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8073480: C2 should optimize explicit range checks

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Explicit range checks should be recognized by C2

Reviewed-by: kvn, vlivanov
This commit is contained in:
Roland Westrelin 2015-03-17 10:06:31 +01:00
parent f51a895f42
commit 71e31ee0b9
16 changed files with 1174 additions and 147 deletions
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3
hotspot/src/share/vm/runtime/deoptimization.hpp
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@ -63,6 +63,7 @@ class Deoptimization : AllStatic {
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_unstable_fused_if, // fused two ifs that had each one untaken branch. One is now taken.
// Reason_tenured is counted separately, add normal counted Reasons above.
// Related to MethodData::_trap_hist_limit where Reason_tenured isn't included
@ -326,6 +327,8 @@ class Deoptimization : AllStatic {
return Reason_null_check;
else if (reason == Reason_unstable_if)
return Reason_intrinsic;
else if (reason == Reason_unstable_fused_if)
return Reason_range_check;
else
return Reason_none;
}