[clang] Use llvm::append_range (NFC) (#136256)

This patch replaces:

  llvm::copy(Src, std::back_inserter(Dst));

with:

  llvm::append_range(Dst, Src);

for breavity.

One side benefit is that llvm::append_range eventually calls
llvm::SmallVector::reserve if Dst is of llvm::SmallVector.

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaConcept.cpp b/clang/lib/Sema/SemaConcept.cpp
index 73bc873..5424d20 100644
--- a/clang/lib/Sema/SemaConcept.cpp
+++ b/clang/lib/Sema/SemaConcept.cpp
@@ -2012,8 +2012,8 @@ FormulaType SubsumptionChecker::Normalize(const NormalizedConstraint &NC) {
     for (const auto &RTransform : Right) {
       Clause Combined;
       Combined.reserve(LTransform.size() + RTransform.size());
-      llvm::copy(LTransform, std::back_inserter(Combined));
-      llvm::copy(RTransform, std::back_inserter(Combined));
+      llvm::append_range(Combined, LTransform);
+      llvm::append_range(Combined, RTransform);
       Add(std::move(Combined));
     }
   }