David Majnemer 8b51260274 Fix std::make_heap's worst case time complexity ...

std::make_heap is currently implemented by iteratively applying a
siftup-type algorithm.  Since sift-up is O(ln n), this gives
std::make_heap a worst case time complexity of O(n ln n).

The C++ standard mandates that std::make_heap make no more than O(3n)
comparisons, this makes our std::make_heap out of spec.

Fix this by introducing an implementation of __sift_down and switch
std::make_heap to create the heap using it.
This gives std::make_heap linear time complexity in the worst case.

This fixes PR20161.

llvm-svn: 213615

2014-07-22 06:07:09 +00:00

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algorithms

Fix std::make_heap's worst case time complexity

2014-07-22 06:07:09 +00:00

atomics

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containers

Fix some failing tests for the standard containers. The tests were failing in 32-bit mode because they assumed that std::size_type and make_unsigned<ptrdiff_t>::type were always the same type. No change to libc++, just the tests.

2014-07-08 15:19:40 +00:00

depr

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diagnostics

Linux: Correctly identify valid error codes

2014-05-29 05:02:22 +00:00

experimental

[libcxx] Add <experimental/utility> header for LFTS.

2014-07-17 05:31:31 +00:00

extensions

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input.output

Remove unused code in a libc++ test.

2014-06-02 12:00:08 +00:00

iterators

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language.support

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localization

Fix warning in test - missing exception specifier for overload of operator new

2014-07-10 15:19:50 +00:00

numerics

[libc++] Don't return uninitialized data from random_device::operator()

2014-06-03 02:40:39 +00:00

re

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strings

Fix bug #20335 - memory leak when move-constructing a string with unequal allocator. Thanks to Thomas Koeppe for the report

2014-07-17 15:32:20 +00:00

support

Add a reset method to the counting predicates in the test suite

2014-07-09 21:04:22 +00:00

thread

Handle partial nanosleeps in this_thread::sleep_for

2014-06-04 19:43:20 +00:00

utilities

Correctly implement LWG 2049; std::is_destructible.

2014-07-16 15:51:50 +00:00

CMakeLists.txt

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lit.cfg

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lit.site.cfg.in

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nothing_to_do.pass.cpp

Test commit: Reverting whitespace changes

2014-07-17 05:10:03 +00:00

testit

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