Implement 8.14-8.19 of OpenGL-GLSL specification

The following PR implements 8.14-8.19 of the [OpenGL-GLSL specification](https://registry.khronos.org/OpenGL/specs/gl/GLSLangSpec.4.60.pdf).

Fully implements all functions and built-in type's, resolves https://github.com/shader-slang/slang/issues/3692 for GLSL & SPRI-V targets.

_Notes:_
Testing Tools:
* Fragment shaders cannot test computational results. Only OpCodes are checked for proper emitting.

Implementation Notes:
* SubpassInput requires an unknown image format.
* SubpassInput is disjoint from TextureType: __SubpassImpl (.slang) & SubpassInputType (Compiler) to reduce code generation required.
* SubpassInput required an additional input layout modifier, input_attachment_index, this was added as a new parameter binding attribute. Since the following qualifiers can overlap with different resources (`layout(input_attachment_index = 0, binding = 0, set = 0)`) input_attachment_index is checked for overlapping resource bindings separately from other qualifiers with `LayoutResourceKind::InputAttachmentIndex`.
* `GLSLInputAttachmentIndexLayoutModifier` was added to enforce function parameters only accepting `in` decorated variables.
* `in` decorated variables needed to have emitting modified to allow directly emitting the variable into function calls if used as a parameter, normally Slang has a "global variable" shadow as a "global parameter" through a copy. This does not work and is solved using `GlobalVariableShadowingGlobalParameterDecoration` to build a relationship of "global variable" to "global parameter", we then resolve this relationship and replace "global variable" uses later in compile.
* `AtomicCounterMemory` memory-constraint requires `OpCapability AtomicStorage`, `AtomicStorage` is invalid for Vulkan targets. glslang outputs for `barrier`, `memoryBarrier`, and `groupMemoryBarrier` `AtomicCounterMemory` as a memory constraint. This compiles as valid SPIR-V for Vulkan since `OpCapability AtomicStorage` is not declared. This behavior of glslang is undefined as per [3.31.Capability of the SPIR-V specification](https://registry.khronos.org/SPIR-V/specs/unified1/SPIRV.html#_capability). We will omit `AtomicCounterMemory` from our barrier calls.

1 files changed, 3 insertions, 2 deletions

diff --git a/source/slang/slang-ir-any-value-marshalling.cpp b/source/slang/slang-ir-any-value-marshalling.cpp
index 200f8bc55..13059a84a 100644
--- a/source/slang/slang-ir-any-value-marshalling.cpp
+++ b/source/slang/slang-ir-any-value-marshalling.cpp
@@ -4,6 +4,7 @@
 #include "slang-ir-generics-lowering-context.h"
 #include "slang-ir.h"
 #include "slang-ir-insts.h"
+#include "slang-legalize-types.h"
 
 namespace Slang
 {
@@ -223,7 +224,7 @@ namespace Slang
                 break;
             }
             default:
-                if (as<IRTextureTypeBase>(dataType) || as<IRSamplerStateTypeBase>(dataType))
+                if (isResourceType(dataType))
                 {
                     context->marshalResourceHandle(builder, dataType, concreteTypedVar);
                     return;
@@ -855,7 +856,7 @@ namespace Slang
             return alignUp(offset, 4) + alignUp((SlangInt)anyValueSize, 4);
         }
         default:
-            if (as<IRTextureTypeBase>(type) || as<IRSamplerStateTypeBase>(type))
+            if (isResourceType(type))
             {
                 return alignUp(offset, 4) + 8;
             }