[clang] [llvm] [clang][WebAssembly] Support reftypes & varargs in test_function_pointer_signature (PR #150921)

[Hood Chatham via cfe-commits]

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@@ -246,35 +246,26 @@ Value 
*CodeGenFunction::EmitWebAssemblyBuiltinExpr(unsigned BuiltinID,
     llvm::FunctionType *LLVMFuncTy =
         cast<llvm::FunctionType>(ConvertType(QualType(FuncTy, 0)));
 
+    bool VarArg = LLVMFuncTy->isVarArg();
     unsigned NParams = LLVMFuncTy->getNumParams();
     std::vector<Value *> Args;
-    Args.reserve(NParams + 3);
+    Args.reserve(NParams + 3 + VarArg);
----------------
hoodmane wrote:

Okay added Sema checks for this.

https://github.com/llvm/llvm-project/pull/150921
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