[IPO] Use std::tie to implement operator< (NFC)

[kazutakahirata]

std::tie facilitates lexicographical comparisons through std::tuple's
built-in operator<.

[llvmbot]

@llvm/pr-subscribers-llvm-transforms

Author: Kazu Hirata (kazutakahirata)

Changes

std::tie facilitates lexicographical comparisons through std::tuple's
built-in operator<.

---

Full diff: https://github.com/llvm/llvm-project/pull/143561.diff

1 Files Affected:

• (modified) llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h (+1-1)

diff --git a/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h b/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
index d34473f03c8de..7a03405b4f462 100644
--- a/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
+++ b/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
@@ -113,7 +113,7 @@ struct TypeMemberInfo {
   uint64_t Offset;
 
   bool operator<(const TypeMemberInfo &other) const {
-    return Bits < other.Bits || (Bits == other.Bits && Offset < other.Offset);
+    return std::tie(Bits, Offset) < std::tie(other.Bits, other.Offset);
   }
 };