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...xtended. This is regardless of translation unit where the callee is in. >No, because the callee and caller may be in different translation units. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20080519/39d4e072/attachment.html>

But they both follow the same calling convention. There are two possibilities in the caller: 1) Call node returns sizeof(int) or larger: in this case there is no truncation. 2) Call node returns smaller than sizeof(int): in this case callee always has to return an int so it has to consistently either sign extend or zero extend because int is either signed or unsigned consistently for that port.