JDK-8324655 : Identify integer minimum and maximum patterns created with if statements
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 23
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2024-01-24
  • Updated: 2024-04-05
  • Resolved: 2024-03-25
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JDK 23
23 b16Fixed
Related Reports
Relates :  
JDK-8329797 - Shenandoah: Default case invoked for: "MaxL" (bad AD file)
Relates :  
JDK-8329531 - compiler/c2/irTests/TestIfMinMax.java fails with IRViolationException: There were one or multiple IR rule failures.
Relates :  
JDK-8039104 - Don't use Math.min/max intrinsic on x86
Relates :  
JDK-8329807 - Shenandoah: Temporarily revert JDK-8324655
Relates :  
JDK-8329355 - Test compiler/c2/irTests/TestIfMinMax.java fails on RISC-V
Description
The code patterns "a > b ? a : b" and "if (a > b) b = a" are fairly common in Java code. Currently, the compiler doesn't transform these patterns into minimum and maximum nodes, but such a transformation would compact the IR and allow for other optimizations, such as vectorization.
Comments
Changeset: 9f920b9b Author: Jasmine Karthikeyan <jkarthikeyan@openjdk.org> Committer: Emanuel Peter <epeter@openjdk.org> Date: 2024-03-25 06:23:11 +0000 URL: https://git.openjdk.org/jdk/commit/9f920b9bbf8a64e2c2db085cf3da30db37c0d1bc
25-03-2024
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/17574 Date: 2024-01-25 18:15:21 +0000
25-01-2024