Chandler Carruth 8615ab4a4a [LPM] Switch LICM to actively use LCSSA in addition to preserving it. ... Fixes PR18753 and PR18782. This is necessary for LICM to preserve LCSSA correctly and efficiently. There is still some active discussion about whether we should be using LCSSA, but we can't just immediately stop using it and we *need* LICM to preserve it while we are using it. We can restore the old SSAUpdater driven code if and when there is a serious effort to remove the reliance on LCSSA from all of the loop passes. However, this also serves as a great example of why LCSSA is very nice to have. This change significantly simplifies the process of sinking instructions for LICM, and makes it quite a bit less expensive. It wouldn't even be as complex as it is except that I had to start the process of removing the big recursive LCSSA formation hammer in order to switch even this much of the re-forming code to asserting that LCSSA was preserved. I'll fully remove that next just to tidy things up until the LCSSA debate settles one way or the other. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201148 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-11 12:52:27 +00:00
..
Analysis	Make succ_iterator a real random access iterator and clean up a couple of users.	2014-02-10 14:17:42 +00:00
AsmParser	[ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret'	2014-01-31 17:41:22 +00:00
Bitcode	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
CodeGen	DebugInfo: Use existing symbol rather than creating it again.	2014-02-11 01:23:52 +00:00
DebugInfo	Change the begin and end methods in ObjectFile to match the style guide.	2014-02-10 20:24:04 +00:00
ExecutionEngine	In RuntimeDyldImpl::emitSection, make Allocate (section size to be allocated) a	2014-02-11 05:28:24 +00:00
IR	Mark the methods in the Mangler const.	2014-02-10 21:25:13 +00:00
IRReader	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
LineEditor	Avoid using EL_GETFP.	2014-02-04 20:04:46 +00:00
Linker	Add a -suppress-warnings option to bitcode linking.	2014-02-06 18:01:56 +00:00
LTO	LTO API: add lto_module_create_from_memory_with_path.	2014-02-10 23:26:14 +00:00
MC	Change the begin and end methods in ObjectFile to match the style guide.	2014-02-10 20:24:04 +00:00
Object	Change the begin and end methods in ObjectFile to match the style guide.	2014-02-10 20:24:04 +00:00
Option	Avoid buffer copies when a Twine already is a StringRef.	2013-12-03 18:18:28 +00:00
Support	Remove TimeValue::toPosixTime() -- it is buggy, semantics are unclear, and its	2014-02-11 09:11:18 +00:00
TableGen	[TableGen] Correctly generate implicit anonymous prototype defs in multiclasses	2014-01-02 20:47:09 +00:00
Target	XCore target: fix const section handling	2014-02-11 10:36:26 +00:00
Transforms	[LPM] Switch LICM to actively use LCSSA in addition to preserving it.	2014-02-11 12:52:27 +00:00
CMakeLists.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
LLVMBuild.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
Makefile	Introduce line editor library.	2014-01-31 23:46:14 +00:00