Add llvm::all_of which wraps std::all_of.

This version doesn't need begin/end but can instead just take a type which has begin/end methods.

Use this to replace an eligible foreach loop in LoopInfo found by David Blaikie in r237224.

Reviewed by David Blaikie.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237301 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/STLExtras.h

@@ -18,6 +18,7 @@
 #define LLVM_ADT_STLEXTRAS_H
 
 #include "llvm/Support/Compiler.h"
+#include <algorithm> // for std::all_of
 #include <cassert>
 #include <cstddef> // for std::size_t
 #include <cstdlib> // for qsort
@@ -327,6 +328,14 @@ void DeleteContainerSeconds(Container &C) {
   C.clear();
 }
 
+/// Provide wrappers to std::all_of which take ranges instead of having to pass
+/// being/end explicitly.
+template<typename R, class UnaryPredicate>
+bool all_of(R &&Range, UnaryPredicate &&P) {
+  return std::all_of(Range.begin(), Range.end(),
+                     std::forward<UnaryPredicate>(P));
+}
+
 //===----------------------------------------------------------------------===//
 //     Extra additions to <memory>
 //===----------------------------------------------------------------------===//