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Michael Kuperstein 2a0f74a4bf [AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. 
Repeated inserts into AliasSetTracker have quadratic behavior - inserting a
pointer into AST is linear, since it requires walking over all "may" alias
sets and running an alias check vs. every pointer in the set.

We can avoid this by tracking the total number of pointers in "may" sets,
and when that number exceeds a threshold, declare the tracker "saturated".
This lumps all pointers into a single "may" set that aliases every other
pointer.

(This is a stop-gap solution until we migrate to MemorySSA)

This fixes PR28832.
Differential Revision: https://reviews.llvm.org/D23432

llvm-svn: 279274
2016-08-19 17:05:22 +00:00
bindings
cmake [CMake] Make llvm-config implicit dependency for subprojects 2016-08-18 21:41:21 +00:00
docs Fix link quotes on AArch64's CompilerWriterInfo section. 2016-08-18 22:10:06 +00:00
examples Replace a few more "fall through" comments with LLVM_FALLTHROUGH 2016-08-17 20:30:52 +00:00
include [AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. 2016-08-19 17:05:22 +00:00
lib [AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. 2016-08-19 17:05:22 +00:00
projects
resources
runtimes [CMake] Add variables for tracking which runtimes are included 2016-08-18 22:18:11 +00:00
test [AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. 2016-08-19 17:05:22 +00:00
tools llvm-objdump: Add Hexagon printer changes for -S/-l options 2016-08-18 21:50:13 +00:00
unittests [PM] Revert r279227 and r279228 until I can find someone to help me 2016-08-19 10:51:55 +00:00
utils Replace a few more "fall through" comments with LLVM_FALLTHROUGH 2016-08-17 20:30:52 +00:00
.arcconfig Upgrade all the .arcconfigs to https. 2016-07-14 13:15:37 +00:00
.clang-format
.clang-tidy
.gitignore [CMake] Add LLVM runtimes directory 2016-06-23 22:07:21 +00:00
CMakeLists.txt [CMake] Silence message on multi-configuration generators 2016-08-18 18:17:28 +00:00
CODE_OWNERS.TXT test commit 2016-08-02 19:25:17 +00:00
configure
CREDITS.TXT Shamelessly add myself to CREDITS.TXT 2016-08-04 16:28:22 +00:00
LICENSE.TXT Remove autoconf references from LICENSE.TXT 2016-08-12 20:11:03 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Revert rL277454 2016-08-02 13:26:07 +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.