Quentin Colombet 4c2a2ac196 [LiveIntervalAnalysis] Speed up creation of live ranges for physical registers ... by using a segment set. The patch addresses a compile-time performance regression in the LiveIntervals analysis pass (see http://llvm.org/bugs/show_bug.cgi?id=18580). This regression is especially critical when compiling long functions. Our analysis had shown that the most of time is taken for generation of live intervals for physical registers. Insertions in the middle of the array of live ranges cause quadratic algorithmic complexity, which is apparently the main reason for the slow-down. Overview of changes: - The patch introduces an additional std::set<Segment>* member in LiveRange for storing segments in the phase of initial creation. The set is used if this member is not NULL, otherwise everything works the old way. - The set of operations on LiveRange used during initial creation (i.e. used by createDeadDefs and extendToUses) have been reimplemented to use the segment set if it is available. - After a live range is created the contents of the set are flushed to the segment vector, because the set is not as efficient as the vector for the later uses of the live range. After the flushing, the set is deleted and cannot be used again. - The set is only for live ranges computed in LiveIntervalAnalysis::computeLiveInRegUnits() and getRegUnit() but not in computeVirtRegs(), because I did not bring any performance benefits to computeVirtRegs() and for some examples even brought a slow down. Patch by Vaidas Gasiunas <vaidas.gasiunas@sap.com> Differential Revision: http://reviews.llvm.org/D6013 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228421 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-06 18:42:41 +00:00
..
ADT	ADT: Add int64_t interoperability to APSInt	2015-02-05 00:17:43 +00:00
Analysis	[LV] Move addRuntimeCheck to LoopAccessAnalysis	2015-02-06 18:31:04 +00:00
AsmParser	Pass a MemoryBufferRef when we can avoid taking ownership.	2014-08-26 21:49:01 +00:00
Bitcode	IR: Assembly and bitcode for GenericDebugNode	2015-02-03 21:54:14 +00:00
CodeGen	[LiveIntervalAnalysis] Speed up creation of live ranges for physical registers	2015-02-06 18:42:41 +00:00
Config	[Cygming] Seek also chkstk_ms, or JIT fails with DLL builds. It is fixup for r227519.	2015-01-30 13:01:19 +00:00
DebugInfo/DWARF	Move DebugInfo to DebugInfo/DWARF.	2015-01-30 18:07:45 +00:00
ExecutionEngine	[Orc] Make the ObjectLinkingLayer take ownership of object files until	2015-02-02 04:32:17 +00:00
IR	Value: Remove superfluous typedefs and deprecated method. NFC.	2015-02-06 14:44:02 +00:00
IRReader	Pass a MemoryBufferRef when we can avoid taking ownership.	2014-08-26 21:49:01 +00:00
LineEditor	[C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API.	2014-04-21 09:34:48 +00:00
Linker	Use the DiagnosticHandler to print diagnostics when reading bitcode.	2015-01-10 00:07:30 +00:00
LTO	[LTO API] split lto_codegen_compile to lto_codegen_optimize and	2015-02-03 18:39:15 +00:00
MC	[MC] Remove various unused MCAsmInfo parameters.	2015-02-05 00:58:51 +00:00
Object	dd the option, -link-opt-hints to llvm-objdump used with -macho to print the	2015-01-27 21:28:24 +00:00
Option	Add an overload of getLastArgNoClaim taking two OptSpecifiers.	2014-09-12 19:42:53 +00:00
ProfileData	InstrProf: Make CounterMappingRegions less confusing to construct	2015-02-03 23:59:33 +00:00
Support	Add support for double / float to EndianStream	2015-02-05 03:30:08 +00:00
TableGen	Make MultiClass::DefPrototypes own their Records to fix memory leaks.	2014-12-11 05:25:33 +00:00
Target	[CodeGen] Add hook/combine to form vector extloads, enabled on X86.	2015-02-05 18:31:02 +00:00
Transforms	Add missing include.	2015-02-04 18:16:53 +00:00
CMakeLists.txt	Remove llvm_headers_do_not_build for the benefit of XCode and Visual Studio users.	2014-08-14 00:51:47 +00:00
InitializePasses.h	Introduce print-memderefs to test isDereferenceablePointer	2015-02-06 01:46:42 +00:00
LinkAllIR.h
LinkAllPasses.h	Introduce print-memderefs to test isDereferenceablePointer	2015-02-06 01:46:42 +00:00
module.modulemap	Bring the modules buildbot back to life after r226940.	2015-01-24 01:55:52 +00:00
module.modulemap.build	[modules] Add module maps for LLVM. These are not quite ready for prime-time	2014-05-21 02:46:14 +00:00
Pass.h	Revert "[PM] Add pass run listeners to the pass manager."	2014-05-15 17:49:20 +00:00
PassAnalysisSupport.h	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-14 00:51:57 +00:00
PassInfo.h	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00
PassManager.h
PassRegistry.h	[PM] Remove an unused and rather expensive mapping from an analysis	2014-10-06 00:30:59 +00:00
PassSupport.h	Defining a new API for debug options that doesn't rely on static global cl::opts.	2014-10-15 21:54:35 +00:00