test/CodeGen/builtinshufflevector.c

// RUN: clang -emit-llvm < %s 2>&1 | grep 'shufflevector' | count 1
typedef int v4si __attribute__ ((vector_size (16)));

v4si a(v4si x, v4si y) {return __builtin_shufflevector(x, y, 3, 2, 5, 7);}