================
@@ -174,21 +176,45 @@ createBufferHandleType(const HLSLBufferDecl *BufDecl) {
return cast<HLSLAttributedResourceType>(QT.getTypePtr());
}
+// Iterates over all declarations in the HLSL buffer and based on the
+// packoffset or register(c#) annotations it fills outs the Layout
+// vector with the user-specified layout offsets.
+// The buffer offsets can be specified 2 ways:
+// 1. declarations in cbuffer {} block can have a packoffset annotation
+// (translates to HLSLPackOffsetAttr)
+// 2. default constant buffer declarations at global scope can have
+// register(c#) annotations (translates to HLSLResourceBindingAttr with
+// RegisterType::C)
+// It is not guaranteed that all declarations in a buffer have an annotation.
+// For those where it is not specified a -1 value is added to the Layout
+// vector. In the final layout these declarations will be placed at the end
+// of the HLSL buffer after all of the elements with specified offset.
static void fillPackoffsetLayout(const HLSLBufferDecl *BufDecl,
- SmallVector<unsigned> &Layout) {
+ SmallVector<int32_t> &Layout) {
assert(Layout.empty() && "expected empty vector for layout");
assert(BufDecl->hasValidPackoffset());
- for (Decl *D : BufDecl->decls()) {
+ for (Decl *D : BufDecl->buffer_decls()) {
----------------
alsepkow wrote:
nit: On formatting, it sounds like the llvm repo prefers 'auto *name' for for
loops?
https://github.com/llvm/llvm-project/pull/128991
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