Chandler Carruth 585de7a1b1 Add support to the alignment support header for conjuring a character ... array of a suitable size and alignment for any of a number of different types to be stored into the character array. The mechanisms for producing an explicitly aligned type are fairly complex because this operation is poorly supported on all compilers. We've spent a fairly significant amount of time experimenting with different implementations inside of Google, and the one using explicitly expanded templates has been the most robust. Credit goes to Nick Lewycky for writing the first 20 versions or so of this logic we had inside of Google. I based this on the only one to actually survive. In case anyone is worried, yes we are both explicitly re-contributing and re-licensing it for LLVM. =] Once the issues with actually specifying the alignment are finished, it turns out that most compilers don't in turn align anything the way they are instructed. Testing of this logic against both Clang and GCC indicate that the alignment constraints are largely ignored by both compilers! I've come up with and used a work-around by wrapping each alignment-hinted type directly in a struct, and using that struct to align the character array through a union. This elaborate hackery is terrifying, but I've included testing that caught a terrifying number of bugs in every other technique I've tried. All of this in order to implement a poor C++98 programmers emulation of C++11 unrestricted unions in classes such as SmallDenseMap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158597 91177308-0d34-0410-b5e6-96231b3b80d8		2012-06-16 08:52:57 +00:00
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AlignOfTest.cpp	Add support to the alignment support header for conjuring a character	2012-06-16 08:52:57 +00:00
AllocatorTest.cpp	BumpPtrAllocator: Make sure threshold cannot be initialized with a value smaller than the slab size.	2012-03-01 22:10:16 +00:00
BlockFrequencyTest.cpp	Implement comparison operators for BranchProbability in a way that can't overflow INT64_MAX.	2011-10-24 13:50:56 +00:00
Casting.cpp	unittests/Support/Casting.cpp: [PR8226] Workaround for MSVC|Debug.	2012-01-22 12:14:35 +00:00
CommandLineTest.cpp	Fix a compile failure introduced by r82675 on MinGW which doesn't have	2009-09-25 21:07:20 +00:00
ConstantRangeTest.cpp	fix corner case in ConstantRange::intersectWith().	2012-05-18 00:14:36 +00:00
DataExtractorTest.cpp	unittests/Support/DataExtractorTest.cpp: Specify ULL explicitly to a few constants.	2011-09-13 23:23:49 +00:00
EndianTest.cpp	Merge System into Support.	2010-11-29 18:16:10 +00:00
IntegersSubsetTest.cpp	IntegersSubsetMapping: added exclude operation, that allows to exclude subset of integers from current mapping.	2012-06-05 07:57:36 +00:00
IRBuilderTest.cpp	Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch	2011-12-20 02:50:00 +00:00
LeakDetectorTest.cpp	Fix death tests in -Asserts builds.	2010-03-17 01:18:45 +00:00
Makefile	Minimal raw_ostream unit tests	2009-03-17 16:14:59 +00:00
ManagedStatic.cpp	Fix Windows build, don't try to #include <pthread.h> when we know it's not	2011-11-14 22:10:23 +00:00
MathExtrasTest.cpp	Fixes warnings emitted by Visual Studio 2010 compiler.	2011-03-01 23:11:57 +00:00
MDBuilderTest.cpp	Remove support for the special 'fast' value for fpmath accuracy for the moment.	2012-04-16 19:39:33 +00:00
Path.cpp	Revert r146363 to allow buildbots to make forward progress.	2011-12-12 17:58:31 +00:00
raw_ostream_test.cpp	Add raw_ostream::write_escaped, for writing escaped strings.	2009-10-17 20:43:08 +00:00
RegexTest.cpp	Add Regex::sub, for doing regular expression substitution with backreferences.	2010-02-17 20:08:42 +00:00
SwapByteOrderTest.cpp	Merge System into Support.	2010-11-29 18:16:10 +00:00
TimeValue.cpp	unittests: Merge SystemTests back into SupportTests.	2010-11-29 22:29:04 +00:00
TypeBuilderTest.cpp	Round 2 of dead private variable removal.	2012-06-06 19:47:08 +00:00
ValueHandleTest.cpp	Change all self assignments X=X to (void)X, so that we can turn on a	2010-12-23 00:58:24 +00:00
YAMLParserTest.cpp	Add YAML parser to Support.	2012-04-03 23:09:22 +00:00