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LLVM backend for 6502
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b4b8b0cc90
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Eli Friedman b4b8b0cc90 Add a target-specific branchless method for double-width relational 
comparisons on x86.  Essentially, the way this works is that SUB+SBB sets
the relevant flags the same way a double-width CMP would.

This is a substantial improvement over the generic lowering in LLVM. The output
is also shorter than the gcc-generated output; I haven't done any detailed
benchmarking, though.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127852 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-18 02:34:11 +00:00
autoconf Check that the AsmParser exists for the native target to enable initialization 2011-03-14 22:12:35 +00:00
bindings
cmake is_llvm_target_library: recognize libraries without the LLVM prefix. 2011-03-15 14:53:53 +00:00
docs Change the signext language in LangRef to closer match zeroext. 2011-03-17 14:21:58 +00:00
examples
include Augment CrashRecoveryContext to have registered "cleanup" objects that can be used to release resources during a crash. 2011-03-18 02:05:11 +00:00
lib Add a target-specific branchless method for double-width relational 2011-03-18 02:34:11 +00:00
projects
runtime
test Add a target-specific branchless method for double-width relational 2011-03-18 02:34:11 +00:00
tools Use RequiresNullTerminator to create buffers without a null terminator 2011-03-17 22:18:42 +00:00
unittests Add an argument to APInt's magic udiv calculation to specify the number of bits that are known zero in the divided number. 2011-03-17 20:39:06 +00:00
utils lit/ProgressBar.py: [PR7919] Improve line wrap for XN-incapable terminals. 2011-03-15 21:07:44 +00:00
website
.gitignore
build-for-llvm-top.sh
CMakeLists.txt Change the next release number to 3.0svn. 2011-03-08 03:00:02 +00:00
configure Check that the AsmParser exists for the native target to enable initialization 2011-03-14 22:12:35 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
Makefile
Makefile.common
Makefile.config.in
Makefile.rules Makefile.rules: [PR2928] "make install" may install include files along explicit pattern, not to install CMake's building stuff. 2011-03-09 09:11:27 +00:00
ModuleInfo.txt
README.txt Test commit. 2011-02-11 19:11:57 +00:00

README.txt 

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

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