similar to: [LLVMdev] Handling of pointer difference in llvm-gcc and clang

Hi Stephan, > We are developing a bounded model checker for C/C++ programs > (http://baldur.iti.kit.edu/llbmc/) that operates on LLVM's intermediate > representation. While checking a C++ program that uses STL containers > we noticed that llvm-gcc and clang handle pointer differences in > disagreeing ways. > > Consider the following C function: > int f(int *p, int *q)

Perhaps some of you might be interested in this: -- Carsten ################################################################## *---------------------------------------------------* * LLBMC: The Low-Level Bounded Model Checker * * for C (and C++) programs is now available! * * Version 2012.1 * *

Full_Name: Manuel Luethi Version: 2.9.1 OS: Windows XP Submission from: (NULL) (129.132.128.136) Hi I created the following vectors: p_1=c(0.2,0.2,0.2,0.2,0.1,0.25,0.4,0.1,0.25,0.4,0.1,0.25,0.4,0.1,0.25,0.4,0.2,0.5,0.8,0.2,0.5,0.8,0.2,0.5,0.8,0.2,0.5,0.8) p_2=c(0,0,0,0,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.4,0.25,0.1,0.4,0.25,0.1,0.4,0.25,0.1,0.4,0.25,0.1) As these are

On Tue, Feb 7, 2012 at 4:58 AM, Carsten Sinz <carsten.sinz at kit.edu> wrote: > Perhaps some of you might be interested in this: > -- Carsten > > > ################################################################## > > *---------------------------------------------------* > * LLBMC: The Low-Level Bounded Model Checker * > * for C (and C++)

hey, my function doesn?t work. can somebody help me? the graphic doesn?t work and also the function. thnx a lot. N=10 n=100 p_0=c(1/5,1-1/5) power = function(p,m) { set.seed(1000) H=matrix(0,nrow=N,ncol=1) for(i in 1:N) { x <- matrix(rnorm(n, 0, 0.5), ncol = m) y <- matrix(rnorm(n, 0, 0.8), ncol = m) l <- diag(cor(x, y)) q_1 = qnorm(0.05, 0, 0.05) q_2 = qnorm(1 - 0.05, 0, 0.05)

This looks very interesting. Do you plan to make the source code publicly available? -Hal On Tue, 2012-02-07 at 01:58 +0100, Carsten Sinz wrote: > Perhaps some of you might be interested in this: > -- Carsten > > > > > ################################################################## > > > *---------------------------------------------------* > *

LLBMC http://llbmc.org uses bounded model checking technique to find errors in LLVM IR.Model checking is essentially search, and since LLBMC is bounded, the search for errors is usuallyincomplete, hence the approach may not verify the entire program, however, it may be goodenough to find interesting errors. Best wishes,Andrew On Monday, 8 February 2016, 21:54, Scott Santucci via llvm-dev

Hello, all, My name is Scott Santucci and I'm a software developer kicking around various wild ideas. (I wish I had something more interesting to say about myself than that, but nothing comes to mind; my day job is in SQL and Java, nothing to do with LLVM.) I am wondering whether anyone has tried using LLVM to apply formal verification to program code. I'm thinking about trying to

I'd just like to thank everyone who replied on this; the suggestions and resources are very helpful! ~Scott On Tue, Feb 9, 2016 at 8:38 PM, Andrew Santosa <santosa_1999 at yahoo.com> wrote: > LLBMC http://llbmc.org uses bounded model checking technique to find > errors in LLVM IR. > Model checking is essentially search, and since LLBMC is bounded, the > search for errors

hi how can i plot now this function??? have to be m= 2??? because of the dimensions?thanks for ur help myfun <- function(n, m, alpha = .05, seeder = 1000) { set.seed(seeder) x <- matrix(rnorm(n, 0, 0.5), ncol = m) y <- matrix(rnorm(n, 0, 0.8), ncol = m) l <- diag(cor(x, y)) cat("Correlations between two random variables \n", l, fill = TRUE) gute

