(indirect) test for the __builtin_powi builtin which we now support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30224 91177308-0d34-0410-b5e6-96231b3b80d8

test/C++Frontend/2006-09-08-powi.cpp

@@ -0,0 +1,7 @@
+// RUN: llvm-g++ -O3 -S -o - %s
+
+#include <cmath>
+
+double foo(double X, int Y) {
+  return std::pow(X, Y);
+}