From 1343ab79fcd0ff9e5ffebbcf95414e51ab19e9cd Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 25 Jul 2024 11:49:07 -0700
Subject: Fix around extensions and `IDifferentiable` requirement synthesis. 
 (#4729)

* Check extensions before function parameters.
Fix decl ref formation for synthesized differentiable requirements that are inside an extension.

* Fix clang errors.

* More clang fix.

* Fix warnings.

* Fix build error.

* Fix.

* Fix typo.
---
 tests/bugs/extended-type-in-param.slang | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 tests/bugs/extended-type-in-param.slang

(limited to 'tests')

diff --git a/tests/bugs/extended-type-in-param.slang b/tests/bugs/extended-type-in-param.slang
new file mode 100644
index 000000000..b3631d36e
--- /dev/null
+++ b/tests/bugs/extended-type-in-param.slang
@@ -0,0 +1,28 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv
+struct ArrayLike<T>
+{
+}
+__generic<T : IDifferentiable>
+extension ArrayLike<T> : IDifferentiable
+{
+}
+
+struct ExpectsDiff<T : IDifferentiable>
+{
+}
+
+// test that using `ExpectsDiff<ArrayLike<T>>` is fine to the type system.
+// this means that we must have checked the extension for `ArrayLike<T>` before
+// we check the `t3` parameter for `test`.
+void test<T : IDifferentiable>(ExpectsDiff<ArrayLike<T>> t3)
+{
+}
+
+// CHECK: OpEntryPoint
+
+[numthreads(1, 1, 1)]
+void main()
+{
+    ExpectsDiff<ArrayLike<float>> v = {};
+    test<float>(v);
+}
\ No newline at end of file
-- 
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