StrongPHIElimination doesn't support swapping live intervals like the coalescer does.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48802 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp
index ff5a9aa..f45c95f 100644
--- a/lib/CodeGen/StrongPHIElimination.cpp
+++ b/lib/CodeGen/StrongPHIElimination.cpp
@@ -866,15 +866,9 @@
// 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 @@
(*I)->eraseFromParent();
}
+ for (LiveIntervals::iterator I = LI.begin(), E = LI.end(); I != E; ++I)
+ I->second.dump();
+
return false;
}