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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 11
Affects Version/s: 11
Component/s: hotspot
Labels:
- c2
- c2-loopopts

Subcomponent:
compiler
Resolved In Build:
b19

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8205888	11.0.1	Roland Westrelin	P3	Resolved	Fixed	team

Loop predication is only applied to predicates in the loop body that are always executed. Predicates are sometimes in a path in the loop body that's frequently but not always executed. In this case, applying loop predication would be beneficial.

backported by

JDK-8205888 C2: consider all paths in loop body for loop predication

Resolved

relates to

JDK-8235584 UseProfiledLoopPredicate fails with assert(_phase->get_loop(c) == loop) failed: have to be in the same loop

Resolved

JDK-8205407 [windows, vs<2017] C4800 after 8203197

Resolved

JDK-8231246 C2 computes wrong trip count for loops

Closed

JDK-8205574 Loop predication "assert(f <= 1 && f >= 0) failed Incorrect frequency"

Resolved

JDK-8328822 C2: "negative trip count?" assert failure in profile predicate code

Resolved

JDK-8240220 IdealLoopTree::dump_head predicate printing is broken

Resolved

JDK-8331088 Incorrect TraceLoopPredicate output

Resolved

JDK-8205515 assert(opcode == Op_RangeCheck) failed: no other if variant here

Closed

JDK-8240223 Use consistent predicate order in and with PhaseIdealLoop::find_predicate

Resolved

(5 relates to)

Assignee:: Roland Westrelin
Reporter:: Roland Westrelin
Votes:: 0 Vote for this issue
Watchers:: 3 Start watching this issue

Created:: 2018-05-15 00:27
Updated:: 2024-04-24 23:07
Resolved:: 2018-06-19 00:33

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