[libcxx] r322039 - Revert "Make rehash(0) work with ubsan's unsigned-integer-overflow."

[Dan Albert via cfe-commits]

Author: danalbert
Date: Mon Jan  8 14:57:12 2018
New Revision: 322039

URL: http://llvm.org/viewvc/llvm-project?rev=322039&view=rev
Log:
Revert "Make rehash(0) work with ubsan's unsigned-integer-overflow."

Seems to have broken some tests since I first wrote this a while
back. Will reland after checking what went wrong with the tests.

This reverts commit 7023194c8d11a081fd01ed25308b3d60193c6a06.

Modified:
    libcxx/trunk/include/__hash_table

Modified: libcxx/trunk/include/__hash_table
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__hash_table?rev=322039&r1=322038&r2=322039&view=diff
==============================================================================
--- libcxx/trunk/include/__hash_table (original)
+++ libcxx/trunk/include/__hash_table Mon Jan  8 14:57:12 2018
@@ -2136,7 +2136,7 @@ template <class _Tp, class _Hash, class
 void
 __hash_table<_Tp, _Hash, _Equal, _Alloc>::rehash(size_type __n)
 {
-    if (__n < 2)
+    if (__n == 1)
         __n = 2;
     else if (__n & (__n - 1))
         __n = __next_prime(__n);