[ORC] Add ExecutorAddrRange::contains overload for ranges. (llvm#163321)

Can be used to test that one address range is fully contained within
another. This will be used in upcoming SimpleExecutorMemoryManager
changes.

Author: lhames

llvm/include/llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h

@@ -272,6 +272,9 @@ struct ExecutorAddrRange {
   }
 
   bool contains(ExecutorAddr Addr) const { return Start <= Addr && Addr < End; }
+  bool contains(const ExecutorAddrRange &Other) {
+    return (Other.Start >= Start && Other.End <= End);
+  }
   bool overlaps(const ExecutorAddrRange &Other) {
     return !(Other.End <= Start || End <= Other.Start);
   }

llvm/unittests/ExecutionEngine/Orc/ExecutorAddressTest.cpp

@@ -97,10 +97,16 @@ TEST(ExecutorAddrTest, AddrRanges) {
   EXPECT_FALSE(R1.contains(A0));
   EXPECT_FALSE(R1.contains(A2));
 
+  EXPECT_TRUE(R3.contains(R0));  // True for singleton range at start.
+  EXPECT_TRUE(R3.contains(R1));  // True for singleton range at end.
+  EXPECT_FALSE(R3.contains(R2)); // False for non-overlaping singleton range.
+  EXPECT_FALSE(R3.contains(R4)); // False for overlapping, uncontained range.
+
   EXPECT_FALSE(R1.overlaps(R0));
   EXPECT_FALSE(R1.overlaps(R2));
   EXPECT_TRUE(R1.overlaps(R3));
   EXPECT_TRUE(R1.overlaps(R4));
+  EXPECT_TRUE(R3.overlaps(R4));
 
   EXPECT_LE(R0, R0);
   EXPECT_LT(R0, R1);