[llvm] [Exegesis] Do not assume the size and layout of the assembled snippet (PR #79636)

[Min-Yih Hsu via llvm-commits]

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@@ -365,11 +365,18 @@ Expected<ExecutableFunction> ExecutableFunction::create(
 
   auto SymbolSizes = object::computeSymbolSizes(*ObjectFileHolder.getBinary());
   // Get the size of the function that we want to call into (with the name of
-  // FunctionID). This should always be the third symbol returned by
-  // calculateSymbolSizes.
-  assert(SymbolSizes.size() == 3);
-  assert(cantFail(std::get<0>(SymbolSizes[2]).getName()) == FunctionID);
-  uintptr_t CodeSize = std::get<1>(SymbolSizes[2]);
+  // FunctionID).
+  auto SymbolIt = llvm::find_if(SymbolSizes, [&](const auto &Pair) {
+    auto SymbolName = Pair.first.getName();
+    if (SymbolName)
+      return *SymbolName == FunctionID;
+    // Suppress the error.
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mshockwave wrote:

Done

https://github.com/llvm/llvm-project/pull/79636