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LLVM backend for 6502
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Hal Finkel 82b3821208 Eliminate redundant CR moves on PPC32. 
The 32-bit ABI requires CR bit 6 to be set if the call has fp arguments and
unset if it doesn't. The solution up to now was to insert a MachineNode to
set/unset the CR bit, which produces a CR vreg. This vreg was then copied
into CR bit 6. When the register allocator saw a bunch of these in the same
function, it allocated the set/unset CR bit in some random CR register (1
extra instruction) and then emitted CR moves before every vararg function
call, rather than just setting and unsetting CR bit 6 directly before every
vararg function call. This patch instead inserts a PPCcrset/PPCcrunset
instruction which are then matched by a dedicated instruction pattern.

Patch by Tobias von Koch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162725 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-28 02:10:27 +00:00
autoconf Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +00:00
bindings Remove tabs. 2012-07-19 00:23:13 +00:00
cmake enable cross compilation with cmake 2012-08-20 19:56:52 +00:00
docs Change the linker_private_weak_def_auto' linkage to linkonce_odr_auto_hide' to 2012-08-17 18:33:14 +00:00
examples Move llvm/Support/IRBuilder.h -> llvm/IRBuilder.h 2012-06-29 12:38:19 +00:00
include Remove the the block_node_iterator of Region, replace it by the block_iterator. 2012-08-27 13:49:24 +00:00
lib Eliminate redundant CR moves on PPC32. 2012-08-28 02:10:27 +00:00
projects Fix a typo (the the => the) 2012-07-23 08:51:15 +00:00
runtime Profile: move a single enum out of ProfileInfoTypes.h into a new 2012-08-24 18:31:44 +00:00
test Eliminate redundant CR moves on PPC32. 2012-08-28 02:10:27 +00:00
tools Add basic support for .debug_ranges section to LLVM's DebugInfo library. 2012-08-27 07:17:47 +00:00
unittests Don't pass a null pointer to cast<> in its unit tests. 2012-08-21 20:39:25 +00:00
utils Fix integer undefined behavior due to signed left shift overflow in LLVM. 2012-08-24 23:29:28 +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 Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +00:00
CREDITS.TXT Alphabetize. 2012-06-19 23:47:58 +00:00
LICENSE.TXT Add YAML parser to Support. 2012-04-03 23:09:22 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
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)
================================

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 HTML documentation provided in docs/index.html for further
assistance with LLVM.

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