Chandler Carruth 1c8db50a9a Port the SSAUpdater-based promotion logic from the old SROA pass to the ... new one, and add support for running the new pass in that mode and in that slot of the pass manager. With this the new pass can completely replace the old one within the pipeline. The strategy for enabling or disabling the SSAUpdater logic is to do it by making the requirement of the domtree analysis optional. By default, it is required and we get the standard mem2reg approach. This is usually the desired strategy when run in stand-alone situations. Within the CGSCC pass manager, we disable requiring of the domtree analysis and consequentially trigger fallback to the SSAUpdater promotion. In theory this would allow the pass to re-use a domtree if one happened to be available even when run in a mode that doesn't require it. In practice, it lets us have a single pass rather than two which was simpler for me to wrap my head around. There is a hidden flag to force the use of the SSAUpdater code path for the purpose of testing. The primary testing strategy is just to run the existing tests through that path. One notable difference is that it has custom code to handle lifetime markers, and one of the tests has been enhanced to exercise that code. This has survived a bootstrap and the test suite without serious correctness issues, however my run of the test suite produced *very* alarming performance numbers. I don't entirely understand or trust them though, so more investigation is on-going. To aid my understanding of the performance impact of the new SROA now that it runs throughout the optimization pipeline, I'm enabling it by default in this commit, and will disable it again once the LNT bots have picked up one iteration with it. I want to get those bots (which are much more stable) to evaluate the impact of the change before I jump to any conclusions. NOTE: Several Clang tests will fail because they run -O3 and check the result's order of output. They'll go back to passing once I disable it again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163965 91177308-0d34-0410-b5e6-96231b3b80d8		2012-09-15 11:43:14 +00:00
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ArgumentPromotion.cpp	Replace some explicit compare loops with std::equal.	2012-07-19 10:46:05 +00:00
CMakeLists.txt	llvm/lib: [CMake] Add explicit dependency to intrinsics_gen.	2012-06-24 13:32:01 +00:00
ConstantMerge.cpp	Re-fix the issue Bill fixed in r147899 in a slightly different way, which doesn't abuse the semantics of linker_private. We don't really want to merge any string constant with a weak_odr global.	2012-01-11 22:06:46 +00:00
DeadArgumentElimination.cpp	switch AttrListPtr::get to take an ArrayRef, simplifying a lot of clients.	2012-05-28 01:47:44 +00:00
ExtractGV.cpp	Remove tabs.	2012-07-19 00:11:40 +00:00
FunctionAttrs.cpp	SCCCaptured is trivially false on entry to this loop and not modified inside it.	2012-01-05 22:21:45 +00:00
GlobalDCE.cpp	Implement the isSafeToDiscardIfUnused predicate and use it in globalopt and	2012-06-14 22:48:13 +00:00
GlobalOpt.cpp	Make MemoryBuiltins aware of TargetLibraryInfo.	2012-08-29 15:32:21 +00:00
InlineAlways.cpp	Fix a pretty scary bug I introduced into the always inliner with	2012-04-01 10:21:05 +00:00
Inliner.cpp	Fix an 80 char line limit.	2012-09-13 16:27:32 +00:00
InlineSimple.cpp	Remove a bunch of empty, dead, and no-op methods from all of these	2012-03-31 12:48:08 +00:00
Internalize.cpp	Add a Fixme.	2012-04-16 04:23:52 +00:00
IPConstantPropagation.cpp	land David Blaikie's patch to de-constify Type, with a few tweaks.	2011-07-18 04:54:35 +00:00
IPO.cpp	C API functions must be able to see their extern "C" definitions, or it will be impossible to call them from C.	2011-08-19 01:36:54 +00:00
LLVMBuild.txt	Add a basic-block autovectorization pass.	2012-02-01 03:51:43 +00:00
LoopExtractor.cpp	Move the CodeExtractor utility to a dedicated header file / source file,	2012-05-04 10:18:49 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
MergeFunctions.cpp	Remove tabs.	2012-07-19 00:11:40 +00:00
PartialInlining.cpp	Move the CodeExtractor utility to a dedicated header file / source file,	2012-05-04 10:18:49 +00:00
PassManagerBuilder.cpp	Port the SSAUpdater-based promotion logic from the old SROA pass to the	2012-09-15 11:43:14 +00:00
PruneEH.cpp	[unwind removal] We no longer have 'unwind' instructions being generated, so	2012-02-06 21:16:41 +00:00
StripDeadPrototypes.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
StripSymbols.cpp	Move the "findUsedStructTypes" functionality outside of the Module class.	2012-08-03 00:30:35 +00:00