[pstl] Use std::transform_reduce instead of hand-rolled implementation

ldionne · ldionne · commit 3559fcd1149b · 2019-07-16T17:29:09.000Z
llvm-svn: 366233
diff --git a/pstl/include/pstl/internal/numeric_impl.h b/pstl/include/pstl/internal/numeric_impl.h
@@ -93,11 +93,7 @@ _Tp
 __brick_transform_reduce(_ForwardIterator __first, _ForwardIterator __last, _Tp __init, _BinaryOperation __binary_op,
                          _UnaryOperation __unary_op, /*is_vector=*/std::false_type) noexcept
 {
-    for (; __first != __last; ++__first)
-    {
-        __init = __binary_op(__init, __unary_op(*__first));
-    }
-    return __init;
+    return std::transform_reduce(__first, __last, __init, __binary_op, __unary_op);
 }
 
 template <class _ForwardIterator, class _Tp, class _UnaryOperation, class _BinaryOperation>

Original file line number	Diff line number	Diff line change
`@@ -93,11 +93,7 @@ _Tp`
`93`	`93`	`__brick_transform_reduce(_ForwardIterator __first, _ForwardIterator __last, _Tp __init, _BinaryOperation __binary_op,`
`94`	`94`	`_UnaryOperation __unary_op, /is_vector=/std::false_type) noexcept`
`95`	`95`	`{`
`96`		`- for (; __first != __last; ++__first)`
`97`		`- {`
`98`		`- __init = __binary_op(__init, __unary_op(*__first));`
`99`		`- }`
`100`		`- return __init;`
	`96`	`+ return std::transform_reduce(__first, __last, __init, __binary_op, __unary_op);`
`101`	`97`	`}`
`102`	`98`
`103`	`99`	`template <class _ForwardIterator, class _Tp, class _UnaryOperation, class _BinaryOperation>`