| commit | f20b67a81c66f44ab2f57b5a2fce04dafe758a86 | [log] [tgz] |
|---|---|---|
| author | Sergio Afonso <[email protected]> | Thu Jul 20 12:03:36 2023 |
| committer | Sergio Afonso <[email protected]> | Thu Aug 10 10:29:45 2023 |
| tree | 6bd1f43ce4c529a2b51fa8c0db9e21b59810ceb8 | |
| parent | 68744ffbdd7daac41da274eef9ac0d191e11c16d [diff] |
[Flang][MLIR][OpenMP] Improve device-only function filtering This patch improves the implementation of a recent function filtering workaround to address problems uncovered by D154247. In particular, the problem was related to the removal of functions called from within target regions. Since target regions have to remain until LLVM IR is generated, removing these functions from MLIR results in undefined references any time there are calls to them in a target region. This patch modifies the MLIR function filtering pass to make these functions "external" rather than removing them. This way, the processing and lowering of MLIR functions that will eventually be discarded is still prevented, but no calls to undefined functions remain either. Additionally, the approach of just filtering host-only functions during device compilation, and not filtering device-only functions during host compilation, is maintained. This is because code generation for device-only functions is required for host fallback to work. Depends on D156988 Differential Revision: https://reviews.llvm.org/D155827
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