Allow Link time constant array length sizing, warn on unsupported functionality (#7067)

* Add link time array layout test

* Add link time constant array size compilation test

* Link time constant array size test

* Allow getting link time array size

Closes https://github.com/shader-slang/slang/issues/6753

* format

* Switch to SIMPLE test and check output

* Implement without binary api changes

* diagnose on link time constant sized array

* fix test

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/slang-deprecated.h b/include/slang-deprecated.h
index 2ae91c6d8..f210e8c48 100644
--- a/include/slang-deprecated.h
+++ b/include/slang-deprecated.h
@@ -478,9 +478,19 @@ extern "C"
 
     If the size of a type cannot be statically computed, perhaps because it depends on
     a generic parameter that has not been bound to a specific value, this function returns zero.
+
+    Use spReflectionType_GetSpecializedElementCount if the size is dependent on
+    a link time constant
     */
     SLANG_API size_t spReflectionType_GetElementCount(SlangReflectionType* type);
 
+    /** The same as spReflectionType_GetElementCount except it takes into account specialization
+     * information from the given reflection info
+     */
+    SLANG_API size_t spReflectionType_GetSpecializedElementCount(
+        SlangReflectionType* type,
+        SlangReflection* reflection);
+
     SLANG_API SlangReflectionType* spReflectionType_GetElementType(SlangReflectionType* type);
 
     SLANG_API unsigned int spReflectionType_GetRowCount(SlangReflectionType* type);