similar to: Polly loop offloading to Accelerator

Hello, i have been working with an accelerator backend. the accelerator has large vector/simd units. i want streaming loops (non-temporal) vectorized present in code to be offloaded to accelerator simd units. i find polly really suitable for this. i am thinking if the generated IR is passed to polly and then it analyzes loop to know it posses no reuse, if such loop is identified accelerator

Hello, I want to study the individual O3 optimizations. For this I am using following commands, but unable to replicate O3 behavior. 1. Documents/clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/clang -O1 -Xclang -disable-llvm-passes -emit-llvm -S vecsum.c -o vecsum-noopt.ll 2. Documents/clang+llvm-9.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/clang -O3 -mllvm -debug-pass=Arguments -emit-llvm -S

On Thu, Oct 17, 2019 at 11:22 AM David Greene via llvm-dev < llvm-dev at lists.llvm.org> wrote: > hameeza ahmed via llvm-dev <llvm-dev at lists.llvm.org> writes: > > > Hello, > > I want to study the individual O3 optimizations. For this I am using > > following commands, but unable to replicate O3 behavior. > > > > 1.

Hi Teresa Thanks for your very quick and clear explanation. I have one more question. The emit-llvm option will give you the IR for a single source file when you compile it with -c. All of those files when combined give the IR in the preopt.bc temp file. =========== So if I use "clang -emit-llvm -c" to generate the .ll file. It should be the same as the one I generated by using

I run matrix multiplication code with both the approaches o3 at clang and o3 at opt. clang o3 is about 2.97x faster than opt o3. On Mon, Oct 21, 2019 at 8:24 AM Neil Nelson <nnelson at infowest.com> wrote: > is_sorted.cpp > bool is_sorted(int *a, int n) { > > for (int i = 0; i < n - 1; i++) > > if (a[i] > a[i + 1]) > return false; > return

These are the bitcode at different stages of the LTO portion of the compile. LTO merges the IR for all files being linked and optimizes them as a single monolithic module. The preopt.bc is the merged IR just after merging and before performing any LTO optimizations. internalize.bc is after performing whole program internalization. opt.bc is after the optimization pipeline, and .precodegen.bc is

Thank You.. I used following command to generate .bc or .ll /Documents/clang+llvm-4.0.0-x86_64-linux-gnu-ubuntu-16.04/bin/clang -O0 -emit-llvm -S -o vec4.ll vecsum.c /Documents/clang+llvm-7.0.0-x86_64-linux-gnu-ubuntu-16.04/bin/clang -O0 -emit-llvm -S -o vec7.ll vecsum.c On Wed, Jan 16, 2019 at 6:49 AM Sanjoy Das <sanjoy at playingwithpointers.com> wrote: > It is hard to tell

Hi everyone, I'll be very thankful if anyone can help me. I want to extract the dependences details by using polly. I followed the following steps on example code matmul.c: 1. clang -S -emit-llvm matmul.c -o matmul.s 2. opt -S -polly-canonicalize matmul.s > matmul.preopt.ll 3. opt -basicaa -polly-dependences -analyze matmul.preopt.ll But it doesn't show me the dependences. I

At 2013-08-16 12:44:02,"Tobias Grosser" <tobias at grosser.es> wrote: >Hi, > >I tried to reproduce your findings, but could not do so. Sorry, I did not put all code in my previous email because the code seems a little too long and complicated. You can refer to the detailed C code and LLVM IR code on http://llvm.org/bugs/show_bug.cgi?id=16843 There are four attachments

Mmm, this code seems to kill polly: #include <stdio.h> #include <stdlib.h> int main() { char *B; int i,j,k,h; const int x = 0, y=0; B = (char *)malloc(sizeof(char)*1024*1024); for (i = 1; i < 1024; i++) for (j = 1; j < 1024; j++) { if (i+j > 1000) B[j] = i; } printf("Random Value: %d", B[rand() % 1024*1024]); return 0; } running: opt

