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LLVM backend for 6502
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Philip Reames 456b7b602c Loading from null is valid outside of addrspace 0 
This patches fixes a miscompile where we were assuming that loading from null is undefined and thus we could assume it doesn't happen.  This transform is perfectly legal in address space 0, but is not neccessarily legal in other address spaces.

We really should introduce a hook to control this property on a per target per address space basis.  We may be loosing valuable optimizations in some address spaces by being too conservative.

Original patch by Thomas P Raoux (submitted to llvm-commits), tests and formatting fixes by me.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224961 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-29 22:46:21 +00:00
autoconf [multilib] Add support to the autoconf build to substitute 2014-12-29 11:58:17 +00:00
bindings [OCaml] Expose Llvm_executionengine.get_{global_value,function}_address. 2014-12-24 01:52:51 +00:00
cmake [cmake] Push LLVM_LIBDIR_SUFFIX through to the LLVMConfig.cmake file 2014-12-29 11:16:23 +00:00
docs Fixed 2 minor typos in the documentation. 2014-12-29 09:47:51 +00:00
examples Once more on the cmake build. nativecodegen->native on the dependencies. 2014-12-08 18:24:06 +00:00
include Add segmented stack support for DragonFlyBSD. 2014-12-29 15:47:28 +00:00
lib Loading from null is valid outside of addrspace 0 2014-12-29 22:46:21 +00:00
projects
test Loading from null is valid outside of addrspace 0 2014-12-29 22:46:21 +00:00
tools [cmake] Teach the llvm-config program to respect LLVM_LIBDIR_SUFFIX. 2014-12-29 11:16:25 +00:00
unittests [cmake] Start making LLVM_LIBDIR_SUFFIX effective by adding it to 2014-12-29 11:16:19 +00:00
utils Masked Load/Store - Changed the order of parameters in intrinsics. 2014-12-25 07:49:20 +00:00
.arcconfig
.clang-format
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt [py3] Teach the CMake build to reject Python versions older than 2.7. 2014-12-29 19:36:05 +00:00
CODE_OWNERS.TXT Add myself as SystemZ code owner 2014-12-18 19:27:50 +00:00
configure [multilib] Add support to the autoconf build to substitute 2014-12-29 11:58:17 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
README.txt [TEST-COMMIT] As per Developer Policy, Added a blank line. 2014-12-06 00:38:39 +00:00

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