Small fixes to GLSL-legalize and func-property prop. (#2950)

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

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/bugs/mutating/buffer-write-dce.slang b/tests/bugs/mutating/buffer-write-dce.slang
new file mode 100644
index 000000000..c784531d3
--- /dev/null
+++ b/tests/bugs/mutating/buffer-write-dce.slang
@@ -0,0 +1,28 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+
+// Confirm that calling a mutating method to write to a buffer location doesn't
+// get DCE'd.
+
+struct C
+{
+    int a;
+    [mutating]
+    void set(int val)
+    {
+        a = val;
+    }
+}
+
+//TEST_INPUT:ubuffer(data=[0], stride=4):out, name outputBuffer
+RWStructuredBuffer<C> outputBuffer;
+void writeOutput(int tid)
+{
+    outputBuffer[tid].set(1);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int tid = dispatchThreadID.x;
+    writeOutput(tid);
+}
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