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List: cfe-dev
Subject: Re: [cfe-dev] Clang AST
From: caiwei <cworce () 126 ! com>
Date: 2008-04-30 3:43:23
Message-ID: 17914420.661581209527003854.JavaMail.coremail () bj126app12 ! 126 ! com
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在2008-04-29，"Chris Lattner" <clattner@apple.com> 写道：
On Apr 28, 2008, at 10:39 PM, caiwei wrote:
> Hi all,
> I am new to the list and have been lurking a few days. I am interested
> in clang mainly as a possible tool for optimization.If there are any
> suggestions
> for small tasks (TODOs) that may give me a good introduction to
> developing for clang, that would be nice.how can I modify the AST
> for my project?
>
> for example,After changing the AST code of Clang, the clang compiler
> optimize x *2 to x << 2.
> and how to use of the clang AST interface ?
> What sort of optimization are you trying to do? Are you working with
> native code generation, or trying to do a source to source optimizer?
> If you are focused on native code generation, it is much better to
> implement optimizations in the llvm optimizer and/or backend. If you
> are interested in source to source transformations (e.g. outputting a
> modified C file), you can use the AST interfaces and rewriter to do
> this. Take a look at the ObjC Rewriter for examples. If you have a
> specific question, I'd be happy to try to help.
> -Chris
Thanks Chris,
I need to do AST transformations about inerting nodes and setting existing ones,thus \
getting optimum code(source to modified source code). cai
?
?
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<DIV></DIV><BR>在2008-04-29，"Chris Lattner" <clattner@apple.com> 写道：<BR>
<BLOCKQUOTE id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; \
BORDER-LEFT: #ccc 1px solid"><PRE>On Apr 28, 2008, at 10:39 PM, caiwei wrote: > Hi \
all, > I am new to the list and have been lurking a few days. I am interested
> in clang mainly as a possible tool for optimization.If there are any
> suggestions
> for small tasks (TODOs) that may give me a good introduction to
> developing for clang, that would be nice.how can I modify the AST
> for my project?
>
> for example,After changing the AST code of Clang, the clang compiler
> optimize x *2 to x << 2.
> and how to use of the clang AST interface ?
>What sort of optimization are you trying to do? Are you working with
>native code generation, or trying to do a source to source optimizer?
>If you are focused on native code generation, it is much better to
>implement optimizations in the llvm optimizer and/or backend. If you
>are interested in source to source transformations (e.g. outputting a
>modified C file), you can use the AST interfaces and rewriter to do
>this. Take a look at the ObjC Rewriter for examples. If you have a
>specific question, I'd be happy to try to help.
>-Chris</PRE><PRE>Thanks Chris,</PRE><PRE>I need to do AST transformations about \
inerting nodes and setting existing ones,thus getting optimum code(source to modified \
source code).</PRE><PRE>cai<EM> \
</EM></PRE><PRE> </PRE><PRE> </PRE></BLOCKQUOTE><br><!-- footer --><br> \
<hr> <font style="font-size:12px;line-height:15px;">送！送！送！</font><a \
style="font-size:12px;line-height:15px; color:blue; text-decoration:underline;" \
href="http://popme.163.com/link/004290_0422_5595.html">瑞星2008正版半年免费！</a>
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