git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223887
91177308-0d34-0410-b5e6-
96231b3b80d8
SubRanges = nullptr;
}
+ /// Removes all subranges without any segments (subranges without segments
+ /// are not considered valid and should only exist temporarily).
+ void removeEmptySubRanges();
+
/// getSize - Returns the sum of sizes of all the LiveRange's.
///
unsigned getSize() const;
return V2;
}
+void LiveInterval::removeEmptySubRanges() {
+ SubRange **NextPtr = &SubRanges;
+ SubRange *I = *NextPtr;
+ while (I != nullptr) {
+ if (!I->empty()) {
+ NextPtr = &I->Next;
+ I = *NextPtr;
+ continue;
+ }
+ // Skip empty subranges until we find the first nonempty one.
+ do {
+ I = I->Next;
+ } while (I != nullptr && I->empty());
+ *NextPtr = I;
+ }
+}
+
unsigned LiveInterval::getSize() const {
unsigned Sum = 0;
for (const_iterator I = begin(), E = end(); I != E; ++I)