Fix tuple AST & IR layout size queries (#7502)

* Fix tuple AST & IR layout size queries

* Don't peephole sizeof if size is still indeterminate

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/hlsl-intrinsic/size-of/size-of-tuple.slang b/tests/hlsl-intrinsic/size-of/size-of-tuple.slang
new file mode 100644
index 000000000..2c7d18e71
--- /dev/null
+++ b/tests/hlsl-intrinsic/size-of/size-of-tuple.slang
@@ -0,0 +1,48 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cpu -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-slang -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-slang -compute -dx12 -shaderobj
+//TEST(compute, vulkan):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cuda -compute -shaderobj
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0], stride=4):out,name outputBuffer
+
+RWStructuredBuffer<int> outputBuffer;
+
+struct Thing<each T>
+{
+    int val;
+    Tuple<expand each T> tuple;
+};
+
+int tupleSize1<T>(T vals)
+{
+    return sizeof(Tuple<T>);
+}
+
+int tupleSize2<each T>(T vals)
+{
+    return sizeof(Tuple<expand each T>);
+}
+
+int tupleSize3<each T>(T vals)
+{
+    return sizeof(Tuple<int, expand each T>);
+}
+
+int tupleSize4<each T>(T vals)
+{
+    return sizeof(Thing<expand each T>);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    outputBuffer[0] = tupleSize2(); // CHECK: 0
+    outputBuffer[1] = tupleSize3(); // CHECK-NEXT: 4
+    outputBuffer[2] = tupleSize4(); // CHECK-NEXT: 4
+
+    outputBuffer[3] = tupleSize1(1); // CHECK-NEXT: 4
+    outputBuffer[4] = tupleSize2(1,2); // CHECK-NEXT: 8
+    outputBuffer[5] = tupleSize3(1,2,3); // CHECK-NEXT: 10
+    outputBuffer[6] = tupleSize4(1,2,3,4); // CHECK-NEXT: 14
+}