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Some Reduction Tests fail on Intel 18 with aggressive vectorization on #774

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crtrott opened this issue May 4, 2017 · 2 comments
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Some Reduction Tests fail on Intel 18 with aggressive vectorization on #774

crtrott opened this issue May 4, 2017 · 2 comments
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Bug Broken / incorrect code; it could be Kokkos' responsibility, or others’ (e.g., Trilinos)

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crtrott commented May 4, 2017

Apparently the compiler ignores the dependency of the reduction variable between iterations ...
@crtrott crtrott added the Bug Broken / incorrect code; it could be Kokkos' responsibility, or others’ (e.g., Trilinos) label May 4, 2017
@crtrott crtrott closed this as completed in 7393ab2 May 4, 2017
crtrott added a commit that referenced this issue May 4, 2017
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Fix reductions with aggressive_vectorization #774
6e9c80c
@crtrott crtrott reopened this May 4, 2017
@crtrott crtrott self-assigned this May 4, 2017
@hcedwar
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hcedwar commented May 4, 2017

File a bug report with Intel?

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crtrott commented May 4, 2017 •
edited

Maybe, the semantics are bit murky of ivdep, there is no standardized behaviour ...

In particular: should the compiler ignore proven dependencies ?

crtrott added a commit to crtrott/kokkos that referenced this issue May 18, 2017
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Another part of the fix for kokkos#774
2ac1910
@crtrott crtrott closed this as completed May 27, 2017
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