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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 18
Affects Version/s: 17
Component/s: hotspot
Labels:

Subcomponent:
compiler
Resolved In Build:
b21

~~JDK-8255150~~ makes it possible for java code to explicitly perform a range check on long values. ~~JDK-8223051~~ provides a transformation of long counted loops into loop nests with an inner int counted loop. With this change I propose transforming long range checks that operate on the iv of a long counted loop into range checks that operate on the iv of the int inner loop once it has been created. Existing range check eliminations can then kick in.

relates to

JDK-8280600 C2: assert(!had_error) failed: bad dominance

Resolved

JDK-8223051 support loops with long (64b) trip counts

Resolved

JDK-8276116 C2: optimize long range checks in int counted loops

Resolved

JDK-8278790 Inner loop of long loop nest runs for too few iterations

Resolved

JDK-8314580 PhaseIdealLoop::transform_long_range_checks fails with assert "was tested before"

Resolved

JDK-8329163 C2: possible overflow in PhaseIdealLoop::extract_long_range_checks()

Resolved

JDK-8278296 Generalize long range check transformation

Resolved

links to

Commit openjdk/jdk/82f4aacb

Review openjdk/jdk/2045

(2 relates to, 2 links to)

Assignee:: Roland Westrelin

Reporter:: Roland Westrelin

Votes:: 0 Vote for this issue

Watchers:: 7 Start watching this issue

Created:: 2021-01-12 01:00

Updated:: 2024-03-27 08:48

Resolved:: 2021-10-26 08:54

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