The LLVA and LLVM papers motivate the GetElementPtr instruction by arguing that it abstracts implementation details, in particular pointer size, from the compiler. While it does this fine for pointer addresses, it does not manage it for address offsets. Consider the following code: $ cat test.c int main() { int *x[2]; int **y = &x[1]; return (y - x); } $ llvm-gcc -O3 -c test.c

hey, how can i plot this function??? thanks for ur help n=1000 m=2 k=n/m N=100 myfun <- function(n, m, alpha = .05, seeder = 1000) { l=matrix(0,nrow=m,ncol=N) for(i in 1:N){ set.seed(i) for(j in 1:m){ x=rnorm(n,0,0.5) y=rnorm(n,0,0.8) l[j,i]=cor((x[(((j-1)*k)+1):(((j-1)*k)+k)]), (y[(((j-1)*k)+1):(((j-1)*k)+k)])) } } for(i in 1:N){ for (j in 1:m){ gute <- function() { q_1 <-

I have a simple X, Y data frame that I am trying to run regression analysis on. The linear regression looks great, but when I use lm(formula = y ~ poly(x, degree = 5)) I get the same coeffecients. So for example if I use degree =3 my formula would look like y = 4.2 x^3 + 3.2x^2 + 2.1x + 1.0 and my degree 5 would look like y = 6.5x^5+ 5.4x^4 + 4.2 x^3 + 3.2x^2 + 2.1x + 1.0, which doesn't make

On Mon, 31 Jul 2006, Devang Patel wrote: > On Jul 31, 2006, at 11:14 AM, Vikram Adve wrote: >> Does llvmgcc4 convert the high-level AST to LLVM (like llvmgcc3x) or does >> it go from GIMPL to LLVM? If the latter, would it be possible to allow >> some TreeSSA optimizations before emitting LLVM? > llvmgcc4 intercepts high-level GCC trees to GIMPLE tree transformation

On Tue, Jun 22, 2010 at 1:53 PM, Chris Lattner <clattner at apple.com> wrote: > > On Jun 22, 2010, at 10:29 AM, Jianzhou Zhao wrote: > >> Hi, >> >> Does LLVM have passes that do translations between GCC RTL and LLVM >> SSA, RTL -> SSA and SSA -> RTL? > > Nope.  There has been some talk about doing a Clang -> RTL or LLVM IR -> RTL backend, to

On Jul 31, 2006, at 11:14 AM, Vikram Adve wrote: > Does llvmgcc4 convert the high-level AST to LLVM (like llvmgcc3x) > or does it go from GIMPL to LLVM? If the latter, would it be > possible to allow some TreeSSA optimizations before emitting LLVM? llvmgcc4 intercepts high-level GCC trees to GIMPLE tree transformation routines to get trees that are suitable for LLVM byte code.

Does llvmgcc4 convert the high-level AST to LLVM (like llvmgcc3x) or does it go from GIMPL to LLVM? If the latter, would it be possible to allow some TreeSSA optimizations before emitting LLVM? --Vikram http://www.cs.uiuc.edu/~vadve http://llvm.cs.uiuc.edu/ On Jul 31, 2006, at 1:10 PM, Devang Patel wrote: > llvmgcc4 emits LLVM byte code before executing GCC optimizations, > so one

On Mon, Sep 13, 2010 at 04:27, Duncan Sands <baldrick at free.fr> wrote: > Hopefully this is feasible, as I said I didn't work on > it yet. It sounds doable, but I'm not sure why would you want to convert the gimple into LLVM bitcode, if you are already saving LLVM bitcode in the file. Wouldn't you be just duplicating code? Diego.

Dear All, I am trying to understand the process followed for converting GIMPLE IR to LLVM IR in LLVM-GCC/DragonEgg - more importantly conversion of OpenMP extended GIMPLE IR to LLVM IR. It would be great if anybody points me to some documentation before I my-self delve into the understanding of related source code. -- Cheers -mahesha -------------- next part -------------- An HTML attachment

On 01/01/2013 02:45 PM, Duncan Sands wrote: > Hi Dmitry, > >> >> In our compiler we use a modified version LLVM Polly, which is very >> sensitive to >> proper code generation. Among the number of limitations, the loop region >> (enclosed by phi node on induction variable and branch) is required to >> be free >> of additional memory-dependent