Hi I use the LDFLAGS=" -flto -fuse-ld=gold -Wl,-plugin-opt=save-temps " to generate the makefile and to make the whole program. However, found four different kinds of bitcode for each target. For example, I am compiling coreutils. For the program "nohup", I can get nohup.0.0.preopt.bc nohup.0.2.internalize.bc nohup.0.4.opt.bc nohup.0.5.precodegen.bc If I am right, I

On 08/16/2013 02:42 AM, Star Tan wrote: > At 2013-08-16 12:44:02,"Tobias Grosser" <tobias at grosser.es> wrote: >> Hi, >> >> I tried to reproduce your findings, but could not do so. > > > Sorry, I did not put all code in my previous email because the code seems a little too long and complicated. > You can refer to the detailed C code and LLVM IR

On 08/15/2013 03:32 AM, Star Tan wrote: > Hi all, Hi, I tried to reproduce your findings, but could not do so. > I have investigated the 6X extra compile-time overhead when Polly compiles the simple nestedloop benchmark in LLVM-testsuite. (http://188.40.87.11:8000/db_default/v4/nts/31?compare_to=28&baseline=28). Preliminary results show that such compile-time overhead is resulted by

I add also the output of these commands: [hades at artemis examples]$ ./compile_ex.sh super_simple_loop Printing analysis 'Polly - Detect Scops in functions' for function 'main': [hades at artemis examples]$ modifying it in : #include <stdio.h> int main() { int A[1024]; int j, k=10; for (j = 0; j < 1024; j++) A[j] = k;

On 10/07/2011 03:43 PM, Marcello Maggioni wrote: > 2011/10/7 Marcello Maggioni<hayarms at gmail.com>: >> Hi, >> >> for example this loop: >> >> #include<stdio.h> >> >> int main() >> { >> int A[1024]; >> int j, k=10; >> for (j = 1; j< 1024; j++) >> A[j] =

From: Jonathan Lennox <jonathan at vidyo.com> * Makes ?enable-intrinsics work with clang and other non-GCC compilers * Enables RTCD for the floating-point-mode SSE code in Celt. * Disables use of RTCD in cases where the compiler targets an instruction set by default. * Enables the SSE4.1 Silk optimizations that apply to the common parts of Silk when Opus is built in floating-point mode, not

From: Jonathan Lennox <jonathan at vidyo.com> * Makes ?enable-intrinsics work with clang and other non-GCC compilers * Enables RTCD for the floating-point-mode SSE code in Celt. * Disables use of RTCD in cases where the compiler targets an instruction set by default. * Enables the SSE4.1 Silk optimizations that apply to the common parts of Silk when Opus is built in floating-point mode, not

At 2013-09-25 18:03:18,"Tobias Grosser" <tobias at grosser.es> wrote:> >I think this is too early, as most of the canonicalization is not yet  >done. We probably don't need to investigate this bug immediately, but >it would be nice if we could make it reproducible without your changes  >to polly. For this please run the command with -debug-pass=Arguments

i put following line in CMakeLists.txt; add_subdirectory(mypass) then used make -j9 then i used following and run on canonicalize IR $ opt -load lib/LLVMmypass.so -mypass vec-sum.preopt.ll On Mon, Jan 29, 2018 at 9:39 PM, Michael Kruse <llvmdev at meinersbur.de> wrote: > 2018-01-29 10:18 GMT-06:00 hameeza ahmed <hahmed2305 at gmail.com>: > > I tried writing

Hi, I use the following commands to compile the IR. But I don't see the macro information in the .ll file. Is there a way to preserve the macro information (print() in this case) for debugging purposes? $ clang -std=gnu99 -g3 -flto -Wall -pedantic -c -o main.o main.c $ clang main.o -flto -fuse-ld=gold '-Wl,-plugin-opt=save-temps' -o main.exe $ llvm-dis main.exe.0.0.preopt.bc /* vim: