diff --git a/test/testhelpers/llvmpasses.jl b/test/testhelpers/llvmpasses.jl
new file mode 100644
index 0000000000000..0b443c3eb1535
--- /dev/null
+++ b/test/testhelpers/llvmpasses.jl
@@ -0,0 +1,27 @@
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+using InteractiveUtils
+using Printf
+
+# get a temporary directory
+dir = ARGS[1]
+rm(dir, force=true, recursive=true)
+mkdir(dir)
+
+# toggle between unoptimized (CHECK/LOWER) and optimized IR (FINAL).
+optimize=false
+if length(ARGS) >= 2
+    optimize = ARGS[2]=="-O"
+end
+
+# Emit LLVM IR to dir
+counter = 0
+function emit(f, tt...)
+    global counter
+    name = nameof(f)
+    open(joinpath(dir, @sprintf("%05d-%s.ll", counter, name)), "w") do io
+        code_llvm(io, f, tt, raw=true, optimize=optimize, dump_module=true, debuginfo=:none)
+    end
+    counter+=1
+end
+