[LLVM] Codegen subroutine call when CallNode::op is GlobalVar#14901

masahi merged 3 commits intoapache:mainapache/tvm:mainfrom

Lunderberg:llvm_codegen_subroutine_in_same_irmoduleLunderberg/tvm:llvm_codegen_subroutine_in_same_irmoduleCopy head branch name to clipboard