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llvm-project/llvm/lib/Support
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Paul Kirth dc3b5141cd
[llvm][mustache] Optimize accessor splitting with a single pass (#159198) 
The splitMustacheString function previously used a loop of
StringRef::split and StringRef::trim. This was inefficient as
it scanned each segment of the accessor string multiple times.

This change introduces a custom splitAndTrim function that
performs both operations in a single pass over the string,
reducing redundant work and improving performance, most notably
in the number of CPU cycles executed.

| Metric | Baseline | Optimized | Change |
| --- | --- | --- | --- |
| Time (ms) | 35\.57 | 35\.36 | \-0.59% |
| Cycles | 34\.91M | 34\.26M | \-1.86% |
| Instructions | 85\.54M | 85\.24M | \-0.35% |
| Branch Misses | 111\.9K | 112\.2K | \+0.27% |
| Cache Misses | 242\.1K | 239\.9K | \-0.91% |
2025-11-04 23:56:00 +00:00
..
BLAKE3
[Support] Simplify macro conditions involving __GNUC__ (NFC) (#155070)
2025-08-23 07:10:02 -07:00
LSP
[Support] Simplify control flow in percentDecode (NFC) (#165134)
2025-10-26 08:20:20 -07:00
rpmalloc
[NFC][LLVM] Use Unix line endings for a few source files (#160794)
2025-09-26 08:58:12 -07:00
Unix
[ADT, Support] Use std::min and std::max (NFC) (#164145)
2025-10-19 12:37:43 -07:00
Windows
[Support] Fix memory leak induced by sys::RemoveFileOnSignal (#159984)
2025-11-01 10:55:34 -04:00
AArch64AttributeParser.cpp
[lld][AArch64][Build Attributes] Add support for AArch64 Build Attributes (#147970)
2025-07-24 10:38:36 +01:00
AArch64BuildAttributes.cpp
[ADT] Prepare to deprecate variadic StringSwitch::Cases. NFC. (#166020)
2025-11-02 00:12:33 +00:00
ABIBreak.cpp
…
Allocator.cpp
…
AllocToken.cpp
[AllocToken] Make token mode a pass parameter (#163634)
2025-10-22 11:23:02 +02:00
AMDGPUMetadata.cpp
…
APFixedPoint.cpp
[NFC][ADT/Support] Add {} for else when if body has {} (#140758)
2025-05-21 13:19:09 -07:00
APFloat.cpp
[Support] Remove redundant declarations (NFC) (#165971)
2025-11-01 09:25:12 -07:00
APInt.cpp
[ADT] Add fshl/fshr operations to APInt (#153790)
2025-08-21 12:52:18 +01:00
APSInt.cpp
…
ARMAttributeParser.cpp
[ELFAttributeParser][NFC] Make string arrays const (#101460)
2024-08-02 18:37:05 +02:00
ARMBuildAttributes.cpp
[Build Attributes] Standardize names according to convention. (#124556)
2025-01-28 09:53:45 +00:00
ARMWinEH.cpp
[Support] Use list-initialization for returning pairs (#160645)
2025-09-25 08:51:55 -07:00
Atomic.cpp
…
AutoConvert.cpp
use Twine instead of char* for function args (#165569)
2025-10-29 11:02:28 -04:00
BalancedPartitioning.cpp
[Support] Use "using" instead of "typedef" (NFC) (#166130)
2025-11-03 08:41:32 -08:00
Base64.cpp
…
BinaryStreamError.cpp
…
BinaryStreamReader.cpp
[Support] Use list-initialization for returning pairs (#160645)
2025-09-25 08:51:55 -07:00
