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Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 26
Affects Version/s: 25, 26
Component/s: hotspot
Labels:

Subcomponent:
compiler
Resolved In Build:
b20

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8377767	25.0.3	Aleksey Shipilev	P3	Resolved	Fixed	master

In production, this behaves safe, but in debug, we find a missing case.

Very easy to reproduce:

java Test.java

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Test.java
0.3 kB
2025-10-15 01:35

backported by

JDK-8377767 C2: Unexpected node in SuperWord truncation: ReverseBytesS, ReverseBytesUS

Resolved

caused by

JDK-8350177 C2 SuperWord: Integer.numberOfLeadingZeros, numberOfTrailingZeros, reverse and bitCount have input types wrongly truncated for byte and short

Resolved

links to

Commit(master) openjdk/jdk25u-dev/fbd9532c

Commit(master) openjdk/jdk/aa194c6a

Review(master) openjdk/jdk25u-dev/233

Review(master) openjdk/jdk/27819

(1 links to)

Assignee:: Emanuel Peter
Reporter:: Emanuel Peter
Votes:: 0 Vote for this issue
Watchers:: 5 Start watching this issue

Created:: 2025-10-15 01:35
Updated:: Yesterday 02:44
Resolved:: 2025-10-15 23:48

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