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6614597: Performance variability in jvm2008 xml.validation

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Fix incorrect marking of methods as not compilable.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2010-02-01 16:49:49 -08:00
parent 4e8608a124
commit 0c27c5537e
18 changed files with 213 additions and 133 deletions
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29
hotspot/src/share/vm/ci/ciMethod.cpp
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@ -436,15 +436,20 @@ ciCallProfile ciMethod::call_profile_at_bci(int bci) {
// we will set result._method also.
}
// Determine call site's morphism.
// The call site count could be == (receivers_count_total + 1)
// not only in the case of a polymorphic call but also in the case
// when a method data snapshot is taken after the site count was updated
// but before receivers counters were updated.
if (morphism == result._limit) {
// There were no array klasses and morphism <= MorphismLimit.
if (morphism < ciCallProfile::MorphismLimit ||
morphism == ciCallProfile::MorphismLimit &&
(receivers_count_total+1) >= count) {
// The call site count is 0 with known morphism (onlt 1 or 2 receivers)
// or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
// The call site count is > 0 in the case of a polymorphic virtual call.
if (morphism > 0 && morphism == result._limit) {
// The morphism <= MorphismLimit.
if ((morphism < ciCallProfile::MorphismLimit) ||
(morphism == ciCallProfile::MorphismLimit && count == 0)) {
#ifdef ASSERT
if (count > 0) {
tty->print_cr("bci: %d", bci);
this->print_codes();
assert(false, "this call site should not be polymorphic");
}
#endif
result._morphism = morphism;
}
}
@ -452,10 +457,8 @@ ciCallProfile ciMethod::call_profile_at_bci(int bci) {
// zero or less, presume that this is a typecheck profile and
// do nothing. Otherwise, increase count to be the sum of all
// receiver's counts.
if (count > 0) {
if (count < receivers_count_total) {
count = receivers_count_total;
}
if (count >= 0) {
count += receivers_count_total;
}
}
result._count = count;