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4 Commits

Author SHA1 Message Date
David Majnemer c2406d46b8 [Sema] Don't artificially forbid BuiltinTemplateDecls in CheckTemplateArgument 
After thinking about it, we don't really need to forbid
BuiltinTemplateDecls explicitly.  The restriction doesn't really buy us
anything.

llvm-svn: 275078
 2016-07-11 17:09:56 +00:00
David Majnemer f580dd98cb [Sema] Disallow __make_integer_seq from showing up in __make_integer_seq 
We hit over stringent asserts when trying to diagnose.  Loosen them as
appropriate.

This fixes PR28494.

llvm-svn: 275047
 2016-07-11 05:59:24 +00:00
David Majnemer 5088cdf4d1 [Lex] Add __has_builtin support for __make_integer_seq 
Differential Revision: http://reviews.llvm.org/D14349

llvm-svn: 252115
 2015-11-05 01:01:47 +00:00
David Majnemer d9b1a4fb71 [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

llvm-svn: 252036
 2015-11-04 03:40:30 +00:00