[llvm] [DirectX] Infrastructure to collect shader flags for each function (PR #112967)

[Chris B via llvm-commits]

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@@ -63,20 +106,64 @@ void ComputedShaderFlags::print(raw_ostream &OS) const {
   OS << ";\n";
 }
 
+/// Get the combined shader flag mask of all module functions.
+const ComputedShaderFlags DXILModuleShaderFlagsInfo::getCombinedFlags() const {
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llvm-beanz wrote:

nit: a one-line function like this we should probably declare inline in the header so that it can be inlined at calls.

https://github.com/llvm/llvm-project/pull/112967