[ORC] Add ordering to ExecutorAddrRanges.

This allows ranges to be sorted and used as map keys.

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

@@ -206,6 +206,27 @@ struct ExecutorAddrRange {
                          const ExecutorAddrRange &RHS) {
     return !(LHS == RHS);
   }
+  friend bool operator<(const ExecutorAddrRange &LHS,
+                        const ExecutorAddrRange &RHS) {
+    return LHS.Start < RHS.Start ||
+           (LHS.Start == RHS.Start && LHS.End < RHS.End);
+  }
+  friend bool operator<=(const ExecutorAddrRange &LHS,
+                         const ExecutorAddrRange &RHS) {
+    return LHS.Start < RHS.Start ||
+           (LHS.Start == RHS.Start && LHS.End <= RHS.End);
+  }
+  friend bool operator>(const ExecutorAddrRange &LHS,
+                        const ExecutorAddrRange &RHS) {
+    return LHS.Start > RHS.Start ||
+           (LHS.Start == RHS.Start && LHS.End > RHS.End);
+  }
+  friend bool operator>=(const ExecutorAddrRange &LHS,
+                         const ExecutorAddrRange &RHS) {
+    return LHS.Start > RHS.Start ||
+           (LHS.Start == RHS.Start && LHS.End >= RHS.End);
+  }
+
   bool contains(ExecutorAddr Addr) const { return Start <= Addr && Addr < End; }
   bool overlaps(const ExecutorAddrRange &Other) {
     return !(Other.End <= Start || End <= Other.Start);

llvm/unittests/ExecutionEngine/Orc/ExecutorAddressTest.cpp

@@ -100,6 +100,11 @@ TEST(ExecutorAddrTest, AddrRanges) {
   EXPECT_FALSE(R1.overlaps(R2));
   EXPECT_TRUE(R1.overlaps(R3));
   EXPECT_TRUE(R1.overlaps(R4));
+
+  EXPECT_LE(R0, R0);
+  EXPECT_LT(R0, R1);
+  EXPECT_GE(R0, R0);
+  EXPECT_GT(R1, R0);
 }
 
 } // namespace