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LLVM backend for 6502
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Tim Northover 4e399f4500 ARM: rework Thumb1 frame index rewriting 
The previous code had a few problems, motivating the choices here.

1. It could create instructions clobbering CPSR, but the incoming MachineInstr
   didn't reflect this. A potential source of corruption. This is why the patch
   has a new PseudoInst for before lowering.
2. Similarly, there was some code to handle the incoming instruction not being
   ARMCC::AL, but this would have caused massive problems if it was actually
   invoked when a complex offset needing more than one instruction was requested.
3. It wasn't designed to handle unaligned pointers (or offsets). These should
   probably be minimised anyway, but the code needs to deal with them properly
   regardless.
4. It had some rather dubious ad-hoc code to avoid calling
   emitThumbRegPlusImmediate, a function which should be designed to do precisely
   this job.

We seem to cover the common cases correctly now, and hopefully can enhance
emitThumbRegPlusImmediate to handle any extra optimisations we need to add in
future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220236 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-20 21:28:41 +00:00
autoconf Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
bindings Fix bashism in build.sh. 2014-10-17 02:20:40 +00:00
cmake Revert r220174, "Always use -Wl,-gc-sections on our build." 2014-10-20 12:12:21 +00:00
docs [llvm-symbolizer] Introduce the -dsym-hint option. 2014-10-17 00:50:19 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include Try to fix GCC error about invalid use of const_cast in const version of ErrorOr::get() 2014-10-20 20:41:21 +00:00
lib ARM: rework Thumb1 frame index rewriting 2014-10-20 21:28:41 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test ARM: rework Thumb1 frame index rewriting 2014-10-20 21:28:41 +00:00
tools Add a test that would have found the bug in r219829. 2014-10-17 01:34:23 +00:00
unittests [ADT] Add a 'find_as' operation to DenseSet. 2014-10-19 19:36:33 +00:00
utils Teach Lit to catch OSError exceptions when creating a process during the 2014-10-20 20:14:28 +00:00
.arcconfig
.clang-format
.clang-tidy Add .clang-tidy configuration file to provide LLVM-optimized defaults for 2014-09-08 13:30:00 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Add LLVM_ENABLE_MODULES flag to CMake to enable building with C++ modules. 2014-09-26 22:40:15 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure Initial version of Go bindings. 2014-10-16 22:48:02 +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 Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
Makefile.rules Revert my earlier change to add "all" as a dependency to check. In 2014-09-19 18:44:27 +00:00
README.txt

README.txt 

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