llvm-isel-fuzzer: Add some basic tests

llvm-svn: 312427
diff --git a/llvm/test/tools/llvm-isel-fuzzer/aarch64-empty-bc.ll b/llvm/test/tools/llvm-isel-fuzzer/aarch64-empty-bc.ll
new file mode 100644
index 0000000..1871199
--- /dev/null
+++ b/llvm/test/tools/llvm-isel-fuzzer/aarch64-empty-bc.ll
@@ -0,0 +1,6 @@
+; REQUIRES: aarch64-registered-target
+
+; RUN: opt -o %t %s
+; RUN: llvm-isel-fuzzer %t -ignore_remaining_args=1 -mtriple aarch64 2>&1 | FileCheck %s
+
+; CHECK: Running