Introduce a range version of std::find, and use in SCEV

Reviewers: dblaikie, pcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D15064

llvm-svn: 254391

2 files changed, 8 insertions, 2 deletions

diff --git a/llvm/include/llvm/ADT/STLExtras.h b/llvm/include/llvm/ADT/STLExtras.h
index 3655a20d883..d4360fa8d21 100644
--- a/llvm/include/llvm/ADT/STLExtras.h
+++ b/llvm/include/llvm/ADT/STLExtras.h
@@ -379,6 +379,13 @@ bool any_of(R &&Range, UnaryPredicate &&P) {
                      std::forward<UnaryPredicate>(P));
 }
 
+/// Provide wrappers to std::find which take ranges instead of having to pass
+/// begin/end explicitly.
+template<typename R, class T>
+auto find(R &&Range, const T &val) -> decltype(Range.begin()) {
+  return std::find(Range.begin(), Range.end(), val);
+}
+
 //===----------------------------------------------------------------------===//
 //     Extra additions to <memory>
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index 4c8b6e7de84..d04028b15e2 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -7964,8 +7964,7 @@ static bool IsMaxConsistingOf(const SCEV *MaybeMaxExpr,
   const MaxExprType *MaxExpr = dyn_cast<MaxExprType>(MaybeMaxExpr);
   if (!MaxExpr) return false;
 
-  auto It = std::find(MaxExpr->op_begin(), MaxExpr->op_end(), Candidate);
-  return It != MaxExpr->op_end();
+  return find(MaxExpr->operands(), Candidate) != MaxExpr->op_end();
 }