Fix partial inference of variadic generic functions. (#4956)

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/language-feature/generics/variadic-partial-inference.slang b/tests/language-feature/generics/variadic-partial-inference.slang
new file mode 100644
index 000000000..003d22424
--- /dev/null
+++ b/tests/language-feature/generics/variadic-partial-inference.slang
@@ -0,0 +1,25 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -cpu -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -vk -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+void aggregate(inout int v, int u)
+{
+    v = v * u;
+}
+
+T test<T:IInteger, each U : IInteger>(T t, expand each U u)
+{
+    int v = 1;
+    expand aggregate(v, (each u).toInt());
+    return t + T(v);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain()
+{
+    // CHECK: 11
+    outputBuffer[0] = test<int>(5, 1, 2, 3);
+}
\ No newline at end of file