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

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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148986 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2012-01-25 22:11:06 +00:00
parent c48d4dc8a9
commit 58a3685916
1 changed files with 0 additions and 5 deletions
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5
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.