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6892658: C2 should optimize some stringbuilder patterns

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Reviewed-by: kvn, twisti
This commit is contained in:
Tom Rodriguez 2009-11-12 09:24:21 -08:00
parent 63cc2211ed
commit 9db2092b1b
35 changed files with 2245 additions and 115 deletions
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8
hotspot/src/share/vm/opto/parseHelper.cpp
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@ -221,6 +221,14 @@ void Parse::do_new() {
// Push resultant oop onto stack
push(obj);
// Keep track of whether opportunities exist for StringBuilder
// optimizations.
if (OptimizeStringConcat &&
(klass == C->env()->StringBuilder_klass() ||
klass == C->env()->StringBuffer_klass())) {
C->set_has_stringbuilder(true);
}
}
#ifndef PRODUCT