JDK-8155612 : Aarch64: vector nodes need to support misaligned offset
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 9
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- CPU: aarch64
- Submitted: 2016-04-28
- Updated: 2021-02-01
- Resolved: 2016-04-28
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| JDK 9 | Other |
|---|---|
9 b120Fixed  |
openjdk8u292Fixed |
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Description
When the superword optimization encounters a misaligned offset, it tries to align the loop induction variable so the memory access is aligned. So even though the aarch64 port only supports align vector memory accesses ( Matcher::misaligned_vectors_ok() return false), vector node can still get a misaligned offset which results in: # Internal Error (/scratch/rwestrel/hs-comp/hotspot/src/cpu/aarch64/vm/assembler_aarch64.hpp:251), pid=3780, tid=3807 # guarantee(chk == -1 || chk == 0) failed: Field too big for insn