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Changed my mind. We now allow remat of instructions whose defs have subreg indices.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76100 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-07-16 20:15:00 +00:00
parent 914e50c841
commit 5f15992b77
3 changed files with 9 additions and 10 deletions
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lib/CodeGen/LiveIntervalAnalysis.cpp
-5
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@@ -1157,11 +1157,6 @@ bool LiveIntervals::isReMaterializable(const LiveInterval &li,
if (DisableReMat)
return false;
// FIXME: For now, avoid remating instructions whose definition has a subreg
// index. It's just incredibly difficult to get right.
if (MI->findRegisterDefOperand(li.reg)->getSubReg())
return false;
if (MI->getOpcode() == TargetInstrInfo::IMPLICIT_DEF)
return true;