Chandler Carruth 63a1eb62e4 Introduce a BarrierNoop pass, a hack designed to allow *some* control ... over the implicitly-formed-and-nesting CGSCC pass manager and function pass managers, especially when using them on the opt commandline or using extension points in the module builder. The '-barrier' opt flag (or the pass itself) will create a no-op module pass in the pipeline, resetting the pass manager stack, and allowing the creation of a new pipeline of function passes or CGSCC passes to be created that is independent from any previous pipelines. For example, this can be used to test running two CGSCC passes in independent CGSCC pass managers as opposed to in the same CGSCC pass manager. It also allows us to introduce a further hack into the PassManagerBuilder to separate the O0 pipeline extension passes from the always-inliner's CGSCC pass manager, which they likely do not want to participate in... At the very least none of the Sanitizer passes want this behavior. This fixes a bug with ASan at O0 currently, and I'll commit the ASan test which covers this pass. I'm happy to add a test case that this pass exists and works, but not sure how much time folks would like me to spend adding test cases for the details of its behavior of partition pass managers.... The whole thing is just vile, and mostly intended to unblock ASan, so I'm hoping to rip this all out in a brave new pass manager world. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166172 91177308-0d34-0410-b5e6-96231b3b80d8		2012-10-18 08:05:46 +00:00
..
ArgumentPromotion.cpp	Add an enum for the return and function indexes into the AttrListPtr object. This gets rid of some magic numbers.	2012-10-15 07:29:08 +00:00
BarrierNoopPass.cpp	Introduce a BarrierNoop pass, a hack designed to allow *some* control	2012-10-18 08:05:46 +00:00
CMakeLists.txt	Introduce a BarrierNoop pass, a hack designed to allow *some* control	2012-10-18 08:05:46 +00:00
ConstantMerge.cpp	Move TargetData to DataLayout.	2012-10-08 16:38:25 +00:00
DeadArgumentElimination.cpp	Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.	2012-10-15 20:35:56 +00:00
ExtractGV.cpp	Remove tabs.	2012-07-19 00:11:40 +00:00
FunctionAttrs.cpp	Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.	2012-10-15 20:35:56 +00:00
GlobalDCE.cpp	Implement the isSafeToDiscardIfUnused predicate and use it in globalopt and	2012-06-14 22:48:13 +00:00
GlobalOpt.cpp	Use the Attributes::get method which takes an AttrVal value directly to simplify the code a bit. No functionality change.	2012-10-16 05:23:31 +00:00
InlineAlways.cpp	Create enums for the different attributes.	2012-10-09 07:45:08 +00:00
Inliner.cpp	Have 'addFnAttr' take the attribute enum value. Then have it build the attribute object and add it appropriately. No functionality change.	2012-10-10 03:12:49 +00:00
InlineSimple.cpp	Move TargetData to DataLayout.	2012-10-08 16:38:25 +00:00
Internalize.cpp	Add a Fixme.	2012-04-16 04:23:52 +00:00
IPConstantPropagation.cpp
IPO.cpp	Fix filename in file header.	2012-10-16 02:21:30 +00:00
LLVMBuild.txt
LoopExtractor.cpp	Move the CodeExtractor utility to a dedicated header file / source file,	2012-05-04 10:18:49 +00:00
Makefile
MergeFunctions.cpp	Move TargetData to DataLayout.	2012-10-08 16:38:25 +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	Introduce a BarrierNoop pass, a hack designed to allow *some* control	2012-10-18 08:05:46 +00:00
PruneEH.cpp	Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.	2012-10-15 20:35:56 +00:00
StripDeadPrototypes.cpp
StripSymbols.cpp	Move the "findUsedStructTypes" functionality outside of the Module class.	2012-08-03 00:30:35 +00:00