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LLVM backend for 6502
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Chandler Carruth aa3cb334af Teach the integer-promotion rewrite strategy to be endianness aware. 
Sorry for this being broken so long. =/

As part of this, switch all of the existing tests to be Little Endian,
which is the behavior I was asserting in them anyways! Add in a new
big-endian test that checks the interesting behavior there.

Another part of this is to tighten the rules abotu when we perform the
full-integer promotion. This logic now rejects cases where there fully
promoted integer is a non-multiple-of-8 bitwidth or cases where the
loads or stores touch bits which are in the allocated space of the
alloca but are not loaded or stored when accessing the integer. Sadly,
these aren't really observable today as the rest of the pass will
already ensure the invariants hold. However, the latter situation is
likely to become a potential concern in the future.

Thanks to Benjamin and Duncan for early review of this patch. I'm still
looking into whether there are further endianness issues, please let me
know if anyone sees BE failures persisting past this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165219 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-04 10:39:28 +00:00
autoconf Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
bindings add support for ocaml 3.12 2012-09-02 14:42:56 +00:00
cmake CMake toolchain file for Android NDK. 2012-09-11 11:54:27 +00:00
docs docs: Fix typo on front page 2012-10-04 04:41:27 +00:00
examples Move llvm/Support/IRBuilder.h -> llvm/IRBuilder.h 2012-06-29 12:38:19 +00:00
include Add method to query for NoCapture attribute. 2012-10-04 07:18:12 +00:00
lib Teach the integer-promotion rewrite strategy to be endianness aware. 2012-10-04 10:39:28 +00:00
projects Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
runtime Add an explicit -object_path_lto flag during linking with a uniquified temporary 2012-10-03 23:52:10 +00:00
test Teach the integer-promotion rewrite strategy to be endianness aware. 2012-10-04 10:39:28 +00:00
tools Add an explicit -object_path_lto flag during linking with a uniquified temporary 2012-10-03 23:52:10 +00:00
unittests Use unsigned long long instead of uin64_t for OS where that matters. 2012-10-03 19:27:25 +00:00
utils Added instregex support to TableGen subtarget emitter. 2012-10-03 23:06:32 +00:00
.gitignore Ignore the documentation-suggested location for compile_commands.json 2012-08-21 19:23:30 +00:00
CMakeLists.txt Removing dependency on third party library for Intel JIT event support. 2012-09-28 17:35:20 +00:00
CODE_OWNERS.TXT Add the list of code owners to the top level of the LLVM source tree to 2012-07-26 08:04:09 +00:00
configure Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
CREDITS.TXT Add IRC handle. 2012-09-11 07:50:40 +00:00
LICENSE.TXT Add YAML parser to Support. 2012-04-03 23:09:22 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Set the 'build clang only' flag when we're building only clang. 2012-10-02 20:32:23 +00:00
Makefile.common [docs] Remove unsupported references to ExtraSource variable. 2012-05-15 21:32:27 +00:00
Makefile.config.in Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
Makefile.rules Make sure 'prefix-clang++' is aliased to 'prefix-clang', not 'clang'. 2012-10-04 00:47:59 +00:00
README.txt test commit 2012-07-11 17:34:12 +00:00

README.txt 

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