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8130832: Extend the WhiteBox API to provide information about the availability of compiler intrinsics

Browse source 
Add a new method, sun.hotspot.WhiteBox.isIntrinsicAvailable, that can be used to determine if an intrinsic is available.

Reviewed-by: kvn, jrose
This commit is contained in:
Zoltan Majo 2015-07-28 19:20:42 +02:00
parent f3d31d3866
commit 422cd18f23
14 changed files with 1347 additions and 607 deletions
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162
hotspot/src/share/vm/c1/c1_Compiler.cpp
View file

@ -99,6 +99,164 @@ BufferBlob* Compiler::init_buffer_blob() {
return buffer_blob;
}
bool Compiler::is_intrinsic_supported(methodHandle method) {
vmIntrinsics::ID id = method->intrinsic_id();
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
if (method->is_synchronized()) {
// C1 does not support intrinsification of synchronized methods.
return false;
}
switch (id) {
case vmIntrinsics::_compareAndSwapLong:
if (!VM_Version::supports_cx8()) return false;
break;
case vmIntrinsics::_getAndAddInt:
if (!VM_Version::supports_atomic_getadd4()) return false;
break;
case vmIntrinsics::_getAndAddLong:
if (!VM_Version::supports_atomic_getadd8()) return false;
break;
case vmIntrinsics::_getAndSetInt:
if (!VM_Version::supports_atomic_getset4()) return false;
break;
case vmIntrinsics::_getAndSetLong:
if (!VM_Version::supports_atomic_getset8()) return false;
break;
case vmIntrinsics::_getAndSetObject:
#ifdef _LP64
if (!UseCompressedOops && !VM_Version::supports_atomic_getset8()) return false;
if (UseCompressedOops && !VM_Version::supports_atomic_getset4()) return false;
#else
if (!VM_Version::supports_atomic_getset4()) return false;
#endif
break;
case vmIntrinsics::_arraycopy:
case vmIntrinsics::_currentTimeMillis:
case vmIntrinsics::_nanoTime:
case vmIntrinsics::_Reference_get:
// Use the intrinsic version of Reference.get() so that the value in
// the referent field can be registered by the G1 pre-barrier code.
// Also to prevent commoning reads from this field across safepoint
// since GC can change its value.
case vmIntrinsics::_loadFence:
case vmIntrinsics::_storeFence:
case vmIntrinsics::_fullFence:
case vmIntrinsics::_floatToRawIntBits:
case vmIntrinsics::_intBitsToFloat:
case vmIntrinsics::_doubleToRawLongBits:
case vmIntrinsics::_longBitsToDouble:
case vmIntrinsics::_getClass:
case vmIntrinsics::_isInstance:
case vmIntrinsics::_currentThread:
case vmIntrinsics::_dabs:
case vmIntrinsics::_dsqrt:
case vmIntrinsics::_dsin:
case vmIntrinsics::_dcos:
case vmIntrinsics::_dtan:
case vmIntrinsics::_dlog:
case vmIntrinsics::_dlog10:
case vmIntrinsics::_dexp:
case vmIntrinsics::_dpow:
case vmIntrinsics::_getObject:
case vmIntrinsics::_getBoolean:
case vmIntrinsics::_getByte:
case vmIntrinsics::_getShort:
case vmIntrinsics::_getChar:
case vmIntrinsics::_getInt:
case vmIntrinsics::_getLong:
case vmIntrinsics::_getFloat:
case vmIntrinsics::_getDouble:
case vmIntrinsics::_putObject:
case vmIntrinsics::_putBoolean:
case vmIntrinsics::_putByte:
case vmIntrinsics::_putShort:
case vmIntrinsics::_putChar:
case vmIntrinsics::_putInt:
case vmIntrinsics::_putLong:
case vmIntrinsics::_putFloat:
case vmIntrinsics::_putDouble:
case vmIntrinsics::_getObjectVolatile:
case vmIntrinsics::_getBooleanVolatile:
case vmIntrinsics::_getByteVolatile:
case vmIntrinsics::_getShortVolatile:
case vmIntrinsics::_getCharVolatile:
case vmIntrinsics::_getIntVolatile:
case vmIntrinsics::_getLongVolatile:
case vmIntrinsics::_getFloatVolatile:
case vmIntrinsics::_getDoubleVolatile:
case vmIntrinsics::_putObjectVolatile:
case vmIntrinsics::_putBooleanVolatile:
case vmIntrinsics::_putByteVolatile:
case vmIntrinsics::_putShortVolatile:
case vmIntrinsics::_putCharVolatile:
case vmIntrinsics::_putIntVolatile:
case vmIntrinsics::_putLongVolatile:
case vmIntrinsics::_putFloatVolatile:
case vmIntrinsics::_putDoubleVolatile:
case vmIntrinsics::_getByte_raw:
case vmIntrinsics::_getShort_raw:
case vmIntrinsics::_getChar_raw:
case vmIntrinsics::_getInt_raw:
case vmIntrinsics::_getLong_raw:
case vmIntrinsics::_getFloat_raw:
case vmIntrinsics::_getDouble_raw:
case vmIntrinsics::_putByte_raw:
case vmIntrinsics::_putShort_raw:
case vmIntrinsics::_putChar_raw:
case vmIntrinsics::_putInt_raw:
case vmIntrinsics::_putLong_raw:
case vmIntrinsics::_putFloat_raw:
case vmIntrinsics::_putDouble_raw:
case vmIntrinsics::_putOrderedObject:
case vmIntrinsics::_putOrderedInt:
case vmIntrinsics::_putOrderedLong:
case vmIntrinsics::_getShortUnaligned:
case vmIntrinsics::_getCharUnaligned:
case vmIntrinsics::_getIntUnaligned:
case vmIntrinsics::_getLongUnaligned:
case vmIntrinsics::_putShortUnaligned:
case vmIntrinsics::_putCharUnaligned:
case vmIntrinsics::_putIntUnaligned:
case vmIntrinsics::_putLongUnaligned:
case vmIntrinsics::_checkIndex:
case vmIntrinsics::_updateCRC32:
case vmIntrinsics::_updateBytesCRC32:
case vmIntrinsics::_updateByteBufferCRC32:
case vmIntrinsics::_compareAndSwapInt:
case vmIntrinsics::_compareAndSwapObject:
#ifdef TRACE_HAVE_INTRINSICS
case vmIntrinsics::_classID:
case vmIntrinsics::_threadID:
case vmIntrinsics::_counterTime:
#endif
break;
default:
return false; // Intrinsics not on the previous list are not available.
}
return true;
}
bool Compiler::is_intrinsic_disabled_by_flag(methodHandle method) {
vmIntrinsics::ID id = method->intrinsic_id();
assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
if (vmIntrinsics::is_disabled_by_flags(id)) {
return true;
}
if (!InlineNatives && id != vmIntrinsics::_Reference_get) {
return true;
}
if (!InlineClassNatives && id == vmIntrinsics::_getClass) {
return true;
}
return false;
}
void Compiler::compile_method(ciEnv* env, ciMethod* method, int entry_bci) {
BufferBlob* buffer_blob = CompilerThread::current()->get_buffer_blob();
@ -117,3 +275,7 @@ void Compiler::compile_method(ciEnv* env, ciMethod* method, int entry_bci) {
void Compiler::print_timers() {
Compilation::print_timers();
}
bool Compiler::is_intrinsic_available(methodHandle method, methodHandle compilation_context) {
return is_intrinsic_supported(method) && !is_intrinsic_disabled_by_flag(method);
}