[llvm] [lang] Add support for multiple return statements in real function #4536
+110
−11
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Related issue = #602
For reviewers:
This PR inserts return instruction when visiting return statement in the codegen.
LLVM requires a basic block to have one and only one terminator instruction (return, branch, etc.) at the end of the block. So, this PR does the following things.
returned
in the codegen, indicating whether the current basic block has inserted a return instruction.returned
flag tofalse
when the current basic block completes.