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8137167: JEP165: Compiler Control: Implementation task

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Compiler Control JEP

Reviewed-by: roland, twisti, zmajo, simonis
This commit is contained in:
Nils Eliasson 2015-10-20 18:07:28 +02:00
parent 857b7eb968
commit 5a5faf94bf
66 changed files with 3965 additions and 307 deletions
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28
hotspot/src/share/vm/classfile/vmSymbols.cpp
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@ -417,36 +417,10 @@ int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
}
}
bool vmIntrinsics::is_disabled_by_flags(methodHandle method, methodHandle compilation_context) {
bool vmIntrinsics::is_disabled_by_flags(methodHandle method) {
vmIntrinsics::ID id = method->intrinsic_id();
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
// Check if the intrinsic corresponding to 'method' has been disabled on
// the command line by using the DisableIntrinsic flag (either globally
// or on a per-method level, see src/share/vm/compiler/abstractCompiler.hpp
// for details).
// Usually, the compilation context is the caller of the method 'method'.
// The only case when for a non-recursive method 'method' the compilation context
// is not the caller of the 'method' (but it is the method itself) is
// java.lang.ref.Referene::get.
// For java.lang.ref.Reference::get, the intrinsic version is used
// instead of the compiled version so that the value in the referent
// field can be registered by the G1 pre-barrier code. The intrinsified
// version of Reference::get also adds a memory barrier to prevent
// commoning reads from the referent field across safepoint since GC
// can change the referent field's value. See Compile::Compile()
// in src/share/vm/opto/compile.cpp or
// GraphBuilder::GraphBuilder() in src/share/vm/c1/c1_GraphBuilder.cpp
// for more details.
ccstr disable_intr = NULL;
if ((DisableIntrinsic[0] != '\0' && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) ||
(!compilation_context.is_null() &&
CompilerOracle::has_option_value(compilation_context, "DisableIntrinsic", disable_intr) &&
strstr(disable_intr, vmIntrinsics::name_at(id)) != NULL)
) {
return true;
}
// -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
// the following switch statement.
if (!InlineNatives) {