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StrongPHIElimination doesn't support swapping live intervals like the coalescer does.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48802 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-03-25 22:25:27 +00:00
parent 950a4c40b8
commit 403dad6660
1 changed files with 6 additions and 9 deletions
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15
lib/CodeGen/StrongPHIElimination.cpp
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@ -866,15 +866,9 @@ void StrongPHIElimination::mergeLiveIntervals(unsigned primary,
// If we get here, we know that we can coalesce the live ranges. Ask the
// intervals to coalesce themselves now.
if ((RHS.ranges.size() > LHS.ranges.size() &&
TargetRegisterInfo::isVirtualRegister(LHS.reg)) ||
TargetRegisterInfo::isPhysicalRegister(RHS.reg)) {
RHS.join(LHS, &RHSValNoAssignments[0], &LHSValNoAssignments[0], NewVNInfo);
LI.removeInterval(primary);
} else {
LHS.join(RHS, &LHSValNoAssignments[0], &RHSValNoAssignments[0], NewVNInfo);
LI.removeInterval(secondary);
}
LHS.join(RHS, &LHSValNoAssignments[0], &RHSValNoAssignments[0], NewVNInfo);
LI.removeInterval(secondary);
}
bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
@ -921,5 +915,8 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
(*I)->eraseFromParent();
}
for (LiveIntervals::iterator I = LI.begin(), E = LI.end(); I != E; ++I)
I->second.dump();
return false;
}