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

[Justin Bogner via llvm-commits]

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@@ -60,21 +61,35 @@ struct ComputedShaderFlags {
     return FeatureFlags;
   }
 
-  static ComputedShaderFlags computeFlags(Module &M);
   void print(raw_ostream &OS = dbgs()) const;
   LLVM_DUMP_METHOD void dump() const { print(); }
 };
 
+using FuncShaderFlagsMask = std::pair<Function const *, ComputedShaderFlags>;
+using FunctionShaderFlagsVec = SmallVector<FuncShaderFlagsMask>;
+struct DXILModuleShaderFlagsInfo {
+  // Shader Flag mask representing module-level properties
+  ComputedShaderFlags ModuleFlags;
+  // Vector of Function-Shader Flag mask pairs representing properties of each
+  // of the functions in the module
+  FunctionShaderFlagsVec FuncShaderFlagsVec;
+
+  Expected<const ComputedShaderFlags &>
+  getShaderFlagsMask(const Function *Func) const;
+  bool hasShaderFlagsMask(const Function *Func) const;
+  void print(raw_ostream &OS = dbgs()) const;
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bogner wrote:

We shouldn't be defaulting the argument of `print()` to `dbgs()` (or anything really). We usually have a separate `dump()` method for access via a debugger

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