Support SV_DispatchThreadID attribute.
Translate it into dx.thread.id in clang codeGen.
Reviewed By: beanz, aaron.ballman
Differential Revision: https://reviews.llvm.org/D133983
The resource binding attribute is to set the virtual registers and logical register spaces resources in HLSL are bound to.
Format is ''register(ID, space)'' like register(t3, space1).
ID must be start with
t – for shader resource views (SRV),
s – for samplers,
u – for unordered access views (UAV),
b – for constant buffer views (CBV).
Register space is default to space0.
The full documentation is available here: https://docs.microsoft.com/en-us/windows/win32/direct3d12/resource-binding-in-hlsl
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D130033
This is first part for support cbuffer/tbuffer.
The format for cbuffer/tbuffer is
BufferType [Name] [: register(b#)] { VariableDeclaration [: packoffset(c#.xyzw)]; ... };
More details at https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-constants
New keyword 'cbuffer' and 'tbuffer' are added.
New AST node HLSLBufferDecl is added.
Build AST for simple cbuffer/tbuffer without attribute support.
The special thing is variables declared inside cbuffer is exposed into global scope.
So isTransparentContext should return true for HLSLBuffer.
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D129883
HLSL has a language feature called Semantics which get attached to
declarations like attributes and are used in a variety of ways.
One example of semantic use is here with the `SV_GroupIndex` semantic
which, when applied to an input for a compute shader is pre-populated
by the driver with a flattened thread index.
Differential Revision: https://reviews.llvm.org/D122699
# Conflicts:
# clang/include/clang/Basic/Attr.td
# clang/include/clang/Basic/AttrDocs.td
Xiang Li