveintervals",
"Live Interval Analysis", false, false)
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)