From 35f8e092f2aa3ed5e3cf03387e712f798ff4850e Mon Sep 17 00:00:00 2001 From: Julius Ikkala Date: Thu, 21 Aug 2025 08:47:18 +0300 Subject: Introduce CDataLayout & -fvk-use-c-layout (#8136) Closes #8112. ~~The issue asks for a "C layout", but in this PR I use the term "CPU layout" because this naming was pre-existing in the codebase as `kCPULayoutRulesImpl_`. The primary purpose of this layout is to match CPU-side struct definitions with the shader side. I'm open to better naming suggestions, though.~~ Edit: switched back to using `CDataLayout` & `-fvk-use-c-layout`, as the CPU target depends on the object layout rules of existing CPU layout rules, but they're incompatible with actual shaders. So a new `kCLayoutRulesImpl_` was needed anyway. --------- Co-authored-by: Ellie Hermaszewska --- source/slang/slang-ir-layout.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'source/slang/slang-ir-layout.h') diff --git a/source/slang/slang-ir-layout.h b/source/slang/slang-ir-layout.h index 1918f31b6..a0f144c86 100644 --- a/source/slang/slang-ir-layout.h +++ b/source/slang/slang-ir-layout.h @@ -56,6 +56,12 @@ struct IRTypeLayoutRules public: IRTypeLayoutRuleName ruleName; + /// This function calculates the size and alignment of the given type. + virtual Result calcSizeAndAlignment( + CompilerOptionSet& optionSet, + IRType* type, + IRSizeAndAlignment* outSizeAndAlignment); + /// Align composite based on rule. Type is aligned assuming /// it is apart of a composite (array, struct, matrix, etc...) virtual IRSizeAndAlignment alignCompositeElement(IRSizeAndAlignment elementSize) = 0; @@ -79,6 +85,7 @@ public: static IRTypeLayoutRules* getStd430(); static IRTypeLayoutRules* getStd140(); static IRTypeLayoutRules* getNatural(); + static IRTypeLayoutRules* getC(); static IRTypeLayoutRules* getConstantBuffer(); static IRTypeLayoutRules* get(IRTypeLayoutRuleName name); }; -- cgit v1.2.3