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Bjarke Hammersholt Roune c5853844e0 [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 
Summary:
http://reviews.llvm.org/D11212 made Scalar Evolution able to propagate NSW and NUW flags from instructions to SCEVs for add instructions. This patch expands that to sub, mul and shl instructions.

This change makes LSR able to generate pointer induction variables for loops like these, where the index is 32 bit and the pointer is 64 bit:

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[i - offset];

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[i * stride];

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[3 * (i << 7)];


Reviewers: atrick, sanjoy

Subscribers: sanjoy, majnemer, hfinkel, llvm-commits, meheff, jingyue, eliben

Differential Revision: http://reviews.llvm.org/D11860

llvm-svn: 245118
2015-08-14 22:45:26 +00:00
autoconf We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
bindings Revert "Fix llvm-config to emit the linker flag for the combined shared object built by autoconfig/make instead of the individual components." 2015-08-05 20:03:26 +00:00
cmake [cmake] Start adding support for LLVM_USE_SANITIZER=Address on Windows 2015-08-14 16:48:34 +00:00
docs [bpf] add documentation and instruction set description 2015-08-14 22:00:45 +00:00
examples Update ExceptionDemo for exception handling API changes (personality function call->function move) 2015-08-14 00:37:16 +00:00
include [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 2015-08-14 22:45:26 +00:00
lib [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 2015-08-14 22:45:26 +00:00
projects build: make libunwind a proper project 2015-04-25 01:47:39 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 2015-08-14 22:45:26 +00:00
tools [CMake] Fix PR14200, llvm-config output misses -fno-rtti 2015-08-14 16:20:31 +00:00
unittests [PM/AA] Hoist the interface to TBAA into a dedicated header along with 2015-08-14 03:33:48 +00:00
utils Remove and forbid raw_svector_ostream::flush() calls. 2015-08-13 18:12:56 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt [lit] Don't disable the lit progress bar by default with MSVC 2015-08-11 21:24:59 +00:00
CODE_OWNERS.TXT Add myself as the InstCombine owner. 2015-08-12 22:30:45 +00:00
configure We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +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 Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
Makefile.rules We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +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're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.