llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-22 09:29:31 +00:00

LLVM backend for 6502

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Chandler Carruth 02e92a0b5d Switch to a signed representation for the dynamic offsets while walking across the uses of the alloca. It's entirely possible for negative numbers to come up here, and in some rare cases simply doing the 2's complement arithmetic isn't the correct decision. Notably, we can't zext the index of the GEP. The definition of GEP is that these offsets are sign extended or truncated to the size of the pointer, and then wrapping 2's complement arithmetic used. This patch fixes an issue that comes up with no input from the buildbots or bootstrap afaict. The only place where it manifested, disturbingly, is Clang's own regression test suite. A reduced and targeted collection of tests are added to cope with this. Note that I've tried to pin down the potential cases of overflow, but may have missed some cases. I've tried to add a few cases to test this, but its hard because LLVM has quite limited support for >64bit constructs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164475 91177308-0d34-0410-b5e6-96231b3b80d8		2012-09-23 11:43:14 +00:00
autoconf	Add an --enable-backtraces option to configure to determine	2012-09-21 23:03:29 +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 long-standing typo in yaml2obj.rst.	2012-09-21 19:48:16 +00:00
examples	Move llvm/Support/IRBuilder.h -> llvm/IRBuilder.h	2012-06-29 12:38:19 +00:00
include	Add LLVM_OVERRIDE to methods that override their base classes.	2012-09-23 02:12:10 +00:00
lib	Switch to a signed representation for the dynamic offsets while walking	2012-09-23 11:43:14 +00:00
projects	[CMake] Respect LLVM_BUILD_RUNTIME.	2012-09-21 22:49:06 +00:00
runtime	libprofile: [CMake] Let libprofile_rt be not loadable_module but shared library. Autoconf's one does so.	2012-08-29 00:37:51 +00:00
test	Switch to a signed representation for the dynamic offsets while walking	2012-09-23 11:43:14 +00:00
tools	Make sure lli compiles all code before invalidating instruction caches.	2012-09-20 08:46:30 +00:00
unittests	This patch adds memory support functions which will later be used to implement section-specific protection handling in MCJIT.	2012-09-19 20:46:12 +00:00
utils	Machine Model (-schedmodel only). Added SchedAliases.	2012-09-22 02:24:21 +00:00
.gitignore	Ignore the documentation-suggested location for compile_commands.json	2012-08-21 19:23:30 +00:00
CMakeLists.txt	enable cross compilation with cmake	2012-08-20 19:56:52 +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	Add an --enable-backtraces option to configure to determine	2012-09-21 23:03:29 +00:00
CREDITS.TXT	Add IRC handle.	2012-09-11 07:50:40 +00:00
LICENSE.TXT
llvm.spec.in	Tidy up. s/Low Level Virtual Machine/LLVM/.	2012-01-25 22:00:23 +00:00
LLVMBuild.txt
Makefile	darwin/cross-build: Unset SDKROOT when building BuildTools.	2012-08-22 22:01:01 +00:00
Makefile.common	[docs] Remove unsupported references to ExtraSource variable.	2012-05-15 21:32:27 +00:00
Makefile.config.in	Temporarily revert this to bring back the bots.	2012-08-28 01:17:46 +00:00
Makefile.rules	Temporarily revert this to bring back the bots.	2012-08-28 01:17:46 +00:00
README.txt	test commit	2012-07-11 17:34:12 +00:00

README.txt

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

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