[Sema] Implement __make_integer_seq

Description

[Sema] Implement __make_integer_seq

This new builtin template allows for incredibly fast instantiations of
templates like std::integer_sequence.

Performance numbers follow:
My work station has 64 GB of ram + 20 Xeon Cores at 2.8 GHz.

__make_integer_seq<std::integer_sequence, int, 90000> takes 0.25
seconds.

std::make_integer_sequence<int, 90000> takes unbound time, it is still
running. Clang is consuming gigabytes of memory.

Differential Revision: http://reviews.llvm.org/D13786

Details

Committed
majnemerNov 3 2015, 7:40 PM
Differential Revision
D13786: [Sema] Implement __make_integer_seq
Parents
rL252035: Option letter o was already in use; use an uppercase E instead
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