llvm-6502

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LLVM backend for 6502

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Chandler Carruth 2e38cf961d Introduce a loop block rotation optimization to the new block placement pass. This is designed to achieve one of the important optimizations that the old code placement pass did, but more simply. This is a somewhat rough and very conservative version of the transform. We could get a lot fancier here if there are profitable cases to do so. In particular, this only looks for a single pattern, it insists that the loop backedge being rotated away is the last backedge in the chain, and it doesn't provide any means of doing better in-loop placement due to the rotation. However, it appears that it will handle the important loops I am finding in the LLVM test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145158 91177308-0d34-0410-b5e6-96231b3b80d8		2011-11-27 00:38:03 +00:00
autoconf	Add configure checking for pread(2) and use it to save a syscall when reading files.	2011-11-22 12:31:53 +00:00
bindings	Minor fixes in Makefiles for the OCaml bindings:	2011-11-09 12:00:39 +00:00
cmake	Add configure checking for pread(2) and use it to save a syscall when reading files.	2011-11-22 12:31:53 +00:00
docs	Move the branch probability blurb into the optimizer section. Add a minimal bullet for AVX.	2011-11-26 11:14:54 +00:00
examples	build: Add initial cut at LLVMBuild.txt files.	2011-11-03 18:53:17 +00:00
include	This patch contains support for encoding FMA4 instructions and	2011-11-25 19:33:42 +00:00
lib	Introduce a loop block rotation optimization to the new block placement	2011-11-27 00:38:03 +00:00
projects	build: Add initial cut at LLVMBuild.txt files.	2011-11-03 18:53:17 +00:00
runtime	PathProfiling.c: Get rid of using "inline". We may expect compiler shall optimize out "static" scope w/o "inline".	2011-11-08 12:03:14 +00:00
test	Introduce a loop block rotation optimization to the new block placement	2011-11-27 00:38:03 +00:00
tools	Point to libLTO with -L/PATH/ -lLTO so that it is found in the install	2011-11-23 03:07:25 +00:00
unittests	Fix APFloat::convert so that it handles narrowing conversions correctly; it	2011-11-26 03:38:02 +00:00
utils	Remove some unnecessary filtering checks from X86 disassembler table build.	2011-11-19 05:48:20 +00:00
.gitignore	git: Add tools/lldb to the ignore list.	2011-11-10 22:55:50 +00:00
CMakeLists.txt	Revert r144300 "llvm-config: Replace with C++ version (was llvm-config-2).",	2011-11-10 19:59:35 +00:00
configure	Add configure checking for pread(2) and use it to save a syscall when reading files.	2011-11-22 12:31:53 +00:00
CREDITS.TXT	CREDITS.TXT: Add a line. (test commit)	2011-10-29 23:42:14 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt	build: Add initial cut at LLVMBuild.txt files.	2011-11-03 18:53:17 +00:00
Makefile	Merge the install-clang-c target into install-clang. <rdar://problem/10217046>	2011-11-27 00:26:22 +00:00
Makefile.common
Makefile.config.in	build/Make: Define a TARGET_NATIVE_ARCH variable to be a bit more precise than	2011-11-12 00:18:02 +00:00
Makefile.rules	build/Make: Switch over to using llvm-config-2 for dependencies one more (hopefully last) time, now that it also builds as a build tool.	2011-11-14 17:17:45 +00:00
README.txt	Undo test commit	2011-11-22 20:05:48 +00:00

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