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LLVM backend for 6502
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Bill Wendling e36b47e17b Revert r176154 in favor of a better approach. 
Code generation makes some basic assumptions about the IR it's been given. In
particular, if there is only one 'invoke' in the function, then that invoke
won't be going away. However, with the advent of the `llvm.donothing' intrinsic,
those invokes may go away. If all of them go away, the landing pad no longer has
any users. This confuses the back-end, which asserts.

This happens with SjLj exceptions, because that's the model that modifies the IR
based on there being invokes, etc. in the function.

Remove any invokes of `llvm.donothing' during SjLj EH preparation. This will
give us a CFG that the back-end won't be confused about. If all of the invokes
in a function are removed, then the SjLj EH prepare pass won't insert the bogus
code the relies upon the invokes being there.
<rdar://problem/13228754&13316637>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176677 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-08 02:21:08 +00:00
autoconf configure: remove workaround for gcc's -Wno-maybe-uninitialized 2013-02-13 21:19:39 +00:00
bindings
cmake CMake: Always include the CheckCXXCompilerFlag in HandleLLVMOptions.cmake. 2013-03-02 01:00:40 +00:00
docs Remove tailing whitespaces 2013-03-06 18:24:34 +00:00
examples
include Rename isEarlierInSameTrace to isUsefulDominator. 2013-03-07 23:55:49 +00:00
lib Revert r176154 in favor of a better approach. 2013-03-08 02:21:08 +00:00
projects Print a warning message if compiler-rt can't be built because of old CMake version to make this requirement more visible to users 2013-03-05 14:43:07 +00:00
runtime Remove GCDAProfiling.c. This copy is old, the copy in compiler-rt is newer and 2013-03-07 02:03:08 +00:00
test Revert r176154 in favor of a better approach. 2013-03-08 02:21:08 +00:00
tools Connect LLVM CMake build scripts to LLDB's CMake scripts: 2013-02-28 23:15:15 +00:00
unittests [Support][ErrorOr] Add support for implicit conversion from error code/condition enums. 2013-02-28 01:44:26 +00:00
utils MIsched machine model: tablegen subtarget emitter improvement. 2013-03-01 23:31:26 +00:00
.arcconfig
.gitignore
CMakeLists.txt Revert CMake version bump since we don't actually need 2.8.6 any more. 2013-02-18 11:53:37 +00:00
CODE_OWNERS.TXT
configure configure: remove workaround for gcc's -Wno-maybe-uninitialized 2013-02-13 21:19:39 +00:00
CREDITS.TXT Fix my email address in CREDITS.TXT. 2013-03-01 22:20:03 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Pass CPPFLAGS/CFLAGS/CXXFLAGS from the environment of configure to 2013-02-04 08:15:53 +00:00
Makefile.rules remove an ancient and quaint bit of commented out makefile goo from when 2013-03-08 01:26:10 +00:00
README.txt Revert "Test commit" 2013-02-22 19:19:41 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.