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Actually what I meant in my original loop, that there is a dependency between every two consecutive iterations. So, how the loop vectorizer says 'we can vectorize this loop'? for(int k=20;k<50;k++) dataY[k] = dataY[k-1]; From: Henrique Santos [mailto:henrique.nazare.santos at gmail.com] Sent: Sunday, November 03, 2013 4:28 PM To: Sara Elshobaky Cc: <llvmdev at

Hi Sarah, the loop vectorizer runs not on the C code but on LLVM IR this c code was lowered to. Before the loop vectorizer runs many other optimization change the shape of this IR. You can see in the LLVM IR you referenced below, a preceding LLVM IR transformation has change your loop from: > for(int k=20;k<50;k++) > dataY[k] = dataY[k-1]; to > int a = d[19]; >

Hello, I was trying to trace the Loop vectorizer of the LLVM, I wrote a simple loop with a clear dependency. But found that the debug shows that 'we can vectorize this loop' Here you are my loop with dependency: for(int k=20;k<50;k++) dataY[k] = dataY[k-1]; And the debug prints: LV: Checking a loop in "main" LV: Found a loop: for.body4 LV: Found an

Notice that the code you provided, for globals and stack allocations, at least, is semantically equivalent to: int a = d[19]; for(int k = 20; k < 50; k++) dataY[k] = a; Like so, the load you see missing was redundant, probably hoisted by GVN/PRE and replaced with "%.pre". H. On Sun, Nov 3, 2013 at 11:26 AM, Sara Elshobaky <sara.elshobaky at gmail.com>wrote: >

So, what is the use of the profile passes in LLVM? Also, does llvm detect hot blocks of code for recompilation? On Mon, Oct 7, 2013 at 4:44 PM, Amara Emerson <amara.emerson at arm.com> wrote: > No, the JIT does not do any profile guided optimizations for any > architecture. It just uses the static compilation components before loading > the object into memory and running its own

Hello, I'm using MCJIT to run some loops on my ARM processor. I was trying to perform some runtime optimizations on some function, and this requires recompiling the function at runtime. I know that this feature is not available yet in MCJIT , and to modify a function I have to create a new module with the newly optimized code. My questions are: - The newly created module can be

Hello, Please, I need more information on the runtime optimizer used in the LLVM JIT. - Where can I find it in the LLVM source code? - Are those runtime optimizations done on the LLVM representation code or on the machine code? Sara -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello, I'm executing my byte code program by the lli tool using mcjit. I need a way to find statistics about the number of instructions executed for my program. The -stats option does not include this value, are there any other way to know? I need this information to compare different versions of my bytecode program. Please advice Thanks in advance Sara Elsohbaky --------------

Hello, Can LLVM execute OpenGL ES 2.0 programs safely? As I tried a simple code, and I get some crashes while using lli example LLVM ERROR: Program used external function '__dso_handle' which could not be resolved! Thanks in advance Sara Une messagerie gratuite, garantie à vie et des services en plus, ça vous tente ? Je crée ma boîte mail www.laposte.net -------------- next part

hello, I have a question about the llvm jit. Does it use the profile information generated during runtime to enhance the generated code for arm processor? according to 'LLVM: A Compilation Framework for Lifelong Program Analysis **<http://llvm.org/pubs/2004-01-30-CGO-LLVM.html>' it is available but can't find it in the current source code. I really appreciate any help. Thanks in

Hello, I have the following simple C code below. It should return '8' as a result. But the returned result is false as it returns '1'. When I remove the line of '__attribute__((noinline))' , the returned results are correct '8'. Any idea? Please advice as I need to get the assembly code of the 'getTexSize' function alone. Note: I compile using the

Dear Duncan, thank you very much. I have been able to use it now, via the following command line: clang -emit-llvm -c -fstack-protector canary.c -o canary.bc llc -print-before=stack-protector -print-after=stack-protector -o canary.s < canary.bc Thank you again, Izabela Maffra. On 26 January 2013 15:55, <llvmdev-request at cs.uiuc.edu> wrote: > Send LLVMdev mailing

Hello, I'm sorry if this is not the place to ask my question. I know that LLVM could run an Open GL program But , does it also work with OpenGL ES 2.0? Thanks in advance Sara -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130125/9d07a5e0/attachment.html>

 Hello, I wrote a very simple openGL application, as below #include #include int main(int argc, char **argv) {   glutInit(&argc, argv);   glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);   glutCreateWindow("red 3D lighted cube");   printf("GL_VERSION = %s\n",glGetString(GL_VERSION) );   return 0; } Compiling it with Clang and adding -lglut option worked