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| author | Julian Brown <julian@codesourcery.com> | 2022-10-12 20:44:57 +0000 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2022-10-28 10:17:34 +0200 |
| commit | 11e811d8e2f63667f60f73731bb934273f5882b8 (patch) | |
| tree | 008e6f5e9504992b24cb6d8a433645bb5647a1a4 /libphobos/src/std/algorithm | |
| parent | 0607307768b66a90e27c5bc91a247acc938f070e (diff) | |
| download | gcc-11e811d8e2f63667f60f73731bb934273f5882b8.zip gcc-11e811d8e2f63667f60f73731bb934273f5882b8.tar.gz gcc-11e811d8e2f63667f60f73731bb934273f5882b8.tar.bz2 | |
OpenACC: Don't gang-privatize artificial variables [PR90115]
This patch prevents compiler-generated artificial variables from being
treated as privatization candidates for OpenACC.
The rationale is that e.g. "gang-private" variables actually must be
shared by each worker and vector spawned within a particular gang, but
that sharing is not necessary for any compiler-generated variable (at
least at present, but no such need is anticipated either). Variables on
the stack (and machine registers) are already private per-"thread"
(gang, worker and/or vector), and that's fine for artificial variables.
We're restricting this to blocks, as we still need to understand what it
means for a 'DECL_ARTIFICIAL' to appear in a 'private' clause.
Several tests need their scan output patterns adjusted to compensate.
2022-10-14 Julian Brown <julian@codesourcery.com>
PR middle-end/90115
gcc/
* omp-low.cc (oacc_privatization_candidate_p): Artificial vars are not
privatization candidates.
libgomp/
* testsuite/libgomp.oacc-fortran/declare-1.f90: Adjust scan output.
* testsuite/libgomp.oacc-fortran/host_data-5.F90: Likewise.
* testsuite/libgomp.oacc-fortran/if-1.f90: Likewise.
* testsuite/libgomp.oacc-fortran/print-1.f90: Likewise.
* testsuite/libgomp.oacc-fortran/privatized-ref-2.f90: Likewise.
Co-authored-by: Thomas Schwinge <thomas@codesourcery.com>
Diffstat (limited to 'libphobos/src/std/algorithm')
0 files changed, 0 insertions, 0 deletions