LLVM backend for 6502
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Chandler Carruth d5003cafd6 A pile of long over-due refactorings here. There are some very, *very*
minor behavior changes with this, but nothing I have seen evidence of in
the wild or expect to be meaningful. The real goal is unifying our logic
and simplifying the interfaces. A summary of the changes follows:

- Make 'callIsSmall' actually accept a callsite so it can handle
  intrinsics, and simplify callers appropriately.
- Nuke a completely bogus declaration of 'callIsSmall' that was still
  lurking in InlineCost.h... No idea how this got missed.
- Teach the 'isInstructionFree' about the various more intelligent
  'free' heuristics that got added to the inline cost analysis during
  review and testing. This mostly surrounds int->ptr and ptr->int casts.
- Switch most of the interesting parts of the inline cost analysis that
  were essentially computing 'is this instruction free?' to use the code
  metrics routine instead. This way we won't keep duplicating logic.

All of this is motivated by the desire to allow other passes to compute
a roughly equivalent 'cost' metric for a particular basic block as the
inline cost analysis. Sadly, re-using the same analysis for both is
really messy because only the actual inline cost analysis is ever going
to go to the contortions required for simplification, SROA analysis,
etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156140 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-04 00:58:03 +00:00
autoconf fix typo 2012-04-30 20:06:58 +00:00
bindings [python] Add negative MemoryBuffer testcase 2012-03-22 11:23:52 +00:00
cmake Add rudimentary CMake logic for detecting Graphviz. 2012-05-03 21:51:05 +00:00
docs Use correct variable in this example. Pointed out by waynix on IRC. 2012-05-03 15:25:19 +00:00
examples Remove llvm-ld and llvm-stub (which is only used by llvm-ld). 2012-04-19 19:27:54 +00:00
include A pile of long over-due refactorings here. There are some very, *very* 2012-05-04 00:58:03 +00:00
lib A pile of long over-due refactorings here. There are some very, *very* 2012-05-04 00:58:03 +00:00
projects Update config.sub in the sample project. 2012-04-27 10:27:32 +00:00
runtime Switch to c-style comments in a C file. 2012-04-27 19:30:29 +00:00
test Fix issues with the ARM bl and blx thumb instructions and the J1 and J2 bits 2012-05-03 22:41:56 +00:00
tools PR12729: Change 'llvm-objdump' to display the available targets. 2012-05-03 23:20:10 +00:00
unittests SmallVector: Don't rely on having an assignment operator around in push_back for POD-like types. 2012-04-29 10:53:29 +00:00
utils Use a shared implementation of getMatchingSuperRegClass(). 2012-05-03 22:49:04 +00:00
.gitignore Add tools/lld to .gitignore. 2012-05-02 21:25:32 +00:00
CMakeLists.txt CMake: Prune redundant LLVM_COMPILER_JOBS from llvm/CMakeLists.txt. HandleLLVMOptions.cmake has it. 2012-04-21 14:50:56 +00:00
configure fix typo 2012-04-30 20:06:58 +00:00
CREDITS.TXT Update the documentation of CellSPU, in case it gets removed in 3.1. 2012-04-29 20:00:55 +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 When cross compiling, install a host version of llvm-config. <rdar://11187889> 2012-04-19 23:19:55 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Add profiling support for Intel Parallel Amplifier XE (VTune) for JITted code in LLVM. 2012-03-13 08:33:15 +00:00
Makefile.rules Remove llvm-ld and llvm-stub (which is only used by llvm-ld). 2012-04-19 19:27:54 +00:00
README.txt test commit 2012-03-20 13:12:38 +00:00

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.