Update comments now that LLVM PR3861 has been fixed. However, since conditionally removing the workaround makes the ABI dependent on LLVM version, I reconsidered that. (The same revision of LDC compiling for the same target should probably produce code that follows the same ABI, right?)

module internal.mem;

extern(C):

void* realloc(void*,size_t);
void free(void*);

void* _d_realloc(void* ptr, size_t n)
{
    return realloc(ptr, n);
}

void _d_free(void* ptr)
{
    free(ptr);
}