LLVM backend for 6502
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Chris Lattner c1526a9da1 Fix a major pessimization in the instcombiner. If an allocation instruction
is only used by a cast, and the casted type is the same size as the original
allocation, it would eliminate the cast by folding it into the allocation.

Unfortunately, it was placing the new allocation instruction right before
the cast, which could pull (for example) alloca instructions into the body
of a function.  This turns statically allocatable allocas into expensive
dynamically allocated allocas, which is bad bad bad.

This fixes the problem by placing the new allocation instruction at the same
place the old one was, duh. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13289 91177308-0d34-0410-b5e6-96231b3b80d8
2004-04-30 04:37:52 +00:00
autoconf Refactor external benchmark checking stuff into one hairy 2004-04-16 17:13:33 +00:00
docs bug fixed 2004-04-21 18:52:06 +00:00
examples/ModuleMaker Configure script for ModuleMaker. 2003-11-25 20:02:07 +00:00
include Add machine-CFG graph traits specializations. 2004-04-29 17:43:55 +00:00
lib Fix a major pessimization in the instcombiner. If an allocation instruction 2004-04-30 04:37:52 +00:00
projects If we're going to use tabs, use them consistently. Maybe doxygen will find the 2004-04-15 15:38:48 +00:00
runtime Fit comment into 80 cols. 2004-04-16 17:13:52 +00:00
test Add a new testcase for X/-1, fix bug that prevented tests from running right 2004-04-26 14:01:47 +00:00
tools Teach bugpoint to be a little bit smarter and avoid repeating work 2004-04-23 20:36:51 +00:00
utils Added `zeroinitializer' keyword. 2004-04-28 19:36:08 +00:00
.cvsignore Ok, try #2, this time I'll not be stupid 2003-08-03 18:33:24 +00:00
configure Regenerated using autoconf-2.57. 2004-04-16 17:13:44 +00:00
CREDITS.TXT Added Stacker to Reid Spencer's list of contributions. 2003-12-17 18:15:04 +00:00
LICENSE.TXT We actually don't have spiff anymore 2004-04-13 20:59:47 +00:00
llvm.spec RPM spec file for LLVM tools and libraries. 2004-02-10 03:57:51 +00:00
llvm.spec.in RPM spec file for LLVM tools and libraries. 2004-02-10 03:57:51 +00:00
Makefile Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.common Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.config.in Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
Makefile.rules Standardize header comments of top-level Makefiles. 2004-04-24 00:10:56 +00:00
README.txt Merged in RELEASE_1. 2003-10-27 18:02:06 +00:00

                       The LLVM Compiler Infrastructure
                           http://llvm.cs.uiuc.edu

Welcome to LLVM!
----------------
This file is intended to do four things:
(1) help you get started using LLVM;
(2) tell you how to get questions about LLVM answered;
(3) tell you where to find documentation for different kinds of questions; and
(4) tell you about three LLVM-related mailing lists.


Getting Started with LLVM
-------------------------

(1) For license information:
    llvm/LICENSE.txt

(2) Installing and compiling LLVM:
    llvm/docs/GettingStarted.html

(3) Learn about features and limitations of this release:
    llvm/docs/ReleaseNotes.html

(4) Learn how to write a pass within the LLVM system:
	llvm/docs/WritingAnLLVMPass.html

(5) Learn how to start a new development project using LLVM, where your
    new source code can live anywhere (outside or inside the LLVM tree),
    while using LLVM header files and libraries:
    llvm/docs/Projects.html


Getting Help with LLVM
----------------------

(1) If you have questions or development problems not answered in the
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(2) To report a bug, submit a bug report as described in the document:
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(3) We now use Bugzilla to track bugs, so you can check the status of
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LLVM Documentation
------------------

All the documents mentioned below except the design overview tech report
are included as part of the LLVM release (in llvm/docs/*):

LLVM Design Overview:
    LLVM : A Compilation Framework for Lifelong Program Analysis
    and Transformation:
        http://llvm.cs.uiuc.edu/pubs/2003-09-30-LifelongOptimizationTR.html

LLVM User Guides:

    Download and Installation Instructions:
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    LLVM Command Guide:
        llvm/docs/CommandGuide/index.html

    LLVM Assembly Language:
        llvm/docs/LangRef.html

    LLVM Test Suite Guide:
        llvm/docs/TestingGuide.html

LLVM Programming Documentation:

    LLVM Programmers Manual:
        llvm/docs/ProgrammersManual.html

    Writing an LLVM Pass:
        llvm/docs/WritingAnLLVMPass.html

    Alias Analysis in LLVM:
        llvm/docs/AliasAnalysis.html

    Command Line Library:
        llvm/docs/CommandLine.html

    Coding Standards:
        llvm/docs/CodingStandards.html

Other LLVM Resources:

    Submitting a Bug:
        http://llvm.cs.uiuc.edu/docs/HowToSubmitABug.html

    Open Projects:
        llvm/docs/OpenProjects.html

    Creating a new LLVM Project:
        llvm/docs/Projects.html

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