Updated some outdated documentation in the CLI and SPIR-V.rst and lib compiles now also allow fvk-invert-y.

Author: NielsbishereAlt

docs/SPIR-V.rst

@@ -4227,7 +4227,7 @@ codegen for Vulkan:
 - ``-fvk-use-dx-layout``: Uses DirectX layout rules for resources.
 - ``-fvk-invert-y``: Negates (additively inverts) SV_Position.y before writing
   to stage output. Used to accommodate the difference between Vulkan's
-  coordinate system and DirectX's. Only allowed in VS/DS/GS.
+  coordinate system and DirectX's. Only allowed in VS/DS/GS/MS/Lib.
 - ``-fvk-use-dx-position-w``: Reciprocates (multiplicatively inverts)
   SV_Position.w after reading from stage input. Used to accommodate the
   difference between Vulkan DirectX: the w component of SV_Position in PS is

include/dxc/Support/HLSLOptions.td

@@ -368,7 +368,7 @@ def fvk_bind_register : MultiArg<["-"], "fvk-bind-register", 4>, MetaVarName<"<t
   HelpText<"Specify Vulkan descriptor set and binding for a specific register">;
 def vkbr : MultiArg<["-"], "vkbr", 4>, Flags<[CoreOption, DriverOption]>, Alias<fvk_bind_register>;
 def fvk_invert_y: Flag<["-"], "fvk-invert-y">, Group<spirv_Group>, Flags<[CoreOption, DriverOption]>,
-  HelpText<"Negate SV_Position.y before writing to stage output in VS/DS/GS to accommodate Vulkan's coordinate system">;
+  HelpText<"Negate SV_Position.y before writing to stage output in VS/DS/GS/MS/Lib to accommodate Vulkan's coordinate system">;
 def fvk_use_dx_position_w: Flag<["-"], "fvk-use-dx-position-w">, Group<spirv_Group>, Flags<[CoreOption, DriverOption]>,
   HelpText<"Reciprocate SV_Position.w after reading from stage input in PS to accommodate the difference between Vulkan and DirectX">;
 def fvk_support_nonzero_base_instance: Flag<["-"], "fvk-support-nonzero-base-instance">, Group<spirv_Group>, Flags<[CoreOption, DriverOption]>,

tools/clang/lib/SPIRV/SpirvEmitter.cpp

@@ -604,8 +604,8 @@ SpirvEmitter::SpirvEmitter(CompilerInstance &ci)
     emitError("unknown shader module: %0", {}) << shaderModel->GetName();
 
   if (spirvOptions.invertY && !shaderModel->IsVS() && !shaderModel->IsDS() &&
-      !shaderModel->IsGS() && !shaderModel->IsMS())
-    emitError("-fvk-invert-y can only be used in VS/DS/GS/MS", {});
+      !shaderModel->IsGS() && !shaderModel->IsMS() && !shaderModel->IsLib())
+    emitError("-fvk-invert-y can only be used in VS/DS/GS/MS/Lib", {});
 
   if (spirvOptions.useGlLayout && spirvOptions.useDxLayout)
     emitError("cannot specify both -fvk-use-dx-layout and -fvk-use-gl-layout",