similar to: Aliasing and forwarding optimization

The following is legal LLVM code in which ptr, ptr2, and ptr3 are all aliases: %struct = type { int, int } implementation int %p() { %ptr1 = alloca %struct %ptr2 = getelementptr %struct* %ptr1 %ptr3 = getelementptr %struct* %ptr2, uint 0 %pint = getelementptr %struct* %ptr3, uint 0, ubyte 0 %rval = load int* %pint ret int %rval } Should our pass a) ignore this, not replace %ptr1,

quite some speed improvement indeed. attached the updated patch to apply to svn/trunk. j -------------- next part -------------- A non-text attachment was scrubbed... Name: theora-mmx.patch.gz Type: application/x-gzip Size: 8648 bytes Desc: not available Url : http://lists.xiph.org/pipermail/theora-dev/attachments/20040824/5a5f2731/theora-mmx.patch-0001.bin

Hi Danny, Thanks for that :) However I've just updated the prototype patch to NewGVN and it didn't need any API changes - all I rely on is GVNExpression. Hongbin, I wanted to explain a little about what GVNSink can currently do, what it was designed for and hopefully how to make it handle your testcase. *Background* Common code sinking is more difficult to efficently do than one might

Hi R-listers, I am trying to make a trellis boxplot with the HSuccess (y-axis) in each Rayos (beach sections) (x-axis), for each Aeventexhumed (A, B, C) - nesting event. I am not able to do so and keep receiving: Error in eval(expr, envir, enclos) : object 'Rayos' not found Please advise, Jean require(plyr) resp <- read.csv("ABC Arribada R File Dec 12 Jean

Hello, I am trying to calculate the mean value of each row in a data frame (d), I am having troubles and getting errors using the code I have written. Below is a brief example of the code, any thought or suggestions would be great. Thank you for your time, Doug # Example Code: d <- data.frame(st1=c(1,2,3,4), st2=c(2,5,6,7), st3=c(5,5,NA,7), st4=c(6,5,7,8)) avg <-

Hi all, I'm having trouble understanding how llvm determines if pointers alias. Consider the following two functions that each do a redundant load: define float @A(float * noalias %ptr1) {   %ptr2 = getelementptr float* %ptr1, i32 1024   %val1a = load float* %ptr1   store float %val1a, float* %ptr2   %val1b = load float* %ptr1   ret float %val1b } define float @B(float * noalias %ptr1,

​Appreciate all of the quick responses to my ridiculous questions so far. Hoping this one attracts similarly good dis​cussion! Let's say I have the following series of instructions: %a = load i32, i32* %ptr1 %b = load i32, i32* %ptr2 %c = add i32 %a, %b store i32 %c, i32* %ptr3 This gets compiled (roughly) to mov eax, dword ptr [rsp - 4] add eax, dword ptr [rsp - 8] mov dword

On Fri, Oct 7, 2011 at 2:15 PM, andrew adams <andrew.b.adams at gmail.com> wrote: > Hi all, > > I'm having trouble understanding how llvm determines if pointers > alias. Consider the following two functions that each do a redundant > load: > > define float @A(float * noalias %ptr1) { >   %ptr2 = getelementptr float* %ptr1, i32 1024 >   %val1a = load float*

Hi R-users! Can anyone tell me what this error message refers to exactly > a<-c('m','f','m') > b<-c(1:3) > st<-c(1:3) > data.frame(a,b,st) a b st 1 m 1 1 2 f 2 2 3 m 3 3 > data.frame(a,b,st)->l > p<-svydesign(ids=~1, data=l) > pop<-c('(intercept)'=100, st1=10,st2=20) > calibrate(p,~st, pop) Error in

Hi, I?m trying to make a barplot with the following dataframe, with information on relative frequency per sediment type (ST) for some species: Species ST1 ST2 ST3 SP_A 10 60 30 ... At x-axis are (should be ...) the species names and at y-axis the frequency per sediment, in stacked bars. I tried to use barplot command but with no results. Could anyone help me on this? Thanks in

Hello, I've run into a problem which is both maddening and rather hard to replicate, therefore I wondered if someone might know of a plausible explanation for it. I couldn't find anything in the archives, though maybe I'm searching for the wrong thing. I'm calling some C code using .C, and get the vector I'm interested in back as the 7th location in the returned list.

Hi everyone. I'm working on a list of files (about 50 files). I've listed them thanks to the function: list.files. Each of my files contains 35000 lines of data. These files may also contain some missing values NA (sometimes till 10 000 NAs following each other). The aim is to do some correlation matrices between these files (I already have the script). But as I have often missing values,

I imported an SPSS file with its data labels using spss.get (Library(Hmisc). Class = data.frame I then updated some of the spss labels and added a label to the object itself. label (staff.allocation) <- "raw data from the spss file" I then save it as an R object. When I load the object for further work it comes in as Class = "labelled" "data.frame" Then I

Hello everyone, In December, I had started a thread on scoped no-alias metadata in order to represent C99 'restrict' pointer information at the IR level: http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-December/056586.html At this point, we also have another important use case: preserving the existing 'noalias' attributes on pointers after inlining. My original proposal was

Hi, Following is excerpted from dynamic-vector-gep.ll. The resulting "extractelement" seems to always return 0.0f regardless the value idx1 and idx2 is holding. Am I missing something here or there is something fishy take place? Thanks Shuxin 101 ; CHECK: test6 102 ; CHECK: insertelement <4 x float> zeroinitializer, float 1.000000e+00, i32 %idx1 103 ; CHECK:

Hello again, When I had originally discussed this proposal, it was thought that we would not have to worry about control dependencies on the noalias metadata because such dependencies could only present a problem when loads or stores are merged (RAUW is called), and transformations should drop metadata when that happens. Now I'm worried that this is not true. Here's a simple example:

Introduction ============ I'm currently in the middle of what initially looked to be a simple change in GVN but is turning out to have unexpected consequences that are turning out to be quite difficult to resolve, so I thought I'd send out an RFC to make sure that I'm not barking up the wrong tree with how I'm trying to do this. Motivation and current behaviour

On Jan 4, 2011, at 11:08 AM, Villmow, Micah wrote: > I have ran across a case where the function isIdenticalTo is return true for instructions that are not equivalent. The instructions in question are load/store instructions, and is causing a problem with MachineBranchFolding. The problem is this, I have two branches of a switch statement that are identical, except for the size of the store.

Dear R-Helpers, I'm working with immunoassay data and 5PL logistic model. I wanted to experiment with different forms of weighting and parameter selection, which is not possible in instrument software, so I turned to R. I am using R 2.14.2 under Win7 64bit, and the 'nls' library to fit the model - I started with the same model and weighting type (1/y) as in the instrument to see

In v2: - use int instead of bool in the public header - split the tests from the code - don't overload test-layers; instead, add new tests - add a missing fflush exposed by the new tests - other minor cleanups Eric Blake (3): server: Add nbdkit_stdio_safe server: Sanitize stdin/out before running plugin code server: More tests of stdin/out handling docs/nbdkit-plugin.pod |