Support constant folding for static array access. (#5248)

* Support constant folding for static array access.

* Fix test.

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/language-feature/constants/static-array-indexing.slang b/tests/language-feature/constants/static-array-indexing.slang
new file mode 100644
index 000000000..0a7963b34
--- /dev/null
+++ b/tests/language-feature/constants/static-array-indexing.slang
@@ -0,0 +1,18 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): 
+
+int check<int v>()
+{
+    return v;
+}
+
+//TEST_INPUT:ubuffer(data=[0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+[numthreads(1, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int tid = dispatchThreadID.x;
+    const int a[] = { 1, 2, 3, 4 };
+    // CHECK: 4
+    outputBuffer[tid] = check<a[3]>();
+}