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LLVM backend for 6502
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Jakob Stoklund Olesen 9bbe4d6c00 Clean up the handling of the x87 fp stack to make it more robust. 
Drop the FpMov instructions, use plain COPY instead.

Drop the FpSET/GET instruction for accessing fixed stack positions.
Instead use normal COPY to/from ST registers around inline assembly, and
provide a single new FpPOP_RETVAL instruction that can access the return
value(s) from a call. This is still necessary since you cannot tell from
the CALL instruction alone if it returns anything on the FP stack. Teach
fast isel to use this.

This provides a much more robust way of handling fixed stack registers -
we can tolerate arbitrary FP stack instructions inserted around calls
and inline assembly. Live range splitting could sometimes break x87 code
by inserting spill code in unfortunate places.

As a bonus we handle floating point inline assembly correctly now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134018 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-28 18:32:28 +00:00
autoconf build/configure: Add support for --with-extra-ld-options flag (to provide extra 2011-06-16 22:30:38 +00:00
bindings Fix compiling the ocaml kaleidoscope tutorials 2011-02-09 18:32:02 +00:00
cmake Update CMake library dependencies. 2011-06-25 02:10:19 +00:00
docs Document nonlazybind. 2011-06-16 16:03:13 +00:00
examples Modify comment. 2011-06-09 20:11:46 +00:00
include PR10210: New method ConstantArray::getAsCString(). Use it in LTO to 2011-06-28 08:24:19 +00:00
lib Clean up the handling of the x87 fp stack to make it more robust. 2011-06-28 18:32:28 +00:00
projects Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
runtime Fix build for (some versions of?) MinGW. Patch by Ruben Van Boxem. 2011-06-23 18:24:27 +00:00
test Clean up the handling of the x87 fp stack to make it more robust. 2011-06-28 18:32:28 +00:00
tools Reinstate r133516 "Remove some unnecessary uses of c_str()." A trailing null 2011-06-28 18:26:12 +00:00
unittests Fix the implementation of ConstantRange::sub(ConstantRange). Patch by Xi Wang! 2011-06-22 21:13:46 +00:00
utils Alternative name enum should go into the enum portion. 2011-06-28 01:36:01 +00:00
website
.gitignore Ignore Vim swap files 2011-05-31 21:54:28 +00:00
build-for-llvm-top.sh
CMakeLists.txt Rename profile_rt.so to libprofile_rt.so under configure+make (it already was 2011-04-29 02:12:06 +00:00
configure Regenerate configure. 2011-06-16 22:30:41 +00:00
CREDITS.TXT Another git svn dcommit test. This time let's hope it doesn't kill my repo. 2010-12-10 14:45:10 +00:00
LICENSE.TXT Happy new year. 2011-06-12 15:26:54 +00:00
llvm.spec.in
Makefile Install libprofile_rt.dylib where it's more available for gcov support. 2011-06-10 21:47:14 +00:00
Makefile.common
Makefile.config.in build/configure: Add support for --with-extra-ld-options flag (to provide extra 2011-06-16 22:30:38 +00:00
Makefile.rules Starting to refactor Target to separate out code that's needed to fully describe 2011-06-24 01:44:41 +00:00
ModuleInfo.txt Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt reverting test commit 2011-05-12 17:38:08 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
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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 HTML documentation provided in docs/index.html for further
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