Remove LiveIntervals::trackingRegUnits().
With regunit liveness permanently enabled, this function would always
return true.
Also remove now obsolete code for checking physreg interference.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159006 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 5759333..d0db26b 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -236,64 +236,20 @@
continue;
// vregLI overlaps fixed regunit interference.
- if (LIS->trackingRegUnits()) {
- bool Interference = false;
- for (MCRegUnitIterator Units(preg, tri); Units.isValid(); ++Units) {
- if (vregLI->overlaps(LIS->getRegUnit(*Units))) {
- Interference = true;
- break;
- }
+ bool Interference = false;
+ for (MCRegUnitIterator Units(preg, tri); Units.isValid(); ++Units) {
+ if (vregLI->overlaps(LIS->getRegUnit(*Units))) {
+ Interference = true;
+ break;
}
- if (Interference)
- continue;
}
+ if (Interference)
+ continue;
// preg is usable for this virtual register.
vrAllowed.push_back(preg);
}
- RegSet overlappingPRegs;
-
- // Record physical registers whose ranges overlap.
- for (RegSet::const_iterator pregItr = pregs.begin(),
- pregEnd = pregs.end();
- pregItr != pregEnd; ++pregItr) {
- unsigned preg = *pregItr;
- if (!LIS->hasInterval(preg))
- continue;
- const LiveInterval *pregLI = &LIS->getInterval(preg);
-
- if (pregLI->empty()) {
- continue;
- }
-
- if (vregLI->overlaps(*pregLI))
- overlappingPRegs.insert(preg);
- }
-
- for (RegSet::const_iterator pregItr = overlappingPRegs.begin(),
- pregEnd = overlappingPRegs.end();
- pregItr != pregEnd; ++pregItr) {
- unsigned preg = *pregItr;
-
- // Remove the register from the allowed set.
- VRAllowed::iterator eraseItr =
- std::find(vrAllowed.begin(), vrAllowed.end(), preg);
-
- if (eraseItr != vrAllowed.end()) {
- vrAllowed.erase(eraseItr);
- }
-
- // Also remove any aliases.
- for (MCRegAliasIterator AI(preg, tri, false); AI.isValid(); ++AI) {
- VRAllowed::iterator eraseItr =
- std::find(vrAllowed.begin(), vrAllowed.end(), *AI);
- if (eraseItr != vrAllowed.end()) {
- vrAllowed.erase(eraseItr);
- }
- }
- }
-
// Construct the node.
PBQP::Graph::NodeItr node =
g.addNode(PBQP::Vector(vrAllowed.size() + 1, 0));