Fix generic param inference through TypeCastIntVal. (#2916)

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/language-feature/constants/generic-const-cast.slang b/tests/language-feature/constants/generic-const-cast.slang
new file mode 100644
index 000000000..eb4601872
--- /dev/null
+++ b/tests/language-feature/constants/generic-const-cast.slang
@@ -0,0 +1,26 @@
+//TEST:SIMPLE(filecheck=CHECK): -entry computeMain -profile cs_5_0 -target hlsl
+
+//TEST_INPUT:ubuffer(data=[0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+struct G<let m : uint>
+{
+    static const int r = m + 1;
+}
+
+// CHECK: int f_0()
+// CHECK: return int(3)
+
+int f<let n : int>(G<n> v)
+{
+    return v.r;
+}
+static const int c = (int8_t)255;
+
+[numthreads(1, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    G<2> g;
+    int tid = dispatchThreadID.x;
+    outputBuffer[tid] = f(g);
+}