1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ir/loop-dce.slang b/tests/ir/loop-dce.slang
new file mode 100644
index 000000000..f89c1aa38
--- /dev/null
+++ b/tests/ir/loop-dce.slang
@@ -0,0 +1,40 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<uint> outputBuffer;
+
+__target_intrinsic(hlsl, "@")
+__target_intrinsic(glsl, "@")
+__target_intrinsic(cpp, "@")
+__target_intrinsic(cuda, "@")
+[__readNone]
+int produceSyntaxError() { return 0; }
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    int sum = 0;
+    int array[100];
+    // Next, this loop will be removed because there is no use of `array`.
+    for (int i = 0; i < 100; i++)
+    {
+        // This loop must be removed, or we will fail downstream compilation.
+        array[i] = i + produceSyntaxError();
+    }
+
+    // First, this loop will be removed because there is no use of `sum`.
+    for (int i = 0; i < 100; i++)
+    {
+        // This loop must be removed, or we will fail downstream compilation.
+        if (i < 50)
+        {
+            sum += array[i] + produceSyntaxError();
+        }
+        else
+        {
+            sum += i * 2 + produceSyntaxError();
+        }
+    }
+    outputBuffer[0] = 1;
+}