Support for Payload Access Qualifiers (#3448) (#6595)

* Add support for Ray Payload Access Qualifiers (PAQs) (#3448)

- Added [raypayload] attribute for struct declarations
- Implemented field validation requiring read/write access qualifiers
- Added diagnostic error for missing qualifiers
- Enabled PAQs in DXC compiler and HLSL emission
- Added new test demonstrating PAQ syntax
- Implemented proper handling of ray payload attributes in IR generation

* format code

* Cleanup: Remove unused vars

* Add check to enablePAQ only for profile >= lib_6_7

* Review Fix - Add PAQ support for DX Raytracing

add enablePAQ flag to DownstreamCompileOpitons, improve PAQ handling
update raypayload-attribute-paq.slang to ensure hlsl and dxil is
validated

* Add diagnostic test for missing paq for lib_6_7

Compile using `-disable-payload-qualifiers` aka lib_6_6 profile
raypayload-attribute-no-struct.slang and
raypayload-attribute.slang

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/tests/hlsl/raypayload-attribute-no-struct.slang b/tests/hlsl/raypayload-attribute-no-struct.slang
index c7ad94593..4e4921e14 100644
--- a/tests/hlsl/raypayload-attribute-no-struct.slang
+++ b/tests/hlsl/raypayload-attribute-no-struct.slang
@@ -1,7 +1,8 @@
-//enable when https://github.com/shader-slang/slang/issues/3448 is implemented
-//DISABLE_TEST:SIMPLE(filecheck=CHECK): -target hlsl -stage raygeneration -entry rayGenShaderA
+//TEST:SIMPLE(filecheck=CHECK): -target hlsl -profile lib_6_6 -stage raygeneration -entry rayGenShaderA
+//TEST:SIMPLE(filecheck=DXIL): -target dxil -profile lib_6_6 -stage raygeneration -entry rayGenShaderA
 
-// CHECK: struct [raypayload]
+// CHECK: struct RayPayload
+// DXIL: define void @
 
 uniform RWTexture2D resultTexture;
 uniform RaytracingAccelerationStructure sceneBVH;