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Revert "pre-RA-sched: fix TargetOpcode usage"

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This reverts commit 06091513c2.

The code is obviously wrong, but the trivial fix causes
inefficient code generation on X86. Somebody with more
knowledge of the code needs to take a look here.

Signed-off-by: Christian König <christian.koenig@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177529 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Christian Konig 2013-03-20 15:43:00 +00:00
parent fa963a885c
commit 61aba54f2c
1 changed files with 12 additions and 18 deletions
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30
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
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@ -1894,15 +1894,12 @@ unsigned RegReductionPQBase::getNodePriority(const SUnit *SU) const {
// CopyToReg should be close to its uses to facilitate coalescing and
// avoid spilling.
return 0;
if (SU->getNode() && SU->getNode()->isMachineOpcode()) {
Opc = SU->getNode()->getMachineOpcode();
if (Opc == TargetOpcode::EXTRACT_SUBREG ||
Opc == TargetOpcode::SUBREG_TO_REG ||
Opc == TargetOpcode::INSERT_SUBREG)
// EXTRACT_SUBREG, INSERT_SUBREG, and SUBREG_TO_REG nodes should be
// close to their uses to facilitate coalescing.
return 0;
}
if (Opc == TargetOpcode::EXTRACT_SUBREG ||
Opc == TargetOpcode::SUBREG_TO_REG ||
Opc == TargetOpcode::INSERT_SUBREG)
// EXTRACT_SUBREG, INSERT_SUBREG, and SUBREG_TO_REG nodes should be
// close to their uses to facilitate coalescing.
return 0;
if (SU->NumSuccs == 0 && SU->NumPreds != 0)
// If SU does not have a register use, i.e. it doesn't produce a value
// that would be consumed (e.g. store), then it terminates a chain of
@ -2588,15 +2585,12 @@ static bool canEnableCoalescing(SUnit *SU) {
// avoid spilling.
return true;
if (SU->getNode() && SU->getNode()->isMachineOpcode()) {
Opc = SU->getNode()->getMachineOpcode();
if (Opc == TargetOpcode::EXTRACT_SUBREG ||
Opc == TargetOpcode::SUBREG_TO_REG ||
Opc == TargetOpcode::INSERT_SUBREG)
// EXTRACT_SUBREG, INSERT_SUBREG, and SUBREG_TO_REG nodes should be
// close to their uses to facilitate coalescing.
return true;
}
if (Opc == TargetOpcode::EXTRACT_SUBREG ||
Opc == TargetOpcode::SUBREG_TO_REG ||
Opc == TargetOpcode::INSERT_SUBREG)
// EXTRACT_SUBREG, INSERT_SUBREG, and SUBREG_TO_REG nodes should be
// close to their uses to facilitate coalescing.
return true;
if (SU->NumPreds == 0 && SU->NumSuccs != 0)
// If SU does not have a register def, schedule it close to its uses