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LLVM backend for 6502
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c17e0cf6c0
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Dan Gohman c17e0cf6c0 Implement "superhero" strength reduction, or full strength 
reduction of address calculations down to basic pointer arithmetic.
This is currently off by default, as it needs a few other features
before it becomes generally useful. And even when enabled, full
strength reduction is only performed when it doesn't increase
register pressure, and when several other conditions are true.

This also factors out a bunch of exisiting LSR code out of
StrengthReduceStridedIVUsers into separate functions, and tidies
up IV insertion. This actually decreases register pressure even
in non-superhero mode. The change in iv-users-in-other-loops.ll
is an example of this; there are two more adds because there are
two fewer leas, and there is less spilling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65108 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-20 04:17:46 +00:00
autoconf Default to building with position independent code. This may increase LLVM's 2009-02-19 06:18:24 +00:00
bindings Rename getABITypeSize to getTypePaddedSize, as 2009-01-12 20:38:59 +00:00
cmake Add mode_t to the config.h generated by cmake on win32. Used by clang. 2009-02-14 16:13:26 +00:00
docs Eliminate several more unnecessary intptr_t casts. 2009-02-18 05:09:16 +00:00
examples reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an 2008-11-21 16:42:48 +00:00
include Add an accessor method to DwarfWriter to tell of debugging info should be emitted. 2009-02-20 00:44:43 +00:00
lib Implement "superhero" strength reduction, or full strength 2009-02-20 04:17:46 +00:00
projects Add "sample" documentation to sample project. 2008-09-15 05:31:29 +00:00
runtime
test Implement "superhero" strength reduction, or full strength 2009-02-20 04:17:46 +00:00
tools really fix style 2009-02-18 17:49:06 +00:00
unittests Fix comment. 2009-02-09 12:31:40 +00:00
utils Add an accessor method to DwarfWriter to tell of debugging info should be emitted. 2009-02-20 00:44:43 +00:00
website
win32 Update hand-crafted VC++ build. 2009-02-02 19:22:02 +00:00
Xcode Remove Stacker.html from Xcode project. 2008-10-14 23:23:59 +00:00
build-for-llvm-top.sh Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
CMakeLists.txt Enable PACKAGE_VERSION in cmake builds, this unbreaks the clang build with cmake. 2009-01-28 17:49:03 +00:00
configure Regenerate. 2009-02-19 06:18:56 +00:00
CREDITS.TXT Adding your's truly to CREDITS.TXT 2009-01-19 15:04:29 +00:00
LICENSE.TXT Renamed Google Test license file from COPYING to LICENSE.TXT to match LLVM 2009-01-05 17:42:15 +00:00
llvm.spec.in
Makefile Add targets to support the installation of clang in isolation. 2009-01-19 19:48:23 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Reapply patch from r62553, with a fix to avoid looking for an ffi.h that isn't 2009-02-04 06:26:47 +00:00
Makefile.rules Avoid order files for now, as they aren't supported in 3.79. 2009-02-12 23:45:11 +00:00
ModuleInfo.txt Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
README.txt

README.txt 

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

This directory and its subdirectories contain source code for the Low Level 
Virtual Machine, 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 HTML documentation provided in docs/index.html for further
assistance with LLVM.