src/share/vm/opto/subnode.cpp
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*** old/src/share/vm/opto/subnode.cpp	Fri Jan 31 10:27:27 2014
--- new/src/share/vm/opto/subnode.cpp	Fri Jan 31 10:27:27 2014

*** 1124,1138 **** --- 1124,1142 ---- // Change "bool tst (cmp con x)" into "bool ~tst (cmp x con)". // This moves the constant to the right. Helps value-numbering. Node *cmp = in(1); if( !cmp->is_Sub() ) return NULL; int cop = cmp->Opcode(); - if( cop == Op_FastLock || cop == Op_FastUnlock || cop == Op_FlagsProj) return NULL; Node *cmp1 = cmp->in(1); Node *cmp2 = cmp->in(2); if( !cmp1 ) return NULL; + if (_test._test == BoolTest::overflow || _test._test == BoolTest::no_overflow) { + return NULL; + } + // Constant on left? Node *con = cmp1; uint op2 = cmp2->Opcode(); // Move constants to the right of compare's to canonicalize. // Do not muck with Opaque1 nodes, as this indicates a loop

src/share/vm/opto/subnode.cpp
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