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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/32918/
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Review request for hive.
Bugs: Hive-10180
https://issues.apache.org/jira/browse/Hive-10180
Repository: hive
Description
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JVM is quite strict on the code schema which may executed with SIMD
instructions, take a loop in DoubleColAddDoubleColumn.java for example,
for (int i = 0; i != n; i++) {
outputVector[i] = vector1[0] + vector2[i];
}
The "vector1[0]" reference would prevent JVM to execute this part of code with
vectorized instructions, we need to assign the "vector1[0]" to a variable
outside of loop, and use that variable in loop.
Diffs
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trunk/ql/src/gen/vectorization/ExpressionTemplates/ColumnArithmeticColumn.txt
1671736
Diff: https://reviews.apache.org/r/32918/diff/
Testing
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Thanks,
chengxiang li
