Add Loop Unrolling Pass. (#2644)

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/ir/loop-unroll-1.slang b/tests/ir/loop-unroll-1.slang
new file mode 100644
index 000000000..562cd3713
--- /dev/null
+++ b/tests/ir/loop-unroll-1.slang
@@ -0,0 +1,25 @@
+//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;
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    int i = 0;
+    int sum = 0;
+    [ForceUnroll]
+    while (i < 2)
+    {
+        int j = 1;
+        [ForceUnroll(2)]
+        while (j < 3)
+        {
+            sum += (i+j);
+            j++;
+        }
+        i++;
+    }
+    outputBuffer[0] = sum;
+}