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8030976: Untaken paths should be more vigorously pruned at highest optimization level

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Reviewed-by: roland, vlivanov
This commit is contained in:
Rickard Bäckman 2014-05-22 13:42:44 +02:00
parent 0915147727
commit 8bd4b5624c
5 changed files with 14 additions and 71 deletions
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6
hotspot/src/share/vm/runtime/deoptimization.hpp
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@ -62,6 +62,10 @@ class Deoptimization : AllStatic {
Reason_speculate_class_check, // saw unexpected object class from type speculation
Reason_speculate_null_check, // saw unexpected null from type speculation
Reason_rtm_state_change, // rtm state change detected
Reason_unstable_if, // a branch predicted always false was taken
// Reason_tenured is counted separately, add normal counted Reasons above.
// Related to MethodData::_trap_hist_limit where Reason_tenured isn't included
Reason_tenured, // age of the code has reached the limit
Reason_LIMIT,
// Note: Keep this enum in sync. with _trap_reason_name.
@ -319,6 +323,8 @@ class Deoptimization : AllStatic {
return Reason_class_check;
else if (reason == Reason_speculate_null_check)
return Reason_null_check;
else if (reason == Reason_unstable_if)
return Reason_intrinsic;
else
return Reason_none;
}