BinaryStreamRef.cpp
…
BinaryStreamWriter.cpp
[Support] Use list-initialization for returning pairs (#160645)
2025-09-25 08:51:55 -07:00
BlockFrequency.cpp
…
BranchProbability.cpp
[Support] Remove redundant declarations (NFC) (#166106)
2025-11-02 22:42:47 -08:00
BuryPointer.cpp
…
CachePruning.cpp
…
Caching.cpp
Modify the localCache API to require an explicit commit on CachedFile… (#136121)
2025-04-22 09:45:15 +01:00
Chrono.cpp
[llvm] annotate interfaces in llvm/Support for DLL export (#136014)
2025-05-12 12:13:52 -07:00
circular_raw_ostream.cpp
…
CMakeLists.txt
[AllocToken] Refactor stateless token calculation into Support (#163633)
2025-10-22 10:27:55 +02:00
CodeGenCoverage.cpp
…
COM.cpp
…
CommandLine.cpp
[Support] Use "using" instead of "typedef" (NFC) (#166130)
2025-11-03 08:41:32 -08:00
Compression.cpp
[Support] Check zstd decompress result before msan unpoison (#117276)
2024-11-25 08:59:17 +08:00
ConvertEBCDIC.cpp
…
ConvertUTF.cpp
[Support] Simplify macro conditions involving __GNUC__ (NFC) (#155070)
2025-08-23 07:10:02 -07:00
ConvertUTFWrapper.cpp
[Clang] Add warnings when mixing different charN_t types (#138708)
2025-05-15 18:16:05 +02:00
COPYRIGHT.regex
…
CrashRecoveryContext.cpp
[llvm] Remove unused includes (NFC) (#142733)
2025-06-04 12:30:52 -07:00
CRC.cpp
…
CSKYAttributeParser.cpp
[readobj][Arm][AArch64] Refactor Build Attributes parsing under ELFAtributeParser and add support for AArch64 Build Attributes (#128727)
2025-03-10 09:48:40 +00:00
CSKYAttributes.cpp
…
DAGDeltaAlgorithm.cpp
[Support] Use "using" instead of "typedef" (NFC) (#166130)
2025-11-03 08:41:32 -08:00
DataExtractor.cpp
[Support] Add signed operations to DataExtractor (#147261)
2025-07-08 08:47:04 +02:00
Debug.cpp
Introduce a "log level" support for DEBUG_TYPE (#150855)
2025-07-28 18:10:36 +02:00
DebugCounter.cpp
[DebugCounter] Add -print-debug-counter-queries option (#162827)
2025-10-13 08:46:04 +00:00
DebugOptions.h
Reapply [IR] Remove options to make scalable TypeSize access a warning (#156336)
2025-09-03 11:12:11 +02:00
DeltaAlgorithm.cpp
…
DeltaTree.cpp
[llvm][clang] Move RewriterBuffer to ADT. (#99770)
2024-08-18 09:46:51 -07:00
DivisionByConstantInfo.cpp
…
DJB.cpp
…
DXILABI.cpp
[NFC][LLVM] Fix line endings for DXILABI.cpp (#160791)
2025-09-26 08:57:51 -07:00
DynamicAPInt.cpp
[llvm] properly guard dump methods in Support lib classes (#139938)
2025-05-14 13:48:45 -07:00
DynamicLibrary.cpp
[Support] Use "using" instead of "typedef" (NFC) (#166130)
2025-11-03 08:41:32 -08:00
ELFAttributes.cpp
…
ELFAttrParserCompact.cpp
[readobj][Arm][AArch64] Refactor Build Attributes parsing under ELFAtributeParser and add support for AArch64 Build Attributes (#128727)
2025-03-10 09:48:40 +00:00
ELFAttrParserExtended.cpp
[llvm] Remove unused includes (NFC) (#142733)
2025-06-04 12:30:52 -07:00
Errno.cpp
[CMake] Remove some always-true HAVE_XXX_H
2025-01-15 09:53:21 -08:00
Error.cpp
