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SelectionDAGBuilder recognizes libfuncs using some homegrown parameter type-checking. Use TLI instead, removing another heap of redundant code. This isn't strictly NFC, as the SDAG code was too lax. Concretely, this means changes are required to two tests: - calling a non-variadic function via a variadic prototype isn't OK; it just happens to work on x86_64 (but not on, e.g., aarch64). - mempcpy has a size_t parameter; the SDAG code accepts any integer type, which meant using i32 on x86_64 worked. I don't think it's worth supporting either of these (IMO) broken testcases. Instead, fix them to be more correct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292189 91177308-0d34-0410-b5e6-96231b3b80d8
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