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Justin Bogner 7837a2b037 SDAG: Avoid a large, usually empty SmallVector in a recursive function 
This SmallVector is using up 128 bytes on the stack every time despite
almost always being empty[1], and since this function can recurse quite
deeply that adds up to a lot of overhead. We've seen this run afoul of
ulimits in some cases with ASAN on.

Replacing the SmallVector with a std::vector trades an occasional heap
allocation for vastly less stack usage.

[1]: I gathered some stats on an internal test suite and the vector
was non-empty in only 45,000 of 10,000,000 calls to this function.

llvm-svn: 288441
2016-12-02 00:11:01 +00:00
bindings Fix go binding to adapt the new attribute API 2016-11-18 10:11:02 +00:00
cmake cmake: Set rpath for loadable modules as well as shared libraries. 2016-11-28 21:59:14 +00:00
docs Revert 'Test commit as per developer policy' 2016-11-30 08:24:43 +00:00
examples ExceptionDemo: remove some undefined behaviour 2016-11-20 02:36:38 +00:00
include [MC] Refactor emitELFSize to make usage more consistent. NFC. 2016-12-01 23:39:08 +00:00
lib SDAG: Avoid a large, usually empty SmallVector in a recursive function 2016-12-02 00:11:01 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake] Make the runtimes directory work with bootstrap builds 2016-10-19 21:50:25 +00:00
test [AArch64] Fold more spilled/refilled COPYs. 2016-12-01 23:43:55 +00:00
tools llvm-modextract: Call keep() on the output stream before exiting. 2016-12-01 23:13:11 +00:00
unittests Use trigrams to speed up SpecialCaseList. 2016-12-01 02:54:54 +00:00
utils [tablegen] Delete duplicates from a vector without skipping elements 2016-12-01 19:38:50 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: ignore VS Code editor files 2016-09-02 22:54:26 +00:00
CMakeLists.txt Add link-time detection of LLVM_ABI_BREAKING_CHECKS mismatch 2016-11-28 22:23:53 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of Loop Strenght Reduce. 2016-11-30 19:55:49 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Test Commit, removing a blank line in CREDITS.TXT 2016-11-24 15:40:19 +00:00
LICENSE.TXT Remove autoconf references from LICENSE.TXT 2016-08-12 20:11:03 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Test commit, deleted empty line at the end of README.txt 2016-11-07 18:31:21 +00:00
RELEASE_TESTERS.TXT Adding RELEASE_TESTERS.TXT 2016-07-21 16:46:44 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

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.