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Remove the TII::scheduleTwoAddrSource() hook.

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It never does anything when running 'make check', and it get's in the
way of updating live intervals in 2-addr.

The hook was originally added to help form IT blocks in Thumb2 code
before register allocation, but the pass ordering has changed since
then, and we run if-conversion after register allocation now.

When the MI scheduler is enabled, there will be no less than two
schedulers between 2-addr and Thumb2ITBlockPass, so this hook is
unlikely to help anything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161794 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-08-13 21:52:57 +00:00
parent 6de47d611e
commit 43600e95ec
4 changed files with 0 additions and 66 deletions
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lib/CodeGen/TwoAddressInstructionPass.cpp
-11
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@@ -1352,17 +1352,6 @@ TwoAddressInstructionPass::processTiedPairs(MachineInstr *MI,
}
}
}
// We didn't change anything if there was a single tied pair, and that
// pair didn't require copies.
if (AllUsesCopied || TiedPairs.size() > 1) {
// Schedule the source copy / remat inserted to form two-address
// instruction. FIXME: Does it matter the distance map may not be
// accurate after it's scheduled?
MachineBasicBlock::iterator PrevMI = MI;
--PrevMI;
TII->scheduleTwoAddrSource(PrevMI, MI, *TRI);
}
}
/// runOnMachineFunction - Reduce two-address instructions to two operands.