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Speed up addRegisterDead by adding more fast checks before performing the expensive

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subregister query, and by increasing the size of the subregister hashtable so
that there are fewer collisions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2008-08-14 18:34:18 +00:00
parent a8c763b307
commit 22ae999082
2 changed files with 12 additions and 4 deletions
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4
lib/CodeGen/MachineInstr.cpp
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@ -834,7 +834,9 @@ bool MachineInstr::addRegisterDead(unsigned IncomingReg,
// There exists a super-register that's marked dead.
if (RegInfo->isSuperRegister(IncomingReg, Reg))
return true;
if (RegInfo->isSubRegister(IncomingReg, Reg))
if (RegInfo->getSubRegisters(IncomingReg) &&
RegInfo->getSuperRegisters(Reg) &&
RegInfo->isSubRegister(IncomingReg, Reg))
DeadOps.push_back(i);
}
}