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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
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
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile darwin/cross-build: Unset SDKROOT when building BuildTools. 2012-08-22 22:01:01 +00:00
Makefile.common
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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