llvm-6502

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Evan Cheng c781a243a3 In some rare cases, the register allocator can spill registers but end up not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However, reloads and restores might be folded into uses / defs and freed registers might not be used at all.

VirtRegMap keeps track of allocations so it knows what's not used. As a horrible hack, the stack coloring can color spill slots with *free* registers. That is, it replace reload and spills with copies from and to the free register. It unfold instructions that load and store the spill slot and replace them with register using variants.

Not yet enabled. This is part 1. More coming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70787 91177308-0d34-0410-b5e6-96231b3b80d8

2009-05-03 18:32:42 +00:00

autoconf

Dummy MSP430 backend

2009-05-03 12:57:15 +00:00

bindings

Fix the JIT bindings for ocaml.

2009-04-30 00:43:39 +00:00

cmake

CMake: Added notes pointing to the LLVM CMake documentation.

2009-04-04 22:52:02 +00:00

docs

HTML-escape '>' as '>' in sample C++ code.

2009-05-01 20:40:51 +00:00

examples

silence a warning.

2009-04-15 00:16:05 +00:00

include

In some rare cases, the register allocator can spill registers but end up not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However, reloads and restores might be folded into uses / defs and freed registers might not be used at all.

2009-05-03 18:32:42 +00:00

lib

2009-05-03 18:32:42 +00:00

projects

Revert r67655 and r67656, as they are breaking the build. I'm

2009-03-25 00:52:11 +00:00

runtime

Drop toy GC runtime.

2009-03-02 03:46:48 +00:00

test

Previously, RecursivelyDeleteDeadInstructions provided an option

2009-05-02 18:29:22 +00:00

tools

Fix a compiler warning on hosts where uint64_t isn't unsigned long long.

2009-05-01 16:33:33 +00:00

unittests

Apply Jeffrey Yasskin's CallbackVH patch, with minor tweaks from me

2009-05-02 21:10:48 +00:00

utils

Make DebugLoc independent of DwarfWriter.

2009-04-30 23:22:31 +00:00

website

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win32

Update hand-crafted VC++ build.

2009-02-02 19:22:02 +00:00

Xcode

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build-for-llvm-top.sh

Patch to build llvm with srcdir != objdir from

2009-01-23 08:42:38 +00:00

CMakeLists.txt

CMake: Added notes pointing to the LLVM CMake documentation.

2009-04-04 22:52:02 +00:00

configure

Regenerate

2009-05-03 13:42:23 +00:00

CREDITS.TXT

Initial test commit

2009-04-28 06:15:00 +00:00

LICENSE.TXT

Another great year for LLVM!

2009-02-26 15:17:13 +00:00

llvm.spec.in

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Makefile

Lets install the manual page with install-clang! Radar 6838692

2009-05-01 01:47:55 +00:00

Makefile.common

Removed trailing whitespace from Makefiles.

2009-01-09 16:44:42 +00:00

Makefile.config.in

Add a --enable-profiling option to configure to build Debug+Profile and

2009-04-17 14:49:22 +00:00

Makefile.rules

Support --with-llvmgccdir and friends in llvmc, take 2.

2009-04-21 19:46:10 +00:00

ModuleInfo.txt

Patch to build llvm with srcdir != objdir from

2009-01-23 08:42:38 +00:00

README.txt

README.txt: test commit w/blank line appended

2009-03-23 21:00:45 +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.

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