1.1 --- a/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Tue Dec 07 11:00:02 2010 -0800
1.2 +++ b/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Wed Dec 08 02:36:36 2010 -0800
1.3 @@ -1993,15 +1993,14 @@
1.4 if ( op->code() == lir_cas_obj) {
1.5 #ifdef _LP64
1.6 if (UseCompressedOops) {
1.7 - __ mov(rscratch1, cmpval);
1.8 __ encode_heap_oop(cmpval);
1.9 - __ mov(rscratch2, newval);
1.10 - __ encode_heap_oop(rscratch2);
1.11 + __ mov(rscratch1, newval);
1.12 + __ encode_heap_oop(rscratch1);
1.13 if (os::is_MP()) {
1.14 __ lock();
1.15 }
1.16 - __ cmpxchgl(rscratch2, Address(addr, 0));
1.17 - __ mov(cmpval, rscratch1);
1.18 + // cmpval (rax) is implicitly used by this instruction
1.19 + __ cmpxchgl(rscratch1, Address(addr, 0));
1.20 } else
1.21 #endif
1.22 {
