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Vedant Kumar 0bd9907581 [llvm-profdata] Speed up merging by using a thread pool 
Add a "-j" option to llvm-profdata to control the number of threads
used. Auto-detect NumThreads when it isn't specified, and avoid spawning
threads when they wouldn't be beneficial.

I tested this patch using a raw profile produced by clang (147MB). Here is the
time taken to merge 4 copies together on my laptop:

  No thread pool: 112.87s user 5.92s system 97% cpu 2:01.08 total
  With 2 threads: 134.99s user 26.54s system 164% cpu 1:33.31 total

Differential Revision: https://reviews.llvm.org/D22438

llvm-svn: 275921
 		2016-07-18 22:02:39 +00:00
..
Analysis [X86] Add CTPOP/CTLZ/CTTZ scalar cost tests 2016-07-17 18:29:19 +00:00
Assembler [ConstantFold] Don't incorrectly infer inbounds on array GEP 2016-07-13 03:24:41 +00:00
Bindings Add writeonly IR attribute 2016-07-04 08:01:29 +00:00
Bitcode Add writeonly IR attribute 2016-07-04 08:01:29 +00:00
BugPoint
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CodeGen [NVPTX] Make sure we adjust alignment at all call sites 2016-07-18 21:58:48 +00:00
DebugInfo [pdb] Teach MsfBuilder and other classes about the Free Page Map. 2016-07-15 22:17:19 +00:00
Examples
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ExecutionEngine X86: handle external tail calls in Windows JIT 2016-07-14 17:27:06 +00:00
Feature Temporarily remove a test case to unblock PPC bots. 2016-07-08 00:35:39 +00:00
FileCheck Make check lines not match themselves. 2016-06-16 19:38:48 +00:00
Instrumentation [sanitizer-coverage] make sure that calls to __sanitizer_cov_trace_pc are not merged (otherwise different calls get the same PC and confuse fuzzers) 2016-07-14 17:59:01 +00:00
Integer
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JitListener
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LTO Add a libLTO API to query a memory buffer and check if it contains ObjC categories 2016-07-11 23:10:18 +00:00
LibDriver
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Linker Don't verify inputs to the Linker if ODR merging. 2016-06-29 18:31:48 +00:00
MC [MC] Cleanup Error Handling in AsmParser 2016-07-18 15:24:03 +00:00
Object Add checks to the MachOObjectFile() constructor to make sure load commands sizes 2016-07-07 22:11:42 +00:00
ObjectYAML [YAML] Fix YAML tags appearing before the start of sequence elements 2016-06-28 21:10:26 +00:00
Other Temporarily remove one test run line to unblock PPC bots. 2016-07-08 00:32:58 +00:00
SymbolRewriter
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TableGen tests: accept different TargetOpcode values. 2016-07-07 17:51:42 +00:00
ThinLTO/X86 ThinLTO: Do not take into account whether a definition has multiple copies when promoting. 2016-07-07 18:31:51 +00:00
Transforms [PM] Convert Loop Strength Reduce pass to new PM 2016-07-18 21:41:50 +00:00
Unit
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Verifier Add writeonly IR attribute 2016-07-04 08:01:29 +00:00
YAMLParser
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tools [llvm-profdata] Speed up merging by using a thread pool 2016-07-18 22:02:39 +00:00
.clang-format
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CMakeLists.txt [cmake] Fix builds with LLVM_ENABLE_PIC=0 2016-06-02 16:29:07 +00:00
TestRunner.sh
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lit.cfg Review fixes to lit documentation 2016-07-12 20:59:17 +00:00
lit.site.cfg.in Add the printing the Mach-O (__LLVM,__bundle) xar archive file section "verbosely" 2016-05-23 21:34:12 +00:00