Add option to preserve shader parameter declaration in output SPIRV. (#4344)

* Add option to preserve shader parameter declarations in output.

* Add test.

1 files changed, 1 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index ce659b007..d807efec4 100644
--- a/slang.h
+++ b/slang.h
@@ -865,6 +865,7 @@ extern "C"
             MinimumSlangOptimization, // bool
             DisableNonEssentialValidations, // bool
             DisableSourceMap,       // bool
+            PreserveParameters,       // bool: preserve all resource parameters in the output code.
 
             // Target