similar to: several questions

Hi, Chris I get a new PostDominanceFrontier class by combinating the code of PostDominanceSet/PostDominanceTree/PostDominanceFrontier FunctionPasses. It works very well. BTW: Why the PostDominanceFrontier FunctionPasses does not use the formal argument in runOnFunction(Function &)? Does it gets the Function from PassManager? Thank you. Xia >On Thu, 9 Sep 2004, xia_yimin wrote: >

VorbisHi Any help is appreciate. I have two questions. First, I looked into the vorbis-?-specific and was confused by the floor1 algorithm. I think at last the aim is to derive the piecewise curve with the list X and Y,then when encodering ,why not use the selected point orderly to get the curve ? In other words, the specific use the list of [0,128,64,32,96,16,48,80] , why can not use

Hi Has anybody tell me how to create some new type qualifies in LVM? A type qualify, like "const" in C, is useful for program analysis. I hope that I can set/get the type qualify of any value in a program analysed. Or, if I could add a property to the value class and set/get the property, it is same to add some new type qualifies. So, I simply insert a "int" private

Hi, When I compile httpd-2.0, llvmgcc reports many struct types and macros undeclared, but gnu-gcc can compile httpd-2.0 completely.

Xia, LLVM doesn't really use type qualifiers the way you're thinking about it. In LLVM parlance, types are neither const nor non-const, they just define the fundamental nature of a value. However, LLVM fully supports Constant Values (see include/llvm/Constant.h) and constant global variables (see include/llvm/GlobalVariable.h). You might want to read up on the LLVM IR a bit here:

vorbisHi Sorry if it is too stupid to ask the following questions. I am just confused by the pychoacoustics model. I think the computation in the psy.c is to derive a curve which stands for the threshold for the mdct coefficient. Is it right ? If it is right , then what can we do with the curve ? I refered to several articles and find the aim of most pychoacoustics model was to derive the SMR

Hi Any help is appreciate! These days I studied ogg vorbis encoder with sample rate 44.1kbsp,and I thought the whole chart was as follows: 1. read the PCM data and store them in a buffer 2. do MDCT on those PCM data 3. do FFT on those PCM data 4. use both the FFT and MDCT coefficient to the psychoacustic modle and derive an maximum allowable noise curve, and during this curse ,do the

Dear All: I studied the stereo couple documents and now confused, I wonder why it can be done like that, and what is the principle behind that. I think i am confused perhaps because i have no background knowledge, can you help me out? Also, when doing the T/F transform,we used MDCT, so it means no imaginary part. And i am much puzzled about the angle in the stereo couple,what does it mean?

Hi! Dear all I compressed an audiu(wave) with libvorbis1.1.1 and found that the pre-echo was longer than the one which was compressed with MP3 at the same bitrate(128kbps),I am now confused aboout the pre-echo preventing scheme. Can you tell me what method does Ogg Vorbis adopt besides the auto windowsize switch? Looking forward to your letter! Thank you! ??????? Lisa (^_^)

Hi I hope to use the getAliasSetForPointer(Value *p, unsigned size), the method of AliasSetTracker class, but I donot known what meaning is the argument "size". May somebody tell me? Thanks. Xia ______________________________________ ע������30��������䣨 http://mail.sina.com.cn/chooseMode.html �� ===================================================================

On Mon, 2004-07-121 at 00:51, Reid Spencer wrote: //Xia, //Also, the error that you got in User::~User() looks more like a problem //in your pass than a problem with the members you added to the Value //class. I forgot to "make install" LLVM after "make" LLVM. After doing that, I can set the property which was adding in the Value class. //If you provide a full stack

Why some library functions (such as strcpy,strncpy,etc.) are extended in .bc file? How to keep the originally forms of these library functions in .bc file? Thanks - Xia ______________________________________ ע������30��������䣨 http://mail.sina.com.cn/chooseMode.html �� =================================================================== HP����̨ʽ����������ִ���Ͽ��ж�

I want to find buffer overflows from general C programs, a bit like SAFECode :). To quicken the dataflow analysis, I wished to slice operands of character strings from C program using pgmdepgraph, but now, I thought I have to use def-use and use-def chain. Do you think it has any sense? Xia ______________________________________ ע������30��������䣨 http://mail.sina.com.cn/chooseMode.html ��

I can use the interfaces of AliasAnalysis in my pass, but how to specify the underlaying pass of AliasAnalysis is DSAA? Thanks. Xia ______________________________________ ע������30��������䣨 http://mail.sina.com.cn/chooseMode.html �� =================================================================== 15��HPѸ�۱ʼDZ���ǧԪ,����ǧԪ������� (http://ad4.sina.com.cn/wx/ads/hpzhui823.html)

When analysing a function "fn", my FunctionPass needs some PostDominanceFrontier information of functions which are called by function "fn". getAnalysis<PostDominanceFrontier>() cannot give the information, because it only gives the PostDominanceFrontier information of "fn", not the PostDominanceFrontier information of functions called by "fn".

The llvm I using is llvm-1.2, its cfrontend should be based on gcc-3.4, the system I using is RedHat Linux 9.0, I desire to compile httpd-2.0.51. Xia ______________________________________ ע������30��������䣨 http://mail.sina.com.cn/chooseMode.html �� =================================================================== ��ɽ��կ���������������ջ�֮�ã�

I want to use PgmDependenceGraph pass , but my pass cannot work with PgmDependenceGraph. I tried again in Hello2 pass, and it could not work also. The following is I did with llvm/lib/Transforms/Hello.cpp: 1.insert #include "llvm/Analysis/PgmDependenceGraph.h" in Hello.cpp. 2.insert AU.addRequired<PgmDependenceGraph>() in the getAnalysisUsage(AnalysisUsage &AU) of Hello2.

Hi I download the libvorbis-1.1.1 and use the encoderexample.c and decoderexample.c to drive it. The parameters i used is samplingrate: 44.1kbps, channel number: 2, quality :0.4. Now I want to compare it\\\'s complexity with MPEG-2 AAC, but don\\\'t know how to trace into the lib , can you tell me how to do that or tell me how many

Hi all Have anybody installed Samba on Aix 4.3? I try to install ,but failed. I have download samba 2.0.7 , when I want to run configure according to the Step 1 of Unix_install.txt ,system always report "syntax error". So i can't set env for compiling it. Can anybody help me?, pls write detail install step for Aix4.3. Thx a lot Felix ______________________________________

Hi All, First method:- >library(XML) >theurl <- "http://home.sina.com" >download.file(theurl, "tmp.html") >txt <- readLines("tmp.html") >txt <- htmlTreeParse(txt, error=function(...){}, useInternalNodes = TRUE) >g <- xpathSApply(txt, "//p", function(x) xmlValue(x)) >head(grep(" ", g, value=T)) [1] " |