RFR+RFA [11u]: 8214189: test/hotspot/jtreg/compiler/intrinsics/mathexact/MulExactLConstantTest.java fails on Windows x64 when run with -XX:-TieredCompilation

[Langer, Christoph]

Hi,

we have observed a regression in JCK testing of jkd11u since 19/02/07. Running JCK lang tests with -Xcomp -Xbatch -XX:-TieredCompilation show failures on Windows x64 in:
lang/EXPR/expr260/expr26001/expr26001_rt
vm/instr/lmul/lmul002/lmul00201m1/lmul00201m1
vm/instr/lmul/lmul002/lmul00201m1t/lmul00201m1t

I think the regression was introduced when https://bugs.openjdk.java.net/browse/JDK-8213419 and https://bugs.openjdk.java.net/browse/JDK-8214206 were brought to jdk11u at about that time. The issue is fixed with 8214189. I consider this severe enough to warrant a backport of the fix to 11.0.3.

Bug: https://bugs.openjdk.java.net/browse/JDK-8214189
Original Change: http://hg.openjdk.java.net/jdk/jdk/rev/0037ea3c7322
Backport Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8214189.jdk11u/

The patch applies cleanly, apart from the change to the exclusion list test/hotspot/jtreg/ProblemList.txt which is not valid in 11u. It did also not show further regressions in the nightly tests.

I guess it should also be brought to 8u as well, since the regressing patches have been checked in there as well.

Best regards
Christoph