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* Add convenient functions to compute hashes of byte vectors.Rui Ueyama2016-11-231-0/+4
| | | | | | | | | In many sitautions, you just want to compute a hash for one chunk of data. This patch adds convenient functions for that purpose. Differential Revision: https://reviews.llvm.org/D26988 llvm-svn: 287726
* SHA1: unroll loop in hashBlock.Rui Ueyama2016-11-201-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code is taken from public domain. https://github.com/jsonn/src/blob/trunk/common/lib/libc/hash/sha1/sha1.c I wrote a sha1 command and ran it on my Xeon E5-2680 v2 2.80GHz machine. Here is a result. The new hash function is 37% faster than before. Performance counter stats for './llvm-sha1-old /ssd/build/bin/lld' (10 runs): 6640.503687 task-clock (msec) # 1.001 CPUs utilized ( +- 0.03% ) 54 context-switches # 0.008 K/sec ( +- 5.03% ) 5 cpu-migrations # 0.001 K/sec ( +- 31.73% ) 183,803 page-faults # 0.028 M/sec ( +- 0.00% ) 18,527,954,113 cycles # 2.790 GHz ( +- 0.03% ) 4,993,237,485 stalled-cycles-frontend # 26.95% frontend cycles idle ( +- 0.11% ) <not supported> stalled-cycles-backend 50,217,149,423 instructions # 2.71 insns per cycle # 0.10 stalled cycles per insn ( +- 0.00% ) 6,094,322,337 branches # 917.750 M/sec ( +- 0.00% ) 11,778,239 branch-misses # 0.19% of all branches ( +- 0.01% ) 6.634017401 seconds time elapsed ( +- 0.03% ) Performance counter stats for './llvm-sha1-new /ssd/build/bin/lld' (10 runs): 4167.062720 task-clock (msec) # 1.001 CPUs utilized ( +- 0.02% ) 52 context-switches # 0.012 K/sec ( +- 16.45% ) 7 cpu-migrations # 0.002 K/sec ( +- 32.20% ) 183,804 page-faults # 0.044 M/sec ( +- 0.00% ) 11,626,611,958 cycles # 2.790 GHz ( +- 0.02% ) 4,491,897,976 stalled-cycles-frontend # 38.63% frontend cycles idle ( +- 0.05% ) <not supported> stalled-cycles-backend 24,320,180,617 instructions # 2.09 insns per cycle # 0.18 stalled cycles per insn ( +- 0.00% ) 1,574,674,576 branches # 377.886 M/sec ( +- 0.00% ) 11,769,693 branch-misses # 0.75% of all branches ( +- 0.00% ) 4.163251552 seconds time elapsed ( +- 0.02% ) Differential Revision: https://reviews.llvm.org/D26890 llvm-svn: 287473
* [Support] Fix Wcast-qual warningVedant Kumar2016-04-211-1/+2
| | | | llvm-svn: 267072
* ThinLTO: add module caching handling.Mehdi Amini2016-04-211-0/+7
| | | | | | | Differential Revision: http://reviews.llvm.org/D18494 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266959
* [NFC] Header cleanupMehdi Amini2016-04-181-3/+2
| | | | | | | | | | | | | | Removed some unused headers, replaced some headers with forward class declarations. Found using simple scripts like this one: clear && ack --cpp -l '#include "llvm/ADT/IndexedMap.h"' | xargs grep -L 'IndexedMap[<]' | xargs grep -n --color=auto 'IndexedMap' Patch by Eugene Kosov <claprix@yandex.ru> Differential Revision: http://reviews.llvm.org/D19219 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266595
* Add support for computing SHA1 in LLVMMehdi Amini2016-04-011-0/+75
| | | | | | | | | | | | | | | | Provide a class to generate a SHA1 from a sequence of bytes, and a convenience raw_ostream adaptor. This will be used to provide a "build-id" by hashing the Module block when writing bitcode. ThinLTO will use this information for incremental build. Reapply r265094 which was reverted in r265102 because it broke MSVC bots (constexpr is not supported). http://reviews.llvm.org/D16325 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 265107
* Revert "Add support for computing SHA1 in LLVM"Mehdi Amini2016-04-011-73/+0
| | | | | | | | This reverts commit r265096, r265095, and r265094. Windows build is broken, and the validation does not pass. From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 265102
* Add support for computing SHA1 in LLVMMehdi Amini2016-04-011-0/+73
Provide a class to generate a SHA1 from a sequence of bytes, and a convenience raw_ostream adaptor. This will be used to provide a "build-id" by hashing the Module block when writing bitcode. ThinLTO will use this information for incremental build. From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 265094
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