Daniel Sanders 6542491095 Annotate timeline in Instruments with passes and other timed regions. ... Summary: Instruments is a useful tool for finding performance issues in LLVM but it can be difficult to identify regions of interest on the timeline that we can use to filter the profiler or allocations instrument. Xcode 10 and the latest macOS/iOS/etc. added support for the os_signpost() API which allows us to annotate the timeline with information that's meaningful to LLVM. This patch causes timer start and end events to emit signposts. When used with -time-passes, this causes the passes to be annotated on the Instruments timeline. In addition to visually showing the duration of passes on the timeline, it also allows us to filter the profile and allocations instrument down to an individual pass allowing us to find the issues within that pass without being drowned out by the noise from other parts of the compiler. Using this in conjunction with the Time Profiler (in high frequency mode) and the Allocations instrument is how I found the SparseBitVector that should have been a BitVector and the DenseMap that could be replaced by a sorted vector a couple months ago. I added NamedRegionTimers to TableGen and used the resulting annotations to identify the slow portions of the Register Info Emitter. Some of these were placed according to educated guesses while others were placed according to hot functions from a previous profile. From there I filtered the profile to a slow portion and the aforementioned issues stood out in the profile. To use this feature enable LLVM_SUPPORT_XCODE_SIGNPOSTS in CMake and run the compiler under Instruments with -time-passes like so: instruments -t 'Time Profiler' bin/llc -time-passes -o - input.ll' Then open the resulting trace in Instruments. There was a talk at WWDC 2018 that explained the feature which can be found at https://developer.apple.com/videos/play/wwdc2018/405/ if you'd like to know more about it. Reviewers: bogner Reviewed By: bogner Subscribers: jdoerfert, mgorny, kristina, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D52954 llvm-svn: 354365		2019-02-19 18:18:31 +00:00
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Unix	Add OpenBSD support to be able to get the thread name	2019-02-07 02:06:58 +00:00
Windows	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
AArch64TargetParser.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Allocator.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
AMDGPUMetadata.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
APFloat.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
APInt.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
APSInt.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ARMAttributeParser.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ARMBuildAttrs.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ARMTargetParser.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ARMWinEH.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Atomic.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryStreamError.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryStreamReader.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryStreamRef.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryStreamWriter.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BlockFrequency.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BranchProbability.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BuryPointer.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CachePruning.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Chrono.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
circular_raw_ostream.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CMakeLists.txt	Annotate timeline in Instruments with passes and other timed regions.	2019-02-19 18:18:31 +00:00
CodeGenCoverage.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
COM.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CommandLine.cpp	Recommit: Add support for prefix-only CLI options	2019-02-05 14:17:16 +00:00
Compression.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ConvertUTF.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ConvertUTFWrapper.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
DAGDeltaAlgorithm.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
DataExtractor.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Debug.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
DebugCounter.cpp	Print out DebugCounter info with -print-debug-counter	2018-10-23 21:51:56 +00:00
DeltaAlgorithm.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
DJB.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
DynamicLibrary.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Errno.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Error.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ErrorHandling.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FileCheck.cpp	[FileCheck] Suppress old -v/-vv diags if dumping input	2019-01-22 21:41:42 +00:00
FileOutputBuffer.cpp	FileOutputBuffer: handle mmap(2) failure	2019-01-22 21:49:56 +00:00
FileUtilities.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FoldingSet.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FormattedStream.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FormatVariadic.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
GlobPattern.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
GraphWriter.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Hashing.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Host.cpp	[X86] Add 'mpx' to getHostCPUFeatures.	2019-02-13 20:12:41 +00:00
InitLLVM.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
IntEqClasses.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
IntervalMap.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ItaniumManglingCanonicalizer.cpp	Update more file headers across all of the LLVM projects in the monorepo	2019-01-19 10:56:40 +00:00
JamCRC.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
JSON.cpp	[JSON] Work around excess-precision issue when comparing T_Integer numbers.	2019-01-25 15:05:33 +00:00
KnownBits.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LEB128.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LineIterator.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LLVMBuild.txt	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Locale.cpp	[Windows] Convert from UTF-8 to UTF-16 when writing to a Windows console	2018-09-05 00:08:56 +00:00
LockFileManager.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
LowLevelType.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ManagedStatic.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MathExtras.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MD5.cpp
Memory.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MemoryBuffer.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Mutex.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
NativeFormatting.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Optional.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Options.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Parallel.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Path.cpp	[Support] Fix TempFile::discard to not leave behind temporary files	2019-02-14 11:08:49 +00:00
PluginLoader.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
PrettyStackTrace.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Process.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Program.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
RandomNumberGenerator.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
raw_os_ostream.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
raw_ostream.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
regcomp.c
regengine.inc	[ADT] Replace std::isprint by llvm::isPrint.	2018-07-26 15:31:41 +00:00
regerror.c
regex2.h
regex_impl.h	Remove trailing space	2018-07-30 19:41:25 +00:00
Regex.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScaledNumber.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ScopedPrinter.cpp
SHA1.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Signals.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Signposts.cpp	Annotate timeline in Instruments with passes and other timed regions.	2019-02-19 18:18:31 +00:00
SmallPtrSet.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SmallVector.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SourceMgr.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SpecialCaseList.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Statistic.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StringExtras.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StringMap.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StringPool.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StringRef.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
StringSaver.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SymbolRemappingReader.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
SystemUtils.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TargetParser.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TargetRegistry.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TarWriter.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Threading.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ThreadLocal.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ThreadPool.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Timer.cpp	Annotate timeline in Instruments with passes and other timed regions.	2019-02-19 18:18:31 +00:00
ToolOutputFile.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TrigramIndex.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Triple.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Twine.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Unicode.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
UnicodeCaseFold.cpp
Valgrind.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
VersionTuple.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
VirtualFileSystem.cpp	Reapply [VFS] Allow multiple RealFileSystem instances with independent CWDs.	2019-02-14 12:57:01 +00:00
Watchdog.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
WithColor.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
xxhash.cpp	Make ICF log output order deterministic.	2018-07-31 18:04:58 +00:00
YAMLParser.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
YAMLTraits.cpp	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00