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Hal Finkel 987b4b6f61 [SelectionDAG] Swap commutative binops before constant-based folding 
In searching for a fix for the underlying code-quality bug highlighted by
r246937 (that SDAG simplification can lead to us generating an ISD::OR node
with a constant zero LHS), I ran across this:

We generically canonicalize commutative binary-operation nodes in SDAG getNode
so that, if only one operand is a constant, it will be on the RHS.  However, we
were doing this only after a bunch of constant-based simplification checks that
all assume this canonical form (that any constant will be on the RHS). Moving
the operand-swapping canonicalization prior to these checks seems like the
right thing to do (and, as it turns out, causes SDAG to completely fold away the
computation in test/CodeGen/ARM/2012-11-14-subs_carry.ll, just like InstCombine
would do).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246938 91177308-0d34-0410-b5e6-96231b3b80d8
2015-09-06 05:42:13 +00:00
autoconf Add an exposed variable for which c++ compiler we're using for our 2015-08-17 22:46:26 +00:00
bindings [bindings] Update Go bindings to DIBuilder 2015-09-06 02:22:15 +00:00
cmake [cmake] rework LLVM_LINK_LLVM_DYLIB option handling 2015-09-05 08:27:33 +00:00
docs [libFuzzer] actually make the dictionaries work (+docs) 2015-09-04 00:12:11 +00:00
examples Kaleidoscope: Prune __attribute__((used)). Some compilers wouldn't accept one. 2015-08-28 03:34:33 +00:00
include Added arch extensions and default target features in TargetParser. 2015-09-05 17:05:33 +00:00
lib [SelectionDAG] Swap commutative binops before constant-based folding 2015-09-06 05:42:13 +00:00
projects
resources
test [SelectionDAG] Swap commutative binops before constant-based folding 2015-09-06 05:42:13 +00:00
tools [cmake] rework LLVM_LINK_LLVM_DYLIB option handling 2015-09-05 08:27:33 +00:00
unittests Adding full stops to comments 2015-09-04 15:28:13 +00:00
utils [TableGen] Use make_unique. NFC. 2015-09-06 03:44:50 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt [cmake] rework LLVM_LINK_LLVM_DYLIB option handling 2015-09-05 08:27:33 +00:00
CODE_OWNERS.TXT Add myself as the InstCombine owner. 2015-08-12 22:30:45 +00:00
configure Add an exposed variable for which c++ compiler we're using for our 2015-08-17 22:46:26 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
Makefile
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

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.