Implement RAGreedy::splitAroundRegion and remove loop splitting.
Region splitting includes loop splitting as a subset, and it is more generic.
The splitting heuristics for variables that are live in more than one block are
now:
1. Try to create a region that covers multiple basic blocks.
2. Try to create a new live range for each block with multiple uses.
3. Spill.
Steps 2 and 3 are similar to what the standard spiller is doing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123853 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 7ed9089..a131344 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -867,9 +867,7 @@
/// LiveInterval, and ranges can be trimmed.
void SplitEditor::closeIntv() {
assert(openli_.getLI() && "openIntv not called before closeIntv");
-
- DEBUG(dbgs() << " closeIntv cleaning up\n");
- DEBUG(dbgs() << " open " << *openli_.getLI() << '\n');
+ DEBUG(dbgs() << " closeIntv " << *openli_.getLI() << '\n');
openli_.reset(0);
}
@@ -966,6 +964,8 @@
// FIXME: If a single value is redefined, just move the def and truncate.
LiveInterval &parent = edit_.getParent();
+ DEBUG(dbgs() << "computeRemainder from " << parent << '\n');
+
// Values that are fully contained in the split intervals.
SmallPtrSet<const VNInfo*, 8> deadValues;
// Map all curli values that should have live defs in dupli.