JDK-8122947 : Cleanup related to flag UseSSE42Intrinsics needed
- Type: Enhancement
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 9,10
- Priority: P4
- Status: Closed
- Resolution: Duplicate
- Submitted: 2015-06-17
- Updated: 2017-01-25
- Resolved: 2017-01-25
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| JDK 9 |
|---|
9Resolved  |
Related Reports
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Duplicate :
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Description
This flag is x86 specific.
Currently other platforms - aarch64, ppc have String intrinsics implemented.
So fragment of shared code in library_call.cpp
if (Matcher::has_match_rule(Op_StrIndexOf) &&
UseSSE42Intrinsics) {
...
forces non x86 platforms set UseSSE42Intrinsics in order to use String intrinsics.
Instead it should be
if (Matcher::has_match_rule(Op_StrIndexOf) {
...
and platform dependent methods Matcher::has_match_rule() should check UseSSE42Intrinsics flag for x86.
Other platforms should make their own decision not depending on this flag
Comments
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