[llvm] [DXIL][Analysis] Add validator version to info collected by Module Metadata Analysis (PR #104828)

[Brian Favela via llvm-commits]

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@@ -25,6 +25,14 @@ static ModuleMetadataInfo collectMetadataInfo(Module &M) {
   MMDAI.DXILVersion = TT.getDXILVersion();
   MMDAI.ShaderModelVersion = TT.getOSVersion();
   MMDAI.ShaderStage = TT.getEnvironment();
+  NamedMDNode *ValidatorVerNode = M.getNamedMetadata("dx.valver");
+  if (ValidatorVerNode) {
+    auto *ValVerMD = cast<MDNode>(ValidatorVerNode->getOperand(0));
+    auto *MajorMD = mdconst::extract<ConstantInt>(ValVerMD->getOperand(0));
+    auto *MinorMD = mdconst::extract<ConstantInt>(ValVerMD->getOperand(1));
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bfavela wrote:

Should there be a check if the tuple isn't well formed, or is there a separate place that's already checked?
AFAIK, there's nothing that guarantees someone couldn't form a bad metadata header, which shouldn't be accidentally evaluated.

https://github.com/llvm/llvm-project/pull/104828