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LLVM backend for 6502
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11da4cf25c
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Chris Lattner 11da4cf25c Reimplement MemoryBuffer::getFile with three enhancements: 
1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49031 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-01 06:05:21 +00:00
autoconf Adding ocamldoc generation. 2008-03-10 15:49:16 +00:00
bindings Expose Function::viewCFG and Function::viewCFGOnly to bindings. 2008-03-31 16:22:09 +00:00
docs Add a unified 'generated documentation' target so the web site script has a consistent target to use. 2008-03-31 17:27:57 +00:00
examples Fix an incorrect comment, PR2147. 2008-03-13 03:29:42 +00:00
include Stub out some sys::Path::MapInFilePages/UnMapFilePages methods. 2008-04-01 06:00:12 +00:00
lib Reimplement MemoryBuffer::getFile with three enhancements: 2008-04-01 06:05:21 +00:00
projects
runtime
test More soft fp fixes. 2008-04-01 02:18:22 +00:00
tools stop building llvmc. 2008-03-30 18:58:05 +00:00
utils Simplify the conversion from "0x" numbers to a single digit number. 2008-03-28 06:22:23 +00:00
website
win32 Updating win32 VStudio project files with new file references and removing dead references. 2008-03-27 00:02:53 +00:00
Xcode Update project to reflect deleted files. 2008-03-23 16:49:47 +00:00
build-for-llvm-top.sh
configure Regenerate. 2008-03-10 15:49:38 +00:00
CREDITS.TXT Add Mikhail to credits file 2008-03-23 08:58:32 +00:00
LICENSE.TXT
llvm.spec.in
Makefile a happier version of happiness 2008-03-21 22:17:07 +00:00
Makefile.common
Makefile.config.in Reverting r48974. See PR2183 for details. 2008-03-31 16:46:23 +00:00
Makefile.rules Refresh Makefile.ocaml in objdir if it is modified in srcdir. 2008-03-10 15:58:40 +00:00
ModuleInfo.txt
README.txt

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level 
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the HTML documentation provided in docs/index.html for further
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