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https://github.com/openjdk/jdk/blame/master/test/hotspot/jtreg/compiler/loopopts/superword/SumRed_Double.java
https://github.com/openjdk/jdk/blame/master/test/hotspot/jtreg/compiler/loopopts/superword/SumRedSqrt_Double.java

These are two of the slowest compiler tests in tier1, take about 30 and 25sec.

Restrict compilation, see if compile threashold is ok. Consider merging the two tests.

Similar issue in ~~JDK-8302093~~. We should just speed up all of the reduction tests of superword.
Currently, [~dskantz] is working on ~~JDK-8294715~~. Afterwards we can speed these tests up. Maybe we have to unify all into a single test-file.

blocks

JDK-8302652 [SuperWord] Reduction should happen after loop, when possible

clones

JDK-8302093 Speed up compiler/loopopts/superword/Vec_MulAddS2I.java

duplicates

JDK-8302093 Speed up compiler/loopopts/superword/Vec_MulAddS2I.java

is cloned by

JDK-8294715 Add IR checks to the reduction vectorization tests

relates to

JDK-8295561 Review running times of hotspot compiler tier1 tests

JDK-8300865 C2: product reduction in ProdRed_Double is not vectorized

JDK-8302662 [SuperWord] Vectorize loop when value from last iteration is used after loop

JDK-8302673 [SuperWord] MaxReduction and MinReduction should vectorize for int

JDK-8302665 [SuperWord] Allow MulReductionVL not just for avx512dq

JDK-8302668 [TESTBUG] Tests require feature sse4_1 which does not exist, should be sse4.1

(5 relates to)