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LLVM backend for 6502
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3042a65e5f
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Owen Anderson 3042a65e5f Remove a very old instcombine where we would turn sequences of selects into 
logical operations on the i1's driving them.  This is a bad idea for every
target I can think of (confirmed with micro tests on all of: x86-64, ARM,
AArch64, Mips, and PowerPC) because it forces the i1 to be materialized into
a general purpose register, whereas consuming it directly into a select generally
allows it to exist only transiently in a predicate or flags register.

Chandler ran a set of performance tests with this change, and reported no
measurable change on x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201275 91177308-0d34-0410-b5e6-96231b3b80d8
2014-02-12 23:54:07 +00:00
autoconf Add version, arch, system libs, and targets to Makefile.config 2014-02-09 16:36:42 +00:00
bindings Makefile.ocaml: Tweak to use --system-libs. 2013-12-20 00:36:59 +00:00
cmake Teach tablegen() macro to check needed variables 2014-02-12 11:50:11 +00:00
docs Add a note about using "Differential Revision:" in commit messages 2014-02-11 16:58:03 +00:00
examples Don't try to build ExceptionDemo on ARM. 2014-02-12 21:47:15 +00:00
include [Vectorizer] Add a new 'OperandValueKind' in TargetTransformInfo called 2014-02-12 23:43:47 +00:00
lib Remove a very old instcombine where we would turn sequences of selects into 2014-02-12 23:54:07 +00:00
projects llvm/projects/CMakeLists.txt: Add dragonegg. 2014-01-24 12:53:08 +00:00
test Remove a very old instcombine where we would turn sequences of selects into 2014-02-12 23:54:07 +00:00
tools VS Integration: install toolsets for x64 too (PR18738) 2014-02-12 23:26:29 +00:00
unittests Extend RTDyld API to enable optionally precomputing the total amount of memory 2014-02-12 21:30:07 +00:00
utils Remove special case filtering for instructions with lock prefix as they are all marked with isCodeGenOnly already. 2014-02-12 08:09:20 +00:00
.arcconfig
.clang-format
.gitignore Added .DS_Store entry in .gitignore for ignoring .DS_Store files in the source 2014-01-25 15:15:16 +00:00
CMakeLists.txt Fix LLVM install rules to not set permissions on include/ 2014-02-10 10:50:55 +00:00
CODE_OWNERS.TXT Update email address. 2013-12-04 09:42:49 +00:00
configure Add version, arch, system libs, and targets to Makefile.config 2014-02-09 16:36:42 +00:00
CREDITS.TXT Fix documentation typos 2013-12-20 00:33:39 +00:00
LICENSE.TXT Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Provide CMake package modules in install tree 2014-02-09 16:37:02 +00:00
Makefile.common
Makefile.config.in Add version, arch, system libs, and targets to Makefile.config 2014-02-09 16:36:42 +00:00
Makefile.rules Provide CMake package modules in install tree 2014-02-09 16:37:02 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +00:00

README.txt 

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

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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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If you're writing a package for LLVM, see docs/Packaging.rst for our
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