[MLIR]Fix symbol table lookup

Author: frabert

mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp

@@ -308,7 +308,8 @@ convertOperationImpl(Operation &opInst, llvm::IRBuilderBase &builder,
         ftype = func->getFunctionType();
         callee = func;
       } else {
-        auto &st = moduleTranslation.symbolTable().getSymbolTable(callOp);
+        auto module = callOp->getParentOfType<ModuleOp>();
+        auto &st = moduleTranslation.symbolTable().getSymbolTable(module);
         auto alias = st.lookup<AliasOp>(attr.getValue());
         callee = moduleTranslation.lookupAlias(alias);
         ftype = llvm::cast<llvm::FunctionType>(moduleTranslation.convertType(alias.getAliasType()));
@@ -431,7 +432,8 @@ convertOperationImpl(Operation &opInst, llvm::IRBuilderBase &builder,
         ftype = func->getFunctionType();
         callee = func;
       } else {
-        auto &st = moduleTranslation.symbolTable().getSymbolTable(invOp);
+        auto module = invOp->getParentOfType<ModuleOp>();
+        auto &st = moduleTranslation.symbolTable().getSymbolTable(module);
         auto alias = st.lookup<AliasOp>(attr.getValue());
         callee = moduleTranslation.lookupAlias(alias);
         ftype = llvm::cast<llvm::FunctionType>(moduleTranslation.convertType(alias.getAliasType()));