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8024070: C2 needs some form of type speculation

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Record unused type profile information with type system, propagate and use it.

Reviewed-by: kvn, twisti
This commit is contained in:
Roland Westrelin 2013-10-23 12:40:23 +02:00
parent ceb177b16f
commit 1b5bd82335
22 changed files with 1429 additions and 144 deletions
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8
hotspot/src/share/vm/runtime/arguments.cpp
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@ -3721,6 +3721,14 @@ jint Arguments::apply_ergo() {
// 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);
}
if (UseTypeSpeculation && FLAG_IS_DEFAULT(ReplaceInParentMaps)) {
// Doing the replace in parent maps helps speculation
FLAG_SET_DEFAULT(ReplaceInParentMaps, true);
}
#endif
if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {