Initial -embed-spirv support (#4974)

* Initial -embed-spirv support

Add support for SPIR-V precompilation using the framework
established for DXIL.

Work on #4883

* SLANG_UNUSED

* Add linkage attributes to exported spirv functions

* Combine DXIL and SPIRV paths

* Whitespace fix

* Merge remaining precompiled spirv/dxil paths

* Change inst accessors to return codegentarget

* Add unit test for precompiled spirv

---------

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

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/library/precompiled-spirv-generics.slang b/tests/library/precompiled-spirv-generics.slang
new file mode 100644
index 000000000..a55f58513
--- /dev/null
+++ b/tests/library/precompiled-spirv-generics.slang
@@ -0,0 +1,28 @@
+// precompiled-spirv-generics.slang
+
+// A test that uses slang-modules with embedded precompiled SPIRV and a library containing generics.
+// The test compiles a library slang (export-library-generics.slang) with -embed-downstream-ir then links the
+// library to entrypoint slang (this file).
+// The test passes if there is no errror thrown.
+// TODO: Check if final linkage used only the precompiled spirv.
+
+//TEST:COMPILE: tests/library/export-library-generics.slang -o tests/library/export-library-generics.slang-module -target spirv -embed-downstream-ir -profile lib_6_6 -incomplete-library
+//TEST:COMPILE: tests/library/precompiled-spirv-generics.slang -target spirv -stage anyhit -entry anyhit -o tests/library/linked.spirv
+
+import "export-library-generics";
+
+struct Payload
+{
+    int val;
+}
+
+struct Attributes
+{
+    float2 bary;
+}
+
+[shader("anyhit")]
+void anyhit(inout Payload payload, Attributes attrib)
+{
+    payload.val = normalFunc(x * y) + normalFuncUsesGeneric(y);
+}