Support for `[[vk::spirv_instruction(op)]]` (#2242)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Add extension required by SPIRVOpDecoration into part of emit (could be a prior pass).

* Add [[vk::spirv_instruction]] attribute

* Add documentation for [[vk::spirv_instruction].

* Update 08-attributes.md

* Update 08-attributes.md

1 files changed, 6 insertions, 0 deletions

diff --git a/source/slang/slang-lower-to-ir.cpp b/source/slang/slang-lower-to-ir.cpp
index 585b02a02..4ff43b697 100644
--- a/source/slang/slang-lower-to-ir.cpp
+++ b/source/slang/slang-lower-to-ir.cpp
@@ -7517,6 +7517,12 @@ struct DeclLoweringVisitor : DeclVisitor<DeclLoweringVisitor, LoweredValInfo>
             getBuilder()->addDecoration(irFunc, kIROp_OutputControlPointsDecoration, intLit);
         }
 
+        if (auto attr = decl->findModifier<SPIRVInstructionOpAttribute>())
+        {
+            IRIntLit* intLit = _getIntLitFromAttribute(getBuilder(), attr);
+            getBuilder()->addDecoration(irFunc, kIROp_SPIRVOpDecoration, intLit);
+        }
+
         if(decl->findModifier<UnsafeForceInlineEarlyAttribute>())
         {
             getBuilder()->addDecoration(irFunc, kIROp_UnsafeForceInlineEarlyDecoration);