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8031755: Type speculation should be used to optimize explicit null checks

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Feed profiling data about reference nullness to type speculation.

Reviewed-by: kvn, iveresov
This commit is contained in:
Roland Westrelin 2014-03-31 09:08:53 +02:00
parent f5d6f0ceb8
commit fa3b0a8f47
16 changed files with 683 additions and 418 deletions
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2
hotspot/src/share/vm/oops/methodData.hpp
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@ -2052,7 +2052,7 @@ public:
// Whole-method sticky bits and flags
enum {
_trap_hist_limit = 19, // decoupled from Deoptimization::Reason_LIMIT
_trap_hist_limit = 20, // decoupled from Deoptimization::Reason_LIMIT
_trap_hist_mask = max_jubyte,
_extra_data_count = 4 // extra DataLayout headers, for trap history
}; // Public flag values