[PATCH] D16360: unordered_map: Avoid unnecessary mallocs when no insert occurs

[Duncan P. N. Exon Smith via cfe-commits]

dexonsmith updated this revision to Diff 45758.
dexonsmith added a comment.

Committed r258511 and r258575 as preps.  Updated patch addresses review comments (and skips the trivially constructible parts).


http://reviews.llvm.org/D16360

Files:
  include/__hash_table
  include/unordered_map
  test/libcxx/containers/unord/unord.map/insert_dup_alloc.pass.cpp

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