Exit with nice warnings when register allocator run out of registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63267 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index 4392652..6341b9c 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -244,6 +244,16 @@
return ranges.insert(it, LR);
}
+/// isInOneLiveRange - Return true if the range specified is entirely in the
+/// a single LiveRange of the live interval.
+bool LiveInterval::isInOneLiveRange(unsigned Start, unsigned End) {
+ Ranges::iterator I = std::upper_bound(ranges.begin(), ranges.end(), Start);
+ if (I == ranges.begin())
+ return false;
+ --I;
+ return I->contains(Start) && I->contains(End-1);
+}
+
/// removeRange - Remove the specified range from this interval. Note that
/// the range must be in a single LiveRange in its entirety.