GPU code generation error

[Rohan Rayan]

Hello All

I am trying to get the code generation working for the GPU using poly-ACC.

I have successfully installed polly and clang and my machine also has CUDA. Unfortunately, while trying to compile, I get the following error:

Compile Command: ./llvm-project/build/bin/clang -O3 -mllvm -polly -mllvm -polly-target=gpu test.c

Error: fatal error: error in backend: Option -polly-target=gpu not supported for NPM

Does anyone know how to fix this? 

Thanks in advance

Rohan Rayan

[Michael Kruse]

Use the legacy pass manager with the -fno-legacy-pass-manager flag.

Michael

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[Rohan Rayan]

Hello Michael 

Thanks for the reply but unfortunately I still get the same error. I tried to use both -fno-legacy-pass-manager and -legacy-pass-manager but both fail.

Command: ../llvm-project/build/bin/clang -O3 -fno-legacy-pass-manager -mllvm -polly -mllvm -polly-target=gpu test.c

Error: fatal error: error in backend: Option -polly-target=gpu not supported for NPM

The version of clang that I am currently using is:

clang version 15.0.0 (https://github.com/llvm/llvm-project.git 6cfcfbdc957fcd919cf27d5afe688dc12da43bd5)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: ../llvm-project/build/bin

Should I revert to a previous commit and compile clang and polly again so that I don't face these issues?

Thanks once again.

[Michael Kruse]

I am afraid support for the legacy pass manager has been removed in
Clang (https://reviews.llvm.org/D123609). You could still emit the
LLVM-IR and pass it to `opt -enable-new-pm=0`.

Michael

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