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, 8 insertions, 0 deletions

diff --git a/tests/diagnostics/raypayload-missing-access-qualifiers.slang.expected b/tests/diagnostics/raypayload-missing-access-qualifiers.slang.expected
new file mode 100644
index 000000000..525e8529c
--- /dev/null
+++ b/tests/diagnostics/raypayload-missing-access-qualifiers.slang.expected
@@ -0,0 +1,8 @@
+result code = -1
+standard error = {
+tests/diagnostics/raypayload-missing-access-qualifiers.slang(10): error 40000: field 'colorMissingQualifiers' in ray payload struct must have either 'read' OR 'write' access qualifiers
+    float4 colorMissingQualifiers; // Error expected here
+           ^~~~~~~~~~~~~~~~~~~~~~
+}
+standard output = {
+}