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6934604: enable parts of EliminateAutoBox by default

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Resurrected autobox elimination code and enabled part of it by default.

Reviewed-by: roland, twisti
This commit is contained in:
Vladimir Kozlov 2013-05-08 15:08:01 -07:00
parent 7c367a6025
commit b4977e887a
48 changed files with 5776 additions and 501 deletions
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9
hotspot/src/share/vm/opto/c2compiler.cpp
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@ -125,9 +125,10 @@ void C2Compiler::compile_method(ciEnv* env,
bool subsume_loads = SubsumeLoads;
bool do_escape_analysis = DoEscapeAnalysis &&
!env->jvmti_can_access_local_variables();
bool eliminate_boxing = EliminateAutoBox;
while (!env->failing()) {
// Attempt to compile while subsuming loads into machine instructions.
Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis);
Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
// Check result and retry if appropriate.
@ -142,6 +143,12 @@ void C2Compiler::compile_method(ciEnv* env,
do_escape_analysis = false;
continue; // retry
}
if (C.has_boxed_value()) {
// Recompile without boxing elimination regardless failure reason.
assert(eliminate_boxing, "must make progress");
eliminate_boxing = false;
continue; // retry
}
// Pass any other failure reason up to the ciEnv.
// Note that serious, irreversible failures are already logged
// on the ciEnv via env->record_method_not_compilable().