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LLVM backend for 6502
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Chris Lattner c7d7e0cbe0 make simplifycfg insert an llvm.trap before the 'unreachable' it introduces 
when it detects undefined behavior.  llvm.trap generally codegens into some
thing really small (e.g. a 2 byte ud2 instruction on x86) and debugging this
sort of thing is "nontrivial".  For example, we now compile:

void foo() { *(int*)0 = 42; }

into:

_foo:
	pushl	%ebp
	movl	%esp, %ebp
	ud2

Some may even claim that this is a security hole, though that seems dubious
to me.  This addresses rdar://7958343 - Optimizing away null dereference 
potentially allows arbitrary code execution


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103356 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-08 22:15:59 +00:00
autoconf Overhauled llvm/clang docs builds. Closes PR6613. 2010-05-06 23:45:43 +00:00
bindings add attributes and module level asm to the ocaml bindings, 2010-04-10 17:52:58 +00:00
cmake Tell Valgrind when we modify already-executed machine code so it knows 2010-03-15 04:57:55 +00:00
docs Document graphviz passes for the (post) dominator tree. 2010-05-07 09:33:18 +00:00
examples Remove the -enable-sjlj-eh option, which doesn't do anything. 2010-05-02 15:36:26 +00:00
include break coff symbol definition stuff out into proper MCStreamer callbacks, 2010-05-08 19:54:22 +00:00
lib make simplifycfg insert an llvm.trap before the 'unreachable' it introduces 2010-05-08 22:15:59 +00:00
projects Testing subversion commit access 2010-02-23 15:11:17 +00:00
runtime Delete a blank line. 2010-04-16 13:32:55 +00:00
test make simplifycfg insert an llvm.trap before the 'unreachable' it introduces 2010-05-08 22:15:59 +00:00
tools don't pass -f to llc, it doesn't have it anymore. Patch by Kevin Fan (PR7090) 2010-05-07 16:27:04 +00:00
unittests Update BitVectorTest.cpp to stay in sync with SmallBitVectorTest.cpp, 2010-04-30 20:50:28 +00:00
utils Eliminated the classification of control registers into %ecr_ 2010-05-06 20:59:00 +00:00
website Prepare for "core" website. 2007-08-03 05:43:35 +00:00
build-for-llvm-top.sh Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
CMakeLists.txt CMake: Add options for using static runtime on MSVC++ build. 2010-03-18 13:52:05 +00:00
configure Overhauled llvm/clang docs builds. Closes PR6613. 2010-05-06 23:45:43 +00:00
CREDITS.TXT Adding the MicroBlaze backend. 2010-02-23 19:15:24 +00:00
LICENSE.TXT 2010 is upon us. 2010-01-09 18:40:31 +00:00
llvm.spec.in * llvm.spec.in: update blurb 2007-07-13 09:48:29 +00:00
Makefile Update for CIndex rename. 2010-04-30 23:36:47 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Overhauled llvm/clang docs builds. Closes PR6613. 2010-05-06 23:45:43 +00:00
Makefile.rules Don't use 'else ifdef', I guess this is a 3.81 feature? 2010-04-30 22:00:17 +00:00
ModuleInfo.txt Patch to build llvm with srcdir != objdir from 2009-01-23 08:42:38 +00:00
README.txt Give packagers some advice about how to build LLVM so it's useful to 2010-02-26 00:54:42 +00:00

README.txt 

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