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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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4
hotspot/src/share/vm/runtime/arguments.cpp
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@ -3801,10 +3801,6 @@ jint Arguments::apply_ergo() {
AlwaysIncrementalInline = false;
}
#endif
if (IncrementalInline && FLAG_IS_DEFAULT(MaxNodeLimit)) {
// incremental inlining: bump MaxNodeLimit
FLAG_SET_DEFAULT(MaxNodeLimit, (intx)75000);
}
if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
// nothing to use the profiling, turn if off
FLAG_SET_DEFAULT(TypeProfileLevel, 0);