[llvm-bugs] [Bug 52067] New: Failure to compile __builtin_bcopy

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Oct 4 11:09:49 PDT 2021


            Bug ID: 52067
           Summary: Failure to compile __builtin_bcopy
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

#include <stddef.h>

void f(const void *s, void *d, size_t n)
    __builtin_bcopy((void *)s, d, n);

Trying to compile this with Clang results in this error:

<source>:5:5: error: cannot compile this builtin function yet
    __builtin_bcopy((void *)s, d, n);

I would assume implementing this is as simple as having it do
`__builtin_memmove(d, s, n)`, so it seems odd that this isn't implemented

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