[llvm-bugs] [Bug 46735] New: __builtin___mempcpy_chk to direct call to mempcpy

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46735

            Bug ID: 46735
           Summary: __builtin___mempcpy_chk to direct call to mempcpy
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: llvm-bugs at lists.llvm.org

void* f(void *d, const void *s, size_t l)
{
    return __builtin___mempcpy_chk(d, s, l, __builtin_object_size(d, 0));
}

This can be optimized to `return mempcpy(d, s, l);`. This optimization is done
by GCC, but not by LLVM.

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