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comparison src/share/vm/c1/c1_GraphBuilder.cpp @ 6795:7eca5de9e0b6

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7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement() Summary: use shorter instruction sequences for atomic add and atomic exchange when possible. Reviewed-by: kvn, jrose
author roland
date Thu, 20 Sep 2012 16:49:17 +0200
parents da91efe96a93
children c3e799c37717
comparison
equal deleted inserted replaced
6794:8ae8f9dd7099 6795:7eca5de9e0b6
3381 case vmIntrinsics::_compareAndSwapInt: 3381 case vmIntrinsics::_compareAndSwapInt:
3382 case vmIntrinsics::_compareAndSwapObject: 3382 case vmIntrinsics::_compareAndSwapObject:
3383 append_unsafe_CAS(callee); 3383 append_unsafe_CAS(callee);
3384 return true; 3384 return true;
3385 3385
3386 case vmIntrinsics::_getAndAddInt:
3387 if (!VM_Version::supports_atomic_getadd4()) {
3388 return false;
3389 }
3390 return append_unsafe_get_and_set_obj(callee, true);
3391 case vmIntrinsics::_getAndAddLong:
3392 if (!VM_Version::supports_atomic_getadd8()) {
3393 return false;
3394 }
3395 return append_unsafe_get_and_set_obj(callee, true);
3396 case vmIntrinsics::_getAndSetInt:
3397 if (!VM_Version::supports_atomic_getset4()) {
3398 return false;
3399 }
3400 return append_unsafe_get_and_set_obj(callee, false);
3401 case vmIntrinsics::_getAndSetLong:
3402 if (!VM_Version::supports_atomic_getset8()) {
3403 return false;
3404 }
3405 return append_unsafe_get_and_set_obj(callee, false);
3406 case vmIntrinsics::_getAndSetObject:
3407 #ifdef _LP64
3408 if (!UseCompressedOops && !VM_Version::supports_atomic_getset8()) {
3409 return false;
3410 }
3411 if (UseCompressedOops && !VM_Version::supports_atomic_getset4()) {
3412 return false;
3413 }
3414 #else
3415 if (!VM_Version::supports_atomic_getset4()) {
3416 return false;
3417 }
3418 #endif
3419 return append_unsafe_get_and_set_obj(callee, false);
3420
3386 case vmIntrinsics::_Reference_get: 3421 case vmIntrinsics::_Reference_get:
3387 // Use the intrinsic version of Reference.get() so that the value in 3422 // Use the intrinsic version of Reference.get() so that the value in
3388 // the referent field can be registered by the G1 pre-barrier code. 3423 // the referent field can be registered by the G1 pre-barrier code.
3389 // Also to prevent commoning reads from this field across safepoint 3424 // Also to prevent commoning reads from this field across safepoint
3390 // since GC can change its value. 3425 // since GC can change its value.
4104 if (success && CIPrintMethodCodes) { 4139 if (success && CIPrintMethodCodes) {
4105 callee->print_codes(); 4140 callee->print_codes();
4106 } 4141 }
4107 } 4142 }
4108 4143
4144 bool GraphBuilder::append_unsafe_get_and_set_obj(ciMethod* callee, bool is_add) {
4145 if (InlineUnsafeOps) {
4146 Values* args = state()->pop_arguments(callee->arg_size());
4147 BasicType t = callee->return_type()->basic_type();
4148 null_check(args->at(0));
4149 Instruction* offset = args->at(2);
4150 #ifndef _LP64
4151 offset = append(new Convert(Bytecodes::_l2i, offset, as_ValueType(T_INT)));
4152 #endif
4153 Instruction* op = append(new UnsafeGetAndSetObject(t, args->at(1), offset, args->at(3), is_add));
4154 compilation()->set_has_unsafe_access(true);
4155 kill_all();
4156 push(op->type(), op);
4157 }
4158 return InlineUnsafeOps;
4159 }
4109 4160
4110 #ifndef PRODUCT 4161 #ifndef PRODUCT
4111 void GraphBuilder::print_stats() { 4162 void GraphBuilder::print_stats() {
4112 vmap()->print(); 4163 vmap()->print();
4113 } 4164 }