shared_ptr<T[]> not constructible from a pointer

[llvmbot]

Bugzilla Link	44592
Resolution	FIXED
Resolved on	May 14, 2020 11:52
Version	unspecified
OS	Windows NT
Reporter	LLVM Bugzilla Contributor
CC	@mclow,@zoecarver

Extended Description

From StackOverflow (https://stackoverflow.com/q/59813395/2069064), this program:

#include

std::shared_ptr<int[]> sp(new int[3]);

fails to compile with, complaining about no matching constructor. But it should work, and works on libstdc++.

[llvmbot]

assigned to @zoecarver

[llvmbot]

no error or warning on godbolt:
https://godbolt.org/z/KDf8ze

[mclow]

if you add -stdlib=libc++ on that godbolt link you'll see the error.
We're missing a bunch of shared_ptr functionality in libc++

[zoecarver]

Fixed by: https://reviews.llvm.org/D62259