[llvm] [HLSL] Fix Root signature test error (PR #127261)

[Justin Bogner via llvm-commits]

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@@ -186,9 +186,9 @@ PreservedAnalyses RootSignatureAnalysisPrinter::run(Module &M,
   OS << "Root Signature Definitions"
      << "\n";
   uint8_t Space = 0;
-  for (const auto &P : RSDMap) {
-    const auto &[Function, RSD] = P;
-    OS << "Definition for '" << Function->getName() << "':\n";
+  for (const auto &F : M) {
+    const auto RSD = RSDMap.at(&F);
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bogner wrote:

This will crash if there are functions in the module without root signatures (ie, if the root signature metadata isn't present, or if there are helper functions without their own root signatures)

https://github.com/llvm/llvm-project/pull/127261