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Johannes Doerfert 39318f75ca [Attributor][NFC] Encode IRPositions in the bits of a single pointer 
This reduces memory consumption for IRPositions by eliminating the
vtable pointer and the `KindOrArgNo` integer. Since each abstract
attribute has an associated IRPosition, the 12-16 bytes we save add up
quickly.

No functional change is intended.

---

Single run of the Attributor module and then CGSCC pass (oldPM)
for SPASS/clause.c (~10k LLVM-IR loc):

Before:
```
calls to allocation functions: 469545 (260135/s)
temporary memory allocations: 77137 (42735/s)
peak heap memory consumption: 30.50MB
peak RSS (including heaptrack overhead): 119.50MB
total memory leaked: 269.07KB
```

After:
```
calls to allocation functions: 468999 (274108/s)
temporary memory allocations: 77002 (45004/s)
peak heap memory consumption: 28.83MB
peak RSS (including heaptrack overhead): 118.05MB
total memory leaked: 269.07KB
```

Difference:
```
calls to allocation functions: -546 (5808/s)
temporary memory allocations: -135 (1436/s)
peak heap memory consumption: -1.67MB
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B
```

---

CTMark 15 runs

Metric: compile_time

Program                                        lhs    rhs    diff
 test-suite...:: CTMark/sqlite3/sqlite3.test    25.07  24.09 -3.9%
 test-suite...Mark/mafft/pairlocalalign.test    14.58  14.14 -3.0%
 test-suite...-typeset/consumer-typeset.test    21.78  21.58 -0.9%
 test-suite :: CTMark/SPASS/SPASS.test          21.95  22.03  0.4%
 test-suite :: CTMark/lencod/lencod.test        25.43  25.50  0.3%
 test-suite...ark/tramp3d-v4/tramp3d-v4.test    23.88  23.83 -0.2%
 test-suite...TMark/7zip/7zip-benchmark.test    60.24  60.11 -0.2%
 test-suite :: CTMark/kimwitu++/kc.test         15.69  15.69 -0.0%
 test-suite...:: CTMark/ClamAV/clamscan.test    25.43  25.42 -0.0%
 test-suite :: CTMark/Bullet/bullet.test        37.63  37.62 -0.0%
 Geomean difference                                          -0.8%

---

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D78722
2020-04-24 01:58:47 -05:00
benchmarks
bindings Update go bindings for 2dea3f129878e929e5d1f00b91a622eb1ec8be4e 2020-04-22 19:02:59 +02:00
cmake [CMAKE] Provide default location for llvm-lit for out-of-tree users. 2020-04-22 15:13:23 -07:00
docs [CallSite removal] Remove the text describing CallSite from the manual. 2020-04-23 22:17:19 -04:00
examples [ORC] Add example showing how to initialize/deinitialize a JITDylib with LLJIT. 2020-04-18 14:16:54 -07:00
include [Attributor][NFC] Encode IRPositions in the bits of a single pointer 2020-04-24 01:58:47 -05:00
lib [Attributor][NFC] Encode IRPositions in the bits of a single pointer 2020-04-24 01:58:47 -05:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [runtimes] When COMPILER_RT is enabled, consider SANITIZER prefixes 2020-03-11 14:22:20 -07:00
test [AMDGPU] Add the SGPR used for FP copy to block livein lists. 2020-04-24 11:47:38 +05:30
tools [llvm-objdump][ELF][NFC] Create ELFDump.h 2020-04-23 21:24:37 -04:00
unittests [SVE] Remove calls to isScalable from CodeGen 2020-04-23 12:58:52 -07:00
utils [UpdateTestChecks] Make generation of UTC_ARGS: comment more robust 2020-04-23 13:12:27 +01:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt [SVE] Make VectorType::getNumElements() complain for scalable vectors 2020-04-23 10:47:38 -07:00
CODE_OWNERS.TXT Remove myself from CODE_OWNERS. 2020-02-25 11:59:29 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +00:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +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
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.