[ErrorHandling] Add reportFatalInternalError + reportFatalUsageError (NFC) (#138251)
2025-05-05 12:10:03 +02:00
ErrorHandling.cpp
ErrorHandling: Check for EINTR and partial writes (#147595)
2025-07-09 11:19:21 -07:00
ExponentialBackoff.cpp
…
ExtensibleRTTI.cpp
…
FileCollector.cpp
[llvm] Use the VFS to get the real path in FileCollector (#160943)
2025-09-29 09:00:37 -07:00
FileOutputBuffer.cpp
[Support] Set OF_Delete for InMemoryBuffer's call to openFileForWrite under commit (#140109)
2025-05-16 06:40:45 -07:00
FileUtilities.cpp
…
FloatingPointMode.cpp
…
FoldingSet.cpp
[NFC][Support] Add llvm::uninitialized_copy (#138174)
2025-05-07 17:37:38 -07:00
FormattedStream.cpp
[FormattedStream] Add ASCII fast path (#117892)
2024-12-02 14:31:24 +01:00
FormatVariadic.cpp
[formatv] Leave format parameters unstripped (#112625)
2024-10-16 15:53:52 -07:00
GlobPattern.cpp
[NFC][GlobPattern] Add GlobPattern::longest_substr() (#164512)
2025-10-23 03:46:40 +00:00
GraphWriter.cpp
[llvm] Use llvm::replace (NFC) (#137481)
2025-04-26 18:18:09 -07:00
HexagonAttributeParser.cpp
[readobj][Arm][AArch64] Refactor Build Attributes parsing under ELFAtributeParser and add support for AArch64 Build Attributes (#128727)
2025-03-10 09:48:40 +00:00
HexagonAttributes.cpp
…
InitLLVM.cpp
[SystemZ][z/OS] Refactor AutoConvert.h to remove large MVS guard (#143174)
2025-06-11 15:26:49 -04:00
InstructionCost.cpp
…
IntEqClasses.cpp
…
IntervalMap.cpp
…
Jobserver.cpp
Reland "[LLVM] Add GNU make jobserver support (#145131)"
2025-10-03 17:38:37 -04:00
JSON.cpp
[Support] Simplify Object::operator== (NFC) (#157311)
2025-09-07 10:46:02 -07:00
KnownBits.cpp
[KnownBits] Add setAllConflict to set all bits in Zero and One. NFC (#159815)
2025-09-19 13:15:54 -07:00
KnownFPClass.cpp
[Analysis][NFC] Extract KnownFPClass (#133457)
2025-03-28 18:10:02 +01:00
LEB128.cpp
…
LineIterator.cpp
…
Locale.cpp
…
LockFileManager.cpp
[llvm] Remove unused includes (NFC) (#142733)
2025-06-04 12:30:52 -07:00
ManagedStatic.cpp
…
MathExtras.cpp
…
MD5.cpp
[support][nfc] MD5: Undef macros after use (#132132)
2025-03-21 05:26:04 +03:00
MemAlloc.cpp
[Support] Report OOM from allocate_buffer (#85449)
2025-01-27 09:04:43 -08:00
Memory.cpp
…
MemoryBuffer.cpp
use Twine instead of char* for function args (#165569)
2025-10-29 11:02:28 -04:00
MemoryBufferRef.cpp
…
ModRef.cpp
[IR][ModRef] Introduce errno memory location
2025-02-13 12:13:39 +01:00
MSP430AttributeParser.cpp
[Support] Remove unused includes (NFC) (#116752)
2024-11-20 06:51:43 -08:00
MSP430Attributes.cpp
…
Mustache.cpp
[llvm][mustache] Optimize accessor splitting with a single pass (#159198)
2025-11-04 23:56:00 +00:00
NativeFormatting.cpp
[Support] Remove unused includes (NFC) (#116752)
2024-11-20 06:51:43 -08:00
OptimizedStructLayout.cpp
[Support] Use list-initialization for returning pairs (#160447)
2025-09-24 08:44:56 -07:00
Optional.cpp
…
OptionStrCmp.cpp
[NFC] Fix line endings for ModRef.cpp/OptionStrCmp.cpp (#109712)
2024-09-23 21:17:04 -07:00
Parallel.cpp
Reland "[LLVM] Add GNU make jobserver support (#145131)"
2025-10-03 17:38:37 -04:00
Path.cpp
[llvm][support] Move make_absolute from sys::fs to sys::path (#161459)
2025-10-01 14:35:17 -07:00
PGOOptions.cpp
[llvm] Add vfs::FileSystem to PassBuilder (#160188)
2025-09-25 10:15:47 -07:00
PluginLoader.cpp
…
PrettyStackTrace.cpp
[llvm] Replace LLVM_ATTRIBUTE_UNUSED with [[maybe_unused]] (NFC) (#163507)
2025-10-15 06:54:14 -07:00
Process.cpp
[Support] Remove unused includes (NFC) (#116752)
2024-11-20 06:51:43 -08:00
Program.cpp
[Support] Construct SmallVector with ArrayRef (NFC) (#137586)
2025-04-28 22:25:17 -07:00
ProgramStack.cpp
Reland: [llvm][clang] Allocate a new stack instead of spawning a new thread to get more stack space (#136046)
2025-04-30 19:14:15 -07:00
RandomNumberGenerator.cpp
…
raw_os_ostream.cpp
…
raw_ostream_proxy.cpp
Support: Add proxies for raw_ostream and raw_pwrite_stream (#113362)
2025-08-26 16:19:52 -07:00
raw_ostream.cpp
[Support] Remove redundant declarations (NFC) (#166011)
2025-11-01 12:41:59 -07:00
raw_socket_stream.cpp
[ADT, Support] Use "= default" (NFC) (#166007)
2025-11-01 12:41:43 -07:00
regcomp.c
[Support] Remove an unnecessary cast (NFC) (#152442)
2025-08-07 07:22:50 -07:00
regengine.inc
…
regerror.c
…
regex2.h
…
regex_impl.h
…
Regex.cpp
…
regexec.c
…
regfree.c
…
regstrlcpy.c
…
regutils.h
…
RewriteBuffer.cpp
[llvm][clang] Move RewriterBuffer to ADT. (#99770)
2024-08-18 09:46:51 -07:00
RewriteRope.cpp
[llvm][clang] Move RewriterBuffer to ADT. (#99770)
2024-08-18 09:46:51 -07:00
RISCVAttributeParser.cpp
[readobj][Arm][AArch64] Refactor Build Attributes parsing under ELFAtributeParser and add support for AArch64 Build Attributes (#128727)
2025-03-10 09:48:40 +00:00
RISCVAttributes.cpp
…
RISCVISAUtils.cpp
…
RWMutex.cpp
[llvm] Add back Allocator.h include to RWMutex.cpp.
2024-11-20 15:00:11 +00:00
ScaledNumber.cpp
[Support] Use list-initialization for returning pairs (#160447)
2025-09-24 08:44:56 -07:00
ScopedPrinter.cpp
[NFC][LLVM][Support] Misc code cleanup in ScopedPrinter (#161462)
2025-10-01 13:58:26 -07:00
SHA1.cpp
…
SHA256.cpp
…
Signals.cpp
[Support] Remove an unnecessary cast (NFC) (#146810)
2025-07-03 12:02:26 -07:00
Signposts.cpp
…
SipHash.cpp
[Support] Add SipHash-based 64-bit stable hash function (#160945)
2025-09-29 15:56:54 +02:00
SlowDynamicAPInt.cpp
[llvm] properly guard dump methods in Support lib classes (#139938)
2025-05-14 13:48:45 -07:00
SmallPtrSet.cpp
[Support] Use list-initialization for returning pairs (#160447)
2025-09-24 08:44:56 -07:00
SmallVector.cpp
[ADT] Declare replaceAllocation in SmallVector.cpp (NFC) (#107469)
2024-09-05 15:47:28 -07:00
SourceMgr.cpp
[support] Don't require VFS in SourceMgr for loading includes (#163862)
2025-10-17 08:12:34 -07:00
SpecialCaseList.cpp
[SpecialCaseList] Add RadixTree for substring matching (#164545)
2025-10-27 05:30:38 +00:00
Statistic.cpp
…
StringExtras.cpp
[Support] Use list-initialization for returning pairs (#160447)
2025-09-24 08:44:56 -07:00
StringMap.cpp
[ADT] Use "if constexpr" with shouldReverseIterate (#161477)
2025-10-01 08:59:23 -07:00
StringRef.cpp
[Support] Remove a redundant declaration (NFC) (#166085)
2025-11-02 13:15:01 -08:00
StringSaver.cpp
…
SuffixTree.cpp
[llvm] Use llvm::SmallVector::pop_back_val (NFC) (#136533)
2025-04-21 08:13:16 -07:00
SuffixTreeNode.cpp
[Support] Remove unused includes (NFC) (#116752)
2024-11-20 06:51:43 -08:00
SystemUtils.cpp
…
TarWriter.cpp
…
TextEncoding.cpp
[llvm] Replace LLVM_ATTRIBUTE_UNUSED with [[maybe_unused]] (NFC) (#163330)
2025-10-14 07:15:44 -07:00
Threading.cpp
Reland "[LLVM] Add GNU make jobserver support (#145131)"
2025-10-03 17:38:37 -04:00
ThreadPool.cpp
Reland "[LLVM] Add GNU make jobserver support (#145131)"
2025-10-03 17:38:37 -04:00
TimeProfiler.cpp
[llvm] Remove redundant calls to std::unique_ptr<T>::get (NFC) (#113415)
2024-10-23 10:44:09 -07:00
Timer.cpp
[Support] Use "using" instead of "typedef" (NFC) (#166130)
2025-11-03 08:41:32 -08:00
ToolOutputFile.cpp
…
TrieRawHashMap.cpp
[Support] Use std::optional::value_or (NFC) (#140436)
2025-05-18 07:34:20 -07:00
Twine.cpp
[ADT] Store integers by value in Twine (NFC) (#158409)
2025-09-13 07:50:37 -07:00
Unicode.cpp
…
UnicodeCaseFold.cpp
…
UnicodeNameToCodepoint.cpp
[llvm] Remove "const" in the presence of "constexpr" (NFC) (#166109)
2025-11-02 15:52:44 -08:00
UnicodeNameToCodepointGenerated.cpp
…
Valgrind.cpp
…
VersionTuple.cpp
[Support] Avoid setting minor/subminor/build in VersionTuple::withMajorReplaced (#139318)
2025-05-09 16:56:18 -07:00
VirtualFileSystem.cpp
[llvm][support] Move make_absolute from sys::fs to sys::path (#161459)
2025-10-01 14:35:17 -07:00
VirtualOutputBackend.cpp
Support: Add vfs::OutputBackend and OutputFile to virtualize compiler outputs (#113363)
2025-09-05 10:31:02 -07:00
VirtualOutputBackends.cpp
[llvm] Use [[fallthrough]] instead of LLVM_FALLTHROUGH (NFC) (#163086)
2025-10-12 20:49:19 -07:00
VirtualOutputConfig.cpp
Support: Add vfs::OutputBackend and OutputFile to virtualize compiler outputs (#113363)
2025-09-05 10:31:02 -07:00
VirtualOutputError.cpp
Support: Add vfs::OutputBackend and OutputFile to virtualize compiler outputs (#113363)
2025-09-05 10:31:02 -07:00
VirtualOutputFile.cpp
Support: Add vfs::OutputBackend and OutputFile to virtualize compiler outputs (#113363)
2025-09-05 10:31:02 -07:00
Watchdog.cpp
…
WithColor.cpp
…
xxhash.cpp
…
YAMLParser.cpp
[Support] Use list-initialization for returning pairs (#160645)
2025-09-25 08:51:55 -07:00
YAMLTraits.cpp
[Remarks] YAMLRemarkSerializer: StringRef-ize apis to avoid out-of-bounds read footguns (#160397)
2025-09-24 07:41:06 -07:00
Z3Solver.cpp
[analyzer] Correct Z3 test cases, fix exposed crashes (#146597)
2025-07-03 09:08:00 -05:00