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Don't add live ranges for aliases of physregs that are live in to the 

function. They don't appear to be used, and are inconsistent with handling of
other physreg intervals (i.e. intervals that are not live-in) where ranges are
not inserted for aliases.

llvm-svn: 148986
This commit is contained in:
Lang Hames 2012-01-25 22:11:06 +00:00
parent 65e2465550
commit f1508b78f9
1 changed files with 0 additions and 5 deletions
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5
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -582,11 +582,6 @@ void LiveIntervals::computeIntervals() {
for (MachineBasicBlock::livein_iterator LI = MBB->livein_begin(),
LE = MBB->livein_end(); LI != LE; ++LI) {
handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*LI));
// Multiple live-ins can alias the same register.
for (const unsigned* AS = tri_->getSubRegisters(*LI); *AS; ++AS)
if (!hasInterval(*AS))
handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*AS),
true);
}
// Skip over empty initial indices.