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LLVM backend for 6502
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69e067fdd8
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Chris Lattner 69e067fdd8 Make jump threading substantially more powerful, in the following ways: 
1. Make it fold blocks separated by an unconditional branch.  This enables
   jump threading to see a broader scope.
2. Make jump threading able to eliminate locally redundant loads when they
   feed the branch condition of a block.  This frequently occurs due to
   reg2mem running.
3. Make jump threading able to eliminate *partially redundant* loads when
   they feed the branch condition of a block.  This is common in code with
   lots of loads and stores like C++ code and 255.vortex.

This implements thread-loads.ll and rdar://6402033.

Per the fixme's, several pieces of this should be moved into Transforms/Utils.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60148 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 05:07:53 +00:00
autoconf Revert accidental last patch 2008-11-20 04:28:08 +00:00
bindings
cmake CMake: Do not rebuild the world when tblgen changes but the .inc files 2008-11-21 00:18:45 +00:00
docs Small formatting change. 2008-11-26 19:19:05 +00:00
examples reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an 2008-11-21 16:42:48 +00:00
include On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size. 2008-11-27 00:49:46 +00:00
lib Make jump threading substantially more powerful, in the following ways: 2008-11-27 05:07:53 +00:00
projects
runtime
test Make jump threading substantially more powerful, in the following ways: 2008-11-27 05:07:53 +00:00
tools Disallow multiple edges. 2008-11-26 22:59:45 +00:00
utils On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size. 2008-11-27 00:49:46 +00:00
website
win32 Add files to VC++ projects. 2008-11-13 21:18:54 +00:00
Xcode
build-for-llvm-top.sh
CMakeLists.txt CMake: Option for building with -fPIC. 2008-11-20 19:13:51 +00:00
configure Add XCore backend. 2008-11-07 10:59:00 +00:00
CREDITS.TXT Keep CREDITS.TXT sorted by name. 2008-11-07 12:44:36 +00:00
LICENSE.TXT
llvm.spec.in
Makefile Proper way of doing llvm canadian-cross compilation. 2008-11-10 07:33:13 +00:00
Makefile.common
Makefile.config.in Use spaces rather than tab. 2008-10-22 09:42:14 +00:00
Makefile.rules Move target independent td files from lib/Target/ to include/llvm/Target so they can be distributed along with the header files. 2008-11-24 07:34:46 +00:00
ModuleInfo.txt
README.